rebuilding the 7 bolt

blk_srt · #1 08-01-2006, 12:35 PM

This is what I want to do. I cw'd and I want to stroke my motor, but if I wait untill next summer I can do it in school and have professional help and the school will pay for some of it. Also when I told my parents its going to be $2k for just the engine they kind of freaked out. That said I want to rebuild the 7 bolt just so it will last untill next summer(I dont drive it in the winter) Do you think I can get away with remanning the crank and replacing th bearings? I know you never know untill you measure it but I though maybe someone else tried it. The other option is my parents said that they would give me an early birthday and xmas present and pay for my to build a stroker but then I'll need a clutch and flywheel and everything else to do the 6 bolt swap so I think its better to wait

defiancy · #2 08-01-2006, 02:35 PM

Quote:

Originally Posted by pr_ricer

This is what I want to do. I cw'd and I want to stroke my motor, but if I wait untill next summer I can do it in school and have professional help and the school will pay for some of it. Also when I told my parents its going to be $2k for just the engine they kind of freaked out. That said I want to rebuild the 7 bolt just so it will last untill next summer(I dont drive it in the winter) Do you think I can get away with remanning the crank and replacing th bearings? I know you never know untill you measure it but I though maybe someone else tried it. The other option is my parents said that they would give me an early birthday and xmas present and pay for my to build a stroker but then I'll need a clutch and flywheel and everything else to do the 6 bolt swap so I think its better to wait

Well you can just buy a new crank. They aren't that expensive. The thing about 4g63 cranks, is no one machines them because when you machine a crank or remann it it degrades the quality of the crank. It's common to do this on big block V8's because the cranks are much more expensive. If I were you I would just buy a new crank. They are inexpensive.

blk_srt · #3 08-01-2006, 02:48 PM

Any idea where I can find a cheap crank?

pnkrocker4life · #4 08-01-2006, 03:51 PM

go to machv.com.......look on the left side of the page under engine and scroll down, you'll see mitsubishi OEM crank(7bolt). thats where id start....its 600 bucks though. depends on if you wanna spend that much or find one in a junk yard

vanilla gorilla · #5 08-01-2006, 04:14 PM

Ever think about stroking the 7 bolt?

blk_srt · #6 08-01-2006, 05:02 PM

Yeah I have thought about it, and I was strongly considering it at one point but I figured that If I'm going to spend that much money I might as well not take any chances

MexRocket · #7 08-01-2006, 05:07 PM

look at ffwdconnection.com they have the best cranks for pretty cheap I think.... well, the butcher crank for the stroker is fucking crazy.... check them out...

crunchymilk55 · #8 08-01-2006, 05:27 PM

did you ever verify 100% it has walked?

defiancy · #9 08-01-2006, 05:35 PM

I bought mine from a local shop. It was no where near 600 dollars. You can check junk yards in your area, you can probably find a good crank there.

Or if you have any DSM shops in th area they probably have one.

Thor06 · #10 08-01-2006, 05:59 PM

Why waste money? Junk the 7 bolt and do up the 6 bolt. Hey Scott, want to start our own car club?

gthompson97 · #11 08-01-2006, 07:59 PM

New bearings and a reman'd crank should get you up and running until you want to build up that 7 bolt. Just make sure you go to a shop where they know what they're doing. I've had a couple cranks ground before and they turned out just fine.

blk_srt · #12 08-01-2006, 08:39 PM

Quote:

Originally Posted by crunchymilk55

did you ever verify 100% it has walked?

Endplay was close to .020 and according to what I've read the max is .015.

Quote:

Originally Posted by gthompson97

New bearings and a reman'd crank should get you up and running until you want to build up that 7 bolt. Just make sure you go to a shop where they know what they're doing. I've had a couple cranks ground before and they turned out just fine.

Thats good news. I should be up by the end of the month then

blk_srt · #13 08-02-2006, 03:15 PM

I just got back from the machinest and he suggested that he weld material on the crank and reharden it and then grind it down to stock size so I can use standard bearings and it will be a hardened surface again and its going to cost $175 for all of that plus bearings

defiancy · #14 08-03-2006, 04:37 PM

Quote:

Originally Posted by pr_ricer

I just got back from the machinest and he suggested that he weld material on the crank and reharden it and then grind it down to stock size so I can use standard bearings and it will be a hardened surface again and its going to cost $175 for all of that plus bearings

My shop is a dsm shop and I asked them about this, and they advised against this, but it's your buck.

blk_srt · #15 08-03-2006, 07:39 PM

What do they reccomend besides a new crank?

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