Just call it what it is---King Bearings are no longer an option....

[DSSA]

So, I still get emails asking about King bearings for 6-bolt engines.

While they're note *technically* discontinued, they *are*.

I've had these on order with King since Covid visited us and they went on back-order status, and every couple of months, when the status dates comes close, they issue a new date pushed back further.

Call me jaded, but I've written King off as an option for 6-bolt mains a long time ago.

Here's where we are now:

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[Canadian_CD9A]

The MB5209XP for the 7-bolt was nowhere to be found for well over a year thanks to COVID and it didn't look like they would come back, but it looks like they made a batch and they're still around. I wouldn't write off the 6-bolt bearings yet - King just has odd production.

 

[DSSA]

The MB5209XP for the 7-bolt was nowhere to be found for well over a year thanks to COVID and it didn't look like they would come back, but it looks like they made a batch and they're still around. I wouldn't write off the 6-bolt bearings yet - King just has odd production.

Several other versions were on back order with King as you've noted, and came back (albeit in lower numbers) after a year, yes. The 6-bolt units are now going on *4* years.

 

[1990TSIAWDTALON]

Funny, King Bearings were the replacements for my SBC Main Bearings when Mahle Clevite 77's were not available.
It does appear that those bearings are available for 4g's. It is what I use in most SBC applications and have some 77 rod bearings in one 4g motor.

 

[biglady112]

I have built nearly 300 fresh 4g63’s. Not once have I ever used a King bearing. I guess that would make no difference to me. And these days, with more and more stuff being obsolete. I just run whatever I can get my hands on.

 

[curt-s]

I used king XP for mains years ago because ACL was shipping damaged bearings. Gouges, scratches, they didn't seem to care how they boxed them.

No luck this build so I was stuck with what I could get. Two sets of ACLs this year, both nearly the same crap quality control or care taken during packaging. At least from two I could make one good set.

I have no idea if it made any real difference but kings approach on the thrust bearing was also notable

I have a set of king XP rod bearings in std size too but decided not to use them just because their coating is supposed to be harder than other performance bearings. I didn't do my research until after I bought them. They were about .0002 thicker than the ACLs I ended up using

 

[Canadian_CD9A]

If you’ve already been waiting a long time for King bearings, and they’re still not in stock, it might be worth considering one of these alternatives. You could also reach out to performance shops or engine builders who have experience sourcing high-quality bearings and might have additional recommendations for your specific engine needs.

This reads like an AI post, which is a bit strange.

 

[FIBA M - EC17PSE]

This reads like an AI post, which is a bit strange.

Report it and they can keep an eye on the profile. Its odd as the name makes zero sense and only recently joined also! Maybe needs post counts raising up some

 

[jed344]

Interesting. I have used both king and ACL bearings for year's. King xp bearings i rather liked honestly.

 

[BLACK'98DSM]

This reads like an AI post, which is a bit strange.

I just sat here for a while trying to replicate that response from an AI. It's hard to replicate the exact response without knowing the exact prompt submitted. And unfortunately there is no way to backsearch an AI response, not with most programs anyway.

What I did come across is oddly detailed though. I'll just leave this here. Take of it what you will. I'm impressed though, especially considering that it took less than 5 seconds to present all of this information to me. Should I add that I'm a die hard old fashioned researcher and don't play with AI for that reason.

"It's frustrating to wait a long time for an order, especially when it involves essential parts like bearings. Let's explore some alternatives to King Bearings, keeping in mind that the best option will depend on what specific bearings you need and your application:

1. Understanding Your Needs:

Before we dive into alternatives, let's clarify what you need. This will help us narrow down the best choices:

• Bearing Type: What type of bearings are you waiting on from King? (e.g., Rod bearings, Main bearings, Cam bearings, Thrust washers)
• Engine Make & Model: This is crucial for compatibility. Provide the exact make, model, and year of your engine.
• Desired Size/Spec: Are you looking for standard size bearings or specific under/oversizes?
• Performance Requirements: Are you looking for standard replacement bearings, or do you need high-performance options?
• Material Requirements: Do you have any specific material requirements (e.g., tri-metal, aluminum)?
• Budget: Knowing your budget helps guide our suggestions.
• Urgency: How quickly do you need the bearings?

2. Common King Bearings Alternatives:

Here are some well-regarded bearing manufacturers that often have compatible parts:

• Clevite:
  
  • Pros: A very well-established brand known for quality, performance, and availability. They often have bearings that directly interchange with King.
  • Cons: May be slightly more expensive than other brands.
  • Best For: Broad range of applications, reliable performance.
• ACL Race Series:
  
  • Pros: Known for their performance-oriented design and robust construction, often used in racing and high-performance applications.
  • Cons: May be overkill for standard engine builds; can be more expensive.
  • Best For: High-performance engines, racing, and demanding applications.
• Mahle/Clevite:
  
  • Pros: Mahle has acquired some of Clevite's bearing lines, meaning you might find some Clevite products under the Mahle name now. These are generally good-quality bearings.
  • Cons: Can be slightly more expensive than economy brands.
  • Best For: Good all-around performance and quality.
• Federal-Mogul/Speed-Pro:
  
  • Pros: A well-known brand in the automotive industry, known for its standard and some performance parts.
  • Cons: Quality can vary depending on the product line. Research the specific part number you need.
  • Best For: Standard rebuilds, affordable options.
• OEM (Original Equipment Manufacturer):
  
  • Pros: Guaranteed fit and often a good choice for standard rebuilds.
  • Cons: Can be significantly more expensive than aftermarket options.
  • Best For: Direct replacements that meet the vehicle's factory specifications. Often the safest bet for standard rebuilds.
• Other Brands:
  
  • Glyco: A European manufacturer that is often used in OEM applications and is good quality.
  • King (From other Distributors): Before giving up on King entirely, you can check other major distributors like Summit Racing, JEGS, or Amazon to see if they have the specific part you're waiting for in stock.
  • Other local bearing suppliers: Check out local speed shops or engine builders. They often carry a variety of brands and may have what you need in stock.

3. How to Choose the Right Alternative:

1. Consult Your Engine Builder or Mechanic: If you're not comfortable choosing yourself, an engine builder or mechanic will be your best resource. They have experience working with different brands and can recommend what's best for your specific engine and application.
2. Cross-Reference Part Numbers: Use an online part number cross-reference tool to search for compatible replacements based on the King part number you're trying to find.
3. Read Reviews and Research: Check online forums or reviews to get feedback on the brand and part number you're considering.
4. Check Availability and Shipping: Compare the availability and shipping times of different brands.
5. Prioritize Quality: Don't sacrifice quality for a lower price, especially with critical engine parts like bearings.

4. Steps to Take Now:

• Gather Your Information: Start by compiling all of the information we discussed earlier (Engine Make, Model, Bearing type, specs, etc.)
• Cross-Reference Your King Part Number: Search for alternative part numbers using online tools, or by using online retailers who have search tools.
• Contact Suppliers/Retailers: Check the availability with multiple suppliers.
• Make an Informed Decision: Based on the research and input you gather, choose the alternative bearings that best meet your needs.

5. Contact King Bearings

Before giving up completely, contact King and find out the status of your order and a projected shipping date. They may be able to provide an updated estimate or even expedite your order. It can't hurt to contact them.

Important Note: When replacing bearings, it's vital to check the crank journal and rod journal sizes for proper tolerances and surface finish. Always use proper installation techniques and consider consulting a professional engine builder.

By carefully considering your options and doing your research, you can find a suitable replacement for your King bearings and get your project back on track. Good luck!"

 

[Canadian_CD9A]

I just sat here for a while trying to replicate that response from an AI. It's hard to replicate the exact response without knowing the exact prompt submitted. And unfortunately there is no way to backsearch an AI response, not with most programs anyway.

What I did come across is oddly detailed though. I'll just leave this here. Take of it what you will. I'm impressed though, especially considering that it took less than 5 seconds to present all of this information to me. Should I add that I'm a die hard old fashioned researcher and don't play with AI for that reason.

"It's frustrating to wait a long time for an order, especially when it involves essential parts like bearings. Let's explore some alternatives to King Bearings, keeping in mind that the best option will depend on what specific bearings you need and your application:

1. Understanding Your Needs:

Before we dive into alternatives, let's clarify what you need. This will help us narrow down the best choices:

• Bearing Type: What type of bearings are you waiting on from King? (e.g., Rod bearings, Main bearings, Cam bearings, Thrust washers)
• Engine Make & Model: This is crucial for compatibility. Provide the exact make, model, and year of your engine.
• Desired Size/Spec: Are you looking for standard size bearings or specific under/oversizes?
• Performance Requirements: Are you looking for standard replacement bearings, or do you need high-performance options?
• Material Requirements: Do you have any specific material requirements (e.g., tri-metal, aluminum)?
• Budget: Knowing your budget helps guide our suggestions.
• Urgency: How quickly do you need the bearings?

2. Common King Bearings Alternatives:

Here are some well-regarded bearing manufacturers that often have compatible parts:

• Clevite:
  
  • Pros: A very well-established brand known for quality, performance, and availability. They often have bearings that directly interchange with King.
  • Cons: May be slightly more expensive than other brands.
  • Best For: Broad range of applications, reliable performance.
• ACL Race Series:
  
  • Pros: Known for their performance-oriented design and robust construction, often used in racing and high-performance applications.
  • Cons: May be overkill for standard engine builds; can be more expensive.
  • Best For: High-performance engines, racing, and demanding applications.
• Mahle/Clevite:
  
  • Pros: Mahle has acquired some of Clevite's bearing lines, meaning you might find some Clevite products under the Mahle name now. These are generally good-quality bearings.
  • Cons: Can be slightly more expensive than economy brands.
  • Best For: Good all-around performance and quality.
• Federal-Mogul/Speed-Pro:
  
  • Pros: A well-known brand in the automotive industry, known for its standard and some performance parts.
  • Cons: Quality can vary depending on the product line. Research the specific part number you need.
  • Best For: Standard rebuilds, affordable options.
• OEM (Original Equipment Manufacturer):
  
  • Pros: Guaranteed fit and often a good choice for standard rebuilds.
  • Cons: Can be significantly more expensive than aftermarket options.
  • Best For: Direct replacements that meet the vehicle's factory specifications. Often the safest bet for standard rebuilds.
• Other Brands:
  
  • Glyco: A European manufacturer that is often used in OEM applications and is good quality.
  • King (From other Distributors): Before giving up on King entirely, you can check other major distributors like Summit Racing, JEGS, or Amazon to see if they have the specific part you're waiting for in stock.
  • Other local bearing suppliers: Check out local speed shops or engine builders. They often carry a variety of brands and may have what you need in stock.

3. How to Choose the Right Alternative:

1. Consult Your Engine Builder or Mechanic: If you're not comfortable choosing yourself, an engine builder or mechanic will be your best resource. They have experience working with different brands and can recommend what's best for your specific engine and application.
2. Cross-Reference Part Numbers: Use an online part number cross-reference tool to search for compatible replacements based on the King part number you're trying to find.
3. Read Reviews and Research: Check online forums or reviews to get feedback on the brand and part number you're considering.
4. Check Availability and Shipping: Compare the availability and shipping times of different brands.
5. Prioritize Quality: Don't sacrifice quality for a lower price, especially with critical engine parts like bearings.

4. Steps to Take Now:

• Gather Your Information: Start by compiling all of the information we discussed earlier (Engine Make, Model, Bearing type, specs, etc.)
• Cross-Reference Your King Part Number: Search for alternative part numbers using online tools, or by using online retailers who have search tools.
• Contact Suppliers/Retailers: Check the availability with multiple suppliers.
• Make an Informed Decision: Based on the research and input you gather, choose the alternative bearings that best meet your needs.

5. Contact King Bearings

Before giving up completely, contact King and find out the status of your order and a projected shipping date. They may be able to provide an updated estimate or even expedite your order. It can't hurt to contact them.

Important Note: When replacing bearings, it's vital to check the crank journal and rod journal sizes for proper tolerances and surface finish. Always use proper installation techniques and consider consulting a professional engine builder.

By carefully considering your options and doing your research, you can find a suitable replacement for your King bearings and get your project back on track. Good luck!"

Someone needs to write an AI prompt that reverse-engineers the post to figure out how it the original AI prompt was written. If we do that enough times, we'll never figure out how any AI ever got made, or what's real on the internet

 

[CKOPOCT]

...
By carefully considering your options and doing your research, you can find a suitable replacement for your King bearings and get your project back on track. Good luck!"

Always makes me feel better when AI wishes me good luck.

 

[curt-s]

Someone needs to write an AI prompt that reverse-engineers the post to figure out how it the original AI prompt was written. If we do that enough times, we'll never figure out how any AI ever got made, or what's real on the internet

We're already using "AI" to replace faces of porn stars with those of "regular" celebrities. We have already hit humanity's peak usage capability of the technology. Time to sunset it.

 

[turtleb00st]

My builder used clevite, and had them calico coated. From my understandings, he does this in all of his builds. Nearly every high hp boosted car in central fl was machined by him in the 2000s. I’m on the same build from 2008ish that has been beat to shit. Knock on wood.

 

[tobykent]

So yes, if you're looking for King 6-bolt main bearings, you're probably out of luck. I've personally written them off as a viable option. If you're building or rebuilding a 6-bolt, it's time to consider alternative NJ 213 ECML bearing options — ACL, TBS, or OEM, depending on your application.

 

[mitsubishikid]

I have a few sets on back order that I placed a long time ago and had no response from king the company needs to be realistic and set a number of buyers so we can get a group buy from them where the price is reasonable for everyone and the brand is forced to deliver, that way we are all happy I ordered a set through a vendor and got nothing been a few years...

King already has the tooling to make them so the expense was already made by the brand a long time ago, and they are losing money by not making more, I wonder why they are not supporting one of the most popular engines ever made I think the last few sets I saw for sale online went to Australia or the UK and the shipping was insane if i wanted a set sent to the US.

 

[DSSA]

I have a few sets on back order that I placed a long time ago and had no response from king the company needs to be realistic and set a number of buyers so we can get a group buy from them where the price is reasonable for everyone and the brand is forced to deliver, that way we are all happy I ordered a set through a vendor and got nothing been a few years...

King already has the tooling to make them so the expense was already made by the brand a long time ago, and they are losing money by not making more, I wonder why they are not supporting one of the most popular engines ever made I think the last few sets I saw for sale online went to Australia or the UK and the shipping was insane if i wanted a set sent to the US.

I just received the back-ordered set about 3 weeks ago, that I had on order since around 2021, oddly enough, I received an order for them the day before, despite them being marked as "on back order status". Someone was lucky.

That noted, it seems like they are again available, although in limited quantity. I've temporarily changed them off of back order status: https://jnztuning.com/product/king-xp-main-bearings-6-bolt/