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Old 01-12-2011, 02:14 AM   #1
auslyle
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Default So found out what made my car sounds like two squirrels fighting in my engine bay

so I decided to rip down my block today and what I found was just what I thought I would find. Spun bearing... Bummer deal. so I guess I'll send the crank in to be machined down, Order some some new ACL bearings once we find out how much material needs to be removed to get it back smooth. get the block hot dipped and cleaned up. new seals, piston rings and put it all back together should be like new again.

not really supposed to look like this.

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Last edited by auslyle; 01-12-2011 at 01:25 PM. Reason: because I can't spell
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Old 01-12-2011, 02:20 AM   #2
williaty
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Wow, you did an even better job on yours than I did on mine!

I mean, we're supposed to use those bearings up to get our money's worth, right?
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Old 01-12-2011, 02:43 AM   #3
auslyle
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Quote:
Originally Posted by williaty View Post
Wow, you did an even better job on yours than I did on mine!

I mean, we're supposed to use those bearings up to get our money's worth, right?

ohhh yeah you know it! see most people when they hear their car knocking they shut it off well me... just turned up the music haha. I have a system for a reason
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Old 01-12-2011, 02:45 AM   #4
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Heh, I didn't recognize the sound at first, so I proceeded to drive the car at WOT for another 10 minutes after it first started. Oops. Nothing like 7000RPM with a 280F oil temp on 4 spun bearings...
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Old 01-12-2011, 02:49 AM   #5
auslyle
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damn thats way worse than mine.... the bad thing is this is the third motor ive done this to. so im open to suggestions haha
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Old 01-12-2011, 02:58 AM   #6
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The questions everybody is dying to ask are... How long do you warm it up in the morning? and What kind of oil do you use? Edit: My apologies tho man that sucks!
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Old 01-12-2011, 03:01 AM   #7
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Well, how long isn't the right question about warming it up.

The ideal warm up is to let it idle for 30 seconds or so, blip the throttle to about 50% of redline twice or so, then drive it gently while keeping it under 3kRPM until the oil temp goes over 180F.

Just sitting and letting it idle for any long length of time is bad for the oil and engine.
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Old 01-12-2011, 03:05 AM   #8
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Quote:
Originally Posted by Seventh View Post
The questions everybody is dying to ask are... How long do you warm it up in the morning? and What kind of oil do you use? Edit: My apologies tho man that sucks!
I take it easy on it till it gets up to operating temp.... but I do drive it like i stole it often haha this motor that the pictures are from happened at the beach drifting driftwood. Castrol full synthetic
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Old 01-12-2011, 03:07 AM   #9
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Have you replaced the bottom end ever or you just keep rebuilding the same one?
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Old 01-12-2011, 03:09 AM   #10
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this was the motor before this one



Last edited by auslyle; 01-12-2011 at 03:27 AM. Reason: added the picture of the head
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Old 01-12-2011, 03:10 AM   #11
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^^^^
So a hone and you rebuilt it, right?



To be serious, though, why does that block have so much rust in it?
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Old 01-12-2011, 03:10 AM   #12
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I have had a new block in it every time, ive even had a built high reving na.... that was fun
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Old 01-12-2011, 03:13 AM   #13
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Quote:
Originally Posted by williaty View Post
^^^^
So a hone and you rebuilt it, right?



To be serious, though, why does that block have so much rust in it?
the rust is from the coolant sitting in it and not taking it apart right away.
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Old 01-12-2011, 03:17 AM   #14
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the block i took apart to day though seems to be just fine, needs cleaned up and what not but it still has the honing marks on the cylinder walls.
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Old 01-12-2011, 09:27 AM   #15
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So what do you think is killing your motors? low oil? cavitation? bearing starved from high g loads?

Did you upgrade your oil pump on any of these engines?
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Old 01-12-2011, 09:34 AM   #16
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Quote:
Originally Posted by williaty View Post
Well, how long isn't the right question about warming it up.

The ideal warm up is to let it idle for 30 seconds or so, blip the throttle to about 50% of redline twice or so, then drive it gently while keeping it under 3kRPM until the oil temp goes over 180F.

Just sitting and letting it idle for any long length of time is bad for the oil and engine.

This^^
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Old 01-12-2011, 09:36 AM   #17
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Man you should consider a new crank
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Old 01-12-2011, 10:46 AM   #18
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I agree cranks are cheap and then you know it is right also easier to get it all perfect again too.. just put in and go.
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Old 01-12-2011, 11:25 AM   #19
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Quote:
Originally Posted by williaty View Post
The ideal warm up is to let it idle for 30 seconds or so, blip the throttle to about 50% of redline twice or so, then drive it gently while keeping it under 3kRPM until the oil temp goes over 180F.

Just sitting and letting it idle for any long length of time is bad for the oil and engine.
Damn, I didn't know that. When are you going to make a williaty FAQ with all of this stuff that I didn't know/even know to ask? Of course, I guess it wouldn't be a FAQ, more like a Should Be Frequently Asked Questions But Nobody Knows to Ask, or SBFAQBNKA.

Jacob
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Old 01-12-2011, 01:21 PM   #20
auslyle
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Quote:
Originally Posted by watchdoc View Post
So what do you think is killing your motors? low oil? cavitation? bearing starved from high g loads?

Did you upgrade your oil pump on any of these engines?
its oil starvation for sure, this motor had just hand a RS oil pump on it, but ones before have been sti oil pumps
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Old 01-12-2011, 01:22 PM   #21
auslyle
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Originally Posted by GEE-OTTO View Post
Man you should consider a new crank
looking into it but might just have this one machined, knifed and blueprinted
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Old 01-12-2011, 01:31 PM   #22
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Quote:
Originally Posted by auslyle View Post
its oil starvation for sure, this motor had just hand a RS oil pump on it, but ones before have been sti oil pumps
Unless you were running substantially larger than stock bearing clearances and you had an oil pressure gauge showing you that you were making less than 10psi/1kRPM, it wasn't the oil pump's fault.

The 7mm oil pump will make 20psi/1kRPM on stock bearing clearances. That's more than enough flow.
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Old 01-12-2011, 01:35 PM   #23
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Quote:
Originally Posted by williaty View Post
Well, how long isn't the right question about warming it up.

The ideal warm up is to let it idle for 30 seconds or so, blip the throttle to about 50% of redline twice or so, then drive it gently while keeping it under 3kRPM until the oil temp goes over 180F.

Just sitting and letting it idle for any long length of time is bad for the oil and engine.
I heard similar advice from my cousin who is a total motorhead... know what the general theory behind it is??
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Old 01-12-2011, 01:38 PM   #24
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While the oil is cold, the engine is dying. You need to get the oil up to temp as fast as possible. However, if you were to go WOT (which would warm the engine up really fast), the engine would start dying much faster. If you leave it at idle, the engine dies slowly for a long time. So you compromise by using a little throttle to get the oil warm faster but keeping the revs and engine load low to prevent the engine from dying faster.
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Old 01-12-2011, 02:00 PM   #25
auslyle
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Quote:
Originally Posted by williaty View Post
Unless you were running substantially larger than stock bearing clearances and you had an oil pressure gauge showing you that you were making less than 10psi/1kRPM, it wasn't the oil pump's fault.

The 7mm oil pump will make 20psi/1kRPM on stock bearing clearances. That's more than enough flow.
this is true, but at high RPM's drifting drift wood for 15 min non stop might have had something do to with it. oil sloshing to one side of the block, maybe not getting back to the bottom of the pan fast enough... idk. it was brad new oil as of 200 miles before this happened.
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