6 bolt vs. 7 bolt [merged] 6bolt 7bolt 6-bolt 7-bolt six bolt seven bolt

[asdfzxc]

All 6 bolt vs. 7 bolt threads are merged here.
How do I tell if I have a 6 bolt or a 7 bolt?
Will x part from a 6 bolt fit a 7 bolt?
Will x part from a 7 bolt fit a 6 bolt?
Which one is better?
How do I swap my x bolt for an x bolt?

What is the difference between 6-bolt and 7-bolt engines (aside from the obvious - 6 vs. 7 bolts connecting the flywheel )

Is there an advantage over either of the two engines?

Thanks,

-Mike

 

[IHeartTurbo]

If there are 7 bolts holding the flywheel to the crank, then you definitely have a 7 bolt.

But it's not that big of a deal. Atleast you don't have a 2g 7 bolt.

 

[dark1]

is there less chance of crankwalk with a 1G 7 bolt?

 

[1gfromND]

Got to do a search on this stuff . A 1g 7bolt is really nothin to worry about. I had a 93 with 150k on it and had no problems. Even with a 2g its a hit and miss thing. Dont even worry about it, run til' it dies then get a 6 bolt..IF it ever dies. Looks like you didnt go far enough out of your way if you bought a 91 with a 7 bolt in her. Sam

 

[dark1]

thanks for the comment sam, I wasnt informed that the engine had ever been swapped when I bought the car, if they had I would ve had second thoughts I'm sure. Well I am in the middle of a rebuilt at 123K so maybe it will last a 150K, I would be happy with that.

 

[Corpssnare]

Just because it's a 7-bolt doesn't mean it's guaranteed to walk or break down on you. 7-bolts are just more likely to walk, but if you're already at 123k, it'll be fine. it'll last up to 180 or even 200k if you keep it maintaned. Most cranks walk around or before the 70-90k mile range. Mine did at 52k. If you're that adamant about not having the 7-bolt then go ahead and swap, but what you have already will work fine.

To answer your question earlier, 2G 7-bolts are more likely to walk than 1Gs, especially the 95-96 2Gs.

 

[redg1clipse]

okay guys. i think it is. but is it possible to change my motor from a seven bolt to a six? and how hard and how much time and money would it take? my 7bolt is shitty, well, its in good shape but its just the fact its a seven bolt. so can i just take like the bottom of my block and stick it with my current head? or what goes on during the change of this all?

 

[Lunch_Box]

Do you have the 2.0L engine or the 1.8L engine?

 

[hereitcomes]

The crank on the bottom end of the 7-bolt needs to be changed. This is what is in reference to the "6-bolt".
You will need a 6 bolt crankshaft and a 6-bolt flywheel.

 

[i1nk83]

you will need a 6bolt block. not just the crank and flywheel. is this for the nt 2.0? if so dont even bother with it unless your motor is don for. not worth the time for a nt

 

[Spoolin4Ever]

I agree, not to be worried about.

If you do it, then put in a 6 bolt turbo engine (and all the other stuff you would need).

 

[bryanwheat]

The crank on the bottom end of the 7-bolt needs to be changed. This is what is in reference to the "6-bolt".
You will need a 6 bolt crankshaft and a 6-bolt flywheel.

You can not just simply swap in a 6 bolt crank. It is not interchangable. You will need the 6 bolt block too. If it is a 1g 7 bolt, just rebuild it, if it is a 2g 7 bolt than swap in a 6 bolt.

 

[redg1clipse]

its a 7bolt from a 98 eclipse gst. the guy had it turbo charged. but only kept the motor for like a month. after that it sat in his garage for ever. i got it like a year and a half ago and am just getting around to putting it in. umm. yeah. i plan on making it into like. pretty much a street legal race car. i have money to do it. but i have to pay speeding tickets and gas, o, and insurance. so yeah. its a 2.0L. and I believe that i built 7 isnt as good as a built 6. plus the motor ###### has had the crap kicked out of it. so, yeah. get back to me on that.
cody

 

[Spyderman7]

If your trying to put a 2g 7bolt in a 94 Laser,you can't.There's no front or back motor mounts on the block.

 

[wolf20043]

If your trying to put a 2g 7bolt in a 94 Laser,you can't.There's no front or back motor mounts on the block.

Exactly. The front and rear mounts for the 2g 7 bolt are on the tranny, not the block.
Mike

 

[redg1clipse]

yes it will. my friends down at zero lift autoworks have shown me. and you can make it fit. thats when you have them change it out. they make it work some how. i've seen them do it befor. it may sound like i dont know what im talking about. but i know. but yeah. how much time and money do you guys think it will cost? and somebody told me that i can put a six bolt tranny onto the 7bolt hook up. i have to change something? would that be cheeper then buying a 7bolt tranny or buying and having the 7 bolt changed to the six. like. explain to me somebody. i just need my car to be fixed. or parted out. which would i make more money from.
the cars a 94 laser with the 2.0 liter non turbo 4g63. umm. its red and in awsome condition. i have all parts except the tranny and the passenger side axle. i was looking for a honda. so i kinda want to get rid of my dsm. umm. wich would i make more money off of. fixing it and selling it. or selling it as is. or parting it out?
i have almost every thing. the lights are the cateyes. and theres rust in one spot on the passenger side rear wheel well, its not bad. so yeah. comment, tell me whats up.

 

[1LE]

Don't waste your time and money putting a 6-bolt in.

 

[Fast GST]

Really man dont waste your time with a 6 bolt, let me ask you something? Does the thrust bearing have 3 pieces to it? If it does you should be fine with building a 7 bolt, I had a 1999 7 bolt , I built the motor myself and it was really a great motor. I am building another one but its a 1998 7 bolt its going to be even better. The only thing you have to wacth out for are the 7 bolt motors with the one piece thrust bearing. good luck

 

[1LE]

If your trying to put a 2g 7bolt in a 94 Laser,you can't.There's no front or back motor mounts on the block.

Well, it *has* been done before, but it's a *lot* of work for essentially nothing. Cheaper to just get an engine that fits right in the first place...

So, original poster... You have a 1g 7-bolt in a car and you don't like it, you have a race built 2g 7-bolt that you want to put in, but you're planning on building a 6-bolt??? Did I get all that right??? If you've got that much money to throw around, you'd probably be best served by selling the current car and buying something newer and nicer...

 

[redg1clipse]

no. you didnt get that rite. i had some shitty motor in befor. so what i did was took it out and are planning to either get rid of it. or put the motor in and sell it. or maybe just sell it out for parts. whats should i do?

 

[AquariumPerson]

Hi, I have a 1990 FWD 2.0l non turbocharged eclipse and need to know if it is a 6 or 7 bolt. THe reason is my valve cover is cracked bad and I already got a replacement for that, I just need to know which gasket to get. (I think i read that there are 2 diff. gaskets for the 6 or 7 bolt) My engine is not the original one to my knowledge, it is a different one that was rebuilt BUT the same "type" of engine as the original (1G 2.0l non turbo). I have searched but with no results.

What are the differences between the gaskets anyways for the valve cover? thanks

 

[JDNSBR]

The 1990 2.0's were still a 4g63. They did not have 7bolts untill 92.5. You have a 6 bolt

 

[milz]

the valve cover gasket should be the same. im like 97% sure I would call a part store to be 100% sure.
I just called napa to make sure and he said yes they do!

 

[Opus69]

Odds are good that it is indeed a 6 bolt... With it being a rebuilt (non-original) here is a way to tell for sure from the oil pan:

http://www.vfaq.com/mods/early-late-engine.html

 

[AquariumPerson]

well I probably have a 6 bolt. I'll just get that gasket from a auto store, and slap that new valve cover on and tighten those bolts down not too hard, I will be really mad if I crack the new valve cover.

How tight should the bolts be anyways? As tight as you can get them with your hands only? errr.........

I have no idea, I dont want to break anything.


Thanks

 

[9awd4g63tsi2]

Do NOT tighten down those valve cover bolts as hard as you can. The torque specs are very low. Something like 7 lbs of torque for the bolts
. I'm sure someone here has that info available at hand.