Is A Built 1G 7Bolt good as a Built 1G 6Bolt?

[spadepro22]

Im thinking about doing a rebuild due to low compression. The thing is should I rebuild my 1g 7bolt? It would save me money from not having to buy a 6bolt, but with a built 1g 7bolt, would it be as good as a built 6bolt? I never here anyone saying there 1g 7bolt walked.

 

[1gAWDlaser]

Rebuild your 7 bolt. "Crankwalk" is for various reasons. 7 bolts don't all walk. 97-99 thrust bearings were junk and were beat by heavy clutches.. Someone correct me if I am wrong.

 

[boost97gst]

I agree, its over rated. 7 bolts are fine. Just get a good machinist and go with good internals and youll have an engine that can take a ton of abuse.

 

[spadepro22]

Finding a good machinist is going to be the problem in my area. I dont know of any. The motor shop that Ive been dealing with is about 2.30 hours away and lately Ive been trying to contact them about a build, but It seems there putting me off. Ive called several times with no call back.

 

[ed1380]

You mean 95-early 97. 97.5-99 have the upgraded thrust bearings.

Just build the 7 bolt. Its also easier to find a 7bolt 2.4 crank.

Rebuild your 7 bolt. "Crankwalk" is for various reasons. 7 bolts don't all walk. 97-99 thrust bearings were junk and were beat by heavy clutches.. Someone correct me if I am wrong.

 

[estoyaqui30]

Rebuild your 7 bolt. "Crankwalk" is for various reasons. 7 bolts don't all walk. 97-99 thrust bearings were junk and were beat by heavy clutches.. Someone correct me if I am wrong.

Actually, I think it's the 95 to 97 7 bolts that had the bad thrust bearings. I heard that the 98 to 99 7 bolts were fine. Mine, is a 99 with 190,000 miles on the original bottom end. I'm running act 2100 and 2600 for the last 8 years.

 

[1gAWDlaser]

You mean 95-early 97. 97.5-99 have the upgraded thrust bearings.

Just build the 7 bolt. Its also easier to find a 7bolt 2.4 crank.

Yes, thank you for the correction

The clutch adjustment is a big part of the 7 bolts walking along with other variables. Rebuild your 7 bolt and I believe the thrust bearings were revised. Have the the machine shop inspect your crank and polish it up if it is still within spec.

 

[spadepro22]

What do you 6Bolt guys think?

 

[1gAWDlaser]

I am a 6 bolt guy and I have a spare block. I personally would rebuild the 7 bolt. whichever way you decide to go make sure that you have the ball bearings that are in the crank that are used to plug the oil galleys removed. I removed them with a tig welder or in my case i ended up using a plasma cutter to get the slag and remaining particles from the ball bearings out. there is about 1/2 inch of goo gunk and build up behind those ball bearings that can and have ruined brand new rebuilds. pm if you have questions on how to remove those tiny ball bearings.

 

[spadepro22]

Has anyone had a motor rebuilt by any members on dsmtuner? Any reputable members?

 

[boost97gst]

I might get hell for suggesting him, cause he might not do it, but bogussvo(something like that) is a machinist iirc. He seems to know a TON about our engines. I had to have my build done twice. Started knocking in 300 miles. Guy didnt cut the crank right is our best guess. So make sure whomever you take it to knows 4g63s. They have to.

 

[H@xtGSX]

My 7 bolt walked.... After 126,000 miles. I have a early 95 block, and even though it walked after 17 years, I rebuilt it and it is still going strong. 7 bolts are very strong motors, except the thrust bearing design. Even so, there are some tweaks that help mitigate the poor design problems of the thrust bearing.

 

[95talongirl]

Rebuild the 7-bolt.

The trick is locating a place that will do a nice job on the machine work. I had mine done by a shop that was 4 hours away because they had a top-notch reputation. However, that shop is in MI, so it's s little far for you.

Ask people who race in the area where they get their machine work done, this may help you find a good shop.

 

[JacksonAuto]

They hold up just fine when built properly. We've built literally hundreds of them. We prefer to use a 6 bolt in higher HP builds (650-700+) but the 2g 7 bolts hold up real well if you keep it under those numbers.

 

[spadepro22]

Hope I can find one soon, or ill have no choice but to part ways with my dsm. I can't afford to take a chance with shops that don't the ends and outs. Not turning this into a add but I'm in the market for a built 6 bolt maybe a 1g 7 bolt freshly rebuilt or with proof of great compression. Inbox me and don't post here so we can stay on topic.

 

[JwpRider]

I have read many times...it is not so much what is 'in' the rebuilt motor, but it is ALL about 'how' it is done. If you buy a 'rebuilt' motor you are still at risk of 'not knowing' if it is all good. If you find a good shop and manage your own rebuild (7-Bolt), you will at least know what (and how) was done. It may be worth the extra effort for piece of mind...

You can spend a few extra bucks to ship your motor to a proven shop, overall the extra shipping cost would not be a great percentage of the total costs vs. finding a local 'un-proven' place.

Do your own research on here...there are many posts of 'fresh rebuilds' that don't last very long. Many tips and tricks are applicable to these 4G63's.

Nice post for trying to do your homework! Good luck!

 

[spadepro22]

Any proven shops out there that you guys would recommend. As far as shipping, do you guys think I'd be better just buying a motor that needs rebuilt instead of pulling and shipping mine if it comes to that point because I'd assume shipping around 400-500.

 

[JwpRider]

Any proven shops out there that you guys would recommend. As far as shipping, do you guys think I'd be better just buying a motor that needs rebuilt instead of pulling and shipping mine if it comes to that point because I'd assume shipping around 400-500.

The way I see it is you have to pull the motor anyway. So if you are on a tight budget (who isn't?), rebuild YOUR motor. My guess is it would be less money than buying ANOTHER motor. Unless you want a bunch of spare motor parts.

Maybe one way to save is to just have your bottom end shipped/rebuilt. If the head needs done, you could probably do that yourself to save some cash (except for some machine work if needed). BogusSVO is one expert to consult.

 

[ed1380]

What is wrong with the motor? If it's a spun bearing you can do it yourself. Just replace the crank, rod(s), and bearings/seals. But if it's head or bore related then you'd need a machinist.

 

[spadepro22]

The way I see it is you have to pull the motor anyway. So if you are on a tight budget (who isn't?), rebuild YOUR motor. My guess is it would be less money than buying ANOTHER motor. Unless you want a bunch of spare motor parts.

Maybe one way to save is to just have your bottom end shipped/rebuilt. If the head needs done, you could probably do that yourself to save some cash (except for some machine work if needed). BogusSVO is one expert to consult.

PS: No such thing as a "1G 7-Bolt"

Ive learned here that there is a 1g 7 bolt and its supose to be better than a 2g 7bolt. I don't know if its proven or not but I do know there are differences between the two.

 

[burkgonzo]

Either motor can "crankwalk" its just a matter of getting a good rebuild done.

 

[spadepro22]

Either motor can "crankwalk" its just a matter of getting a good rebuild done.

That I understand, but the 1g 7 is said to be better right? If so then there is a difference.

 

[burkgonzo]

Pretty sure there is not a difference, not much of one as far as the block goes. I assume you have a 1g with a 7 bolt, so if you if want it to be better then its better . Just rebuild the engine you have unless its beyond repair.

 

[spadepro22]

Lol, if I want it to be better. They are what they are but I'm sure 1 walks more than the other so something has to be different.

 

[mchustle]

Like stated above if you want machine work pm bogus. I've heard of members on here sending him parts to machine before so I'm pretty sure he wouldn't have a problem with it. Atleast you can be pretty sure he knows about dsms if he is a wiseman on the biggest Dsm site .

Ps for the guy that said no 1g 7bolts, don't spread misinformation there most certainly are. Find yourself a 93-94 1g and pull the motor and be surprised by the extra flywheel bolt .