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Old 03-11-2008, 11:53 PM   #26
wrxG
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Thanks guys for all the advise.. Its weird when car starts up cold.. like in the morning theres no knock what so ever ... but once i drive it for a little while it comes on.. I parked my car today and will take it apart this weekend.. I really cant wait to find out what went wrong .. will post pics once its all apart.
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Old 03-12-2008, 12:24 AM   #27
wrxwagon253
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Good luck with your car..Hope everything works out for the best..
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Old 03-12-2008, 12:42 AM   #28
slowmike
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Quote:
Originally Posted by wrxG View Post
I did get my halves cleaned and rehoned. But if block is honed or unhoned i really dont see how that would case knock. The first time i rebuilt this block with stock subaru parts. I got my cranshaft balanced and machined caz num 3 rod bearing was spun, and i didn't rehone the cylynders but i still made 180 psi compression in allfour cylinders.

I remember when I put the Wiseco pistons in I moved the piston from side to side and seemed like it had way too much play on cylinder three. But one of my friends with "expirience" told me oh thats normal. Now im 90% sure thas the problem unless like some of you are saying .. i didn't crank the motor over enough to get the oil pump going and it could of started with any oil pressure and caused a rod bearing to spin or something.

Right now I don't even touch my car .. im so mad at it. So much time and I cant even drive it still. All of my friends with hondas are laughing at me.. they're telling me to get a honda =( .. but I know once it going to be done.. the right way.. im going to have alot of fun with it this summer killen them hondas!
Did you get oversized bearings to match the newly machined crank?
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Old 03-12-2008, 03:49 PM   #29
wrxG
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^ ofcource the machine shop supplied them for me^
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Old 03-16-2008, 01:03 AM   #30
wrxG
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Okay so I found out what the problem was! I told you guys how my rod bearing are 0.25 oversised because cranshaft was macined down after rod bearing num 3 spun. So i did use oversised bearings on rods.. but what i didn't relize was that i need oversised main bearings too.. i used cosworth main bearing set which is stock size.. I cant believe i did that still.. so its a prety easy fix just alot of work to rip the motor all apart.
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Old 03-16-2008, 02:36 AM   #31
flycaster
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Your idea of "easy" isn't the same as mine...

Good luck, and let us know how it sounds after you rebuild it.
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Old 03-16-2008, 03:10 AM   #32
reddevil
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You know, I installed a crank backwards, but at least I caught the error.
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Old 03-17-2008, 12:03 AM   #33
wrxG
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Originally Posted by flycaster View Post
Your idea of "easy" isn't the same as mine...

Good luck, and let us know how it sounds after you rebuild it.
For me its easy.. i took the motor out and riped it all apart in under 3 and a half hours .. crank is at the machine shop getting check out and they will order the right size bearing for me .. dont know what u think is so hard about it .. unless uve never took the whole motor aprt b4....
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Old 03-17-2008, 12:04 AM   #34
wrxG
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You know, I installed a crank backwards, but at least I caught the error.
haha nice man! that would work to well probly
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Old 03-17-2008, 01:22 AM   #35
flycaster
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...dont know what u think is so hard about it...
"Easy" is something that takes 10 minutes, not 10+ hours. Regardless, I sure hope you slow down a little on the rebuild this time - "fast" leads to mistakes, as you already know.
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Old 03-17-2008, 10:21 AM   #36
wrxG
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Originally Posted by flycaster View Post
"Easy" is something that takes 10 minutes, not 10+ hours. Regardless, I sure hope you slow down a little on the rebuild this time - "fast" leads to mistakes, as you already know.

Yeai know thats true .. ill try to take it easy this time .. thanks
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Old 03-17-2008, 12:06 PM   #37
flycaster
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Cool - I'd much rather read a new thread which goes something like, "Built motor - runs like a dream."

BTW, 3.5 hours to take an engine out, on the stand, heads off, and then split the cases is greased lightning fast for 1 guy - especially if the engine still has all the stock accessories on it. That's an hour and a half less than book for just a clutch R&R. I assume you do this for a living?

Last edited by flycaster; 03-17-2008 at 12:16 PM.
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Old 03-17-2008, 04:37 PM   #38
wrxG
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Originally Posted by flycaster View Post
Cool - I'd much rather read a new thread which goes something like, "Built motor - runs like a dream."

BTW, 3.5 hours to take an engine out, on the stand, heads off, and then split the cases is greased lightning fast for 1 guy - especially if the engine still has all the stock accessories on it. That's an hour and a half less than book for just a clutch R&R. I assume you do this for a living?

Haha yea i cant wait to post that thread

I used to deal with subarus for a lilving yeah.. now i just fix my car and help out friedns with subarus
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Old 03-17-2008, 04:45 PM   #39
Rick539
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Had knock just as you described. Using helix rods. It turned out to be a rod clearance problem. All four were just clipping the block webbing on the 1 and 3 side. Interestingly we measured the webbing on the 2 and 4 side and it was 1.5mm shorter. Milled 2mm off the webbing and no more knock.
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Old 03-18-2008, 02:23 AM   #40
benw
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Originally Posted by Rick539 View Post
Had knock just as you described. Using helix rods. It turned out to be a rod clearance problem. All four were just clipping the block webbing on the 1 and 3 side. Interestingly we measured the webbing on the 2 and 4 side and it was 1.5mm shorter. Milled 2mm off the webbing and no more knock.
Yikes!

Buddy of mine had a similar "I'll be damned!" moment. Got his car tuned, parked it for 4 days during a bad ice storm. started it up, and knocking like crazy. sounded like rod knock from hell. diagnosis was that the piston was actually hitting the block webbing. we think an injector filled a jug and semi-hydro'd that cylinder and fubar'd the rod. It must have happened on startup because we traveled all the way home from Dallas to OKC and it ran like a sweetheart, I was in the car the whole time.
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