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XSFTLBS
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PostSubject: Well, thats all folks.   Thu Nov 03, 2011 2:44 pm

The motor in the Camaro is SHOT. With the serpentine belt off, I can move the crank pulley (which itself is tight) up and down about a 1/2 inch. It has no in and out play, but the vertical play tells me either a main cap is busted or the bearings are completely gone. Id like to thank whoever thought it would be a good idea to throw the stock weighted flexplate back on the car when the motor was put in. This likely caused the failure. I guess I found it and corrected it too late.

Its going away for the winter, and I have no idea what Im going to do. Its at minimum going to need a crank, mains, rod bearings and god knows what else. I think im in shock right now, it hasnt sunk in yet.

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:08 pm

Why would the stock flexplate ruin a motor?

That sucks. Did it make any odd noises or anything that would have tipped you off to their being a problem with it? Maybe the damage is all to the bearings and that's all you will need
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:26 pm

No, nothing wierd or at least different than it had been since I bought it. Until the other day. The stock flexplate has a large weight welded to it, so on an internally balanced motor, the stock flexplate causes a large ammount of vibration on the crank. That equals premature bearing wear. The front main cap must have been the weak point. ALL the vibration went away when JD put the stock flexplate on after it had been balanced. It was just too late in the game apparently. Im hoping it just needs beatings, but theres no way to tell until its torn down. Im hoping the pistons didnt wobble too much in the cylinders, but if a main bearing spun or a cap broke, its going to need a new crank for sure.

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:30 pm

Oh okay, I wasn't aware they were originally externally balanced. If it's not knocking you may not have spun bearings. There is still hope.
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:31 pm

That sucks man. Here's to hoping it's just bearings!
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:34 pm

Put a rotary in it.

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:35 pm

^ ya great idea , you would fit in the guide lines for here at wist.......

slower, and ricey
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:50 pm

HAHAHAHHAHAHAHHAHAHAHHAHAHAHAHAHAHHAHAHAHAAAAAAAAAAAAAHAHAHAH

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:51 pm

Sorry to hear.

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:53 pm

If you can move the crank up and down a 1/2", it for sure spun more than one bearing. Bearing shells are usually less than an 1/8" thick. Even if the bearings were totally gone, you still wouldn't have a 1/2" of radial movment. The block or crank or both are worn. I remember working on that car a couple summers ago and on the test drive after, I went to wot in a secong gear pull and let out at 5k because that thing vibrated so bad. Surprised it lasted this long.
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:55 pm

^ Ruh row. I missed the part where he said 1/2"

I would start looking for a good used shortblock.
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:58 pm

240sxguy wrote:
^ Ruh row. I missed the part where he said 1/2"

I would start looking for a good used shortblock.
I have some Chevy short blocks sitting around for cheap lemme know if ur interested. One is a full 355, could use a going through. Also got late 80's 4 bolt 350. Lemme know if ur interested.


Last edited by 91tsi on Thu Nov 03, 2011 3:59 pm; edited 1 time in total (Reason for editing : i suck at typing)
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 3:59 pm

Nope, sorry to tell you this, but Kevin, isn't is done. The improper flexplate, puts excessive on pressure of the thrust bearing. Once that goes. It is like pinballs in there Surprisingly, you didn't see a loss in oil pressure. Sorry Kevin. I'm guessing it is at least crank, rods, clean and hot tank the block

Mike

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 4:01 pm

Put whatever engine nightrunner06 has in his car in your car blackout, I'm sure it will be fast and awesome!




OK, I'm done stirring the bee's nest. Wink

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 4:03 pm

^ it wouldn't fit Very Happy
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 4:04 pm

32vApe wrote:
If you can move the crank up and down a 1/2", it for sure spun more than one bearing. Bearing shells are usually less than an 1/8" thick. Even if the bearings were totally gone, you still wouldn't have a 1/2" of radial movment. The block or crank or both are worn. I remember working on that car a couple summers ago and on the test drive after, I went to wot in a secong gear pull and let out at 5k because that thing vibrated so bad. Surprised it lasted this long.

I'm glad you said it, I figured he probably didn't want to hear it from me.
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 4:10 pm

Sorry 1/2 might be overestimating it a bit. I was really upset at the time. Its probably close to an 1/8th of play, no in and out play. Im pretty sure the crank is fucked, but im hoping the block is okay along with the Ibeam rods. This is only my second V8, ive always owned 6s and 4s, and NOTHING with a big Cam. So in all reality, I didnt know how it was supposed to act or feel. Now I know. LOL. My first V8 was an athsmatic 4.2l in an 84 eldorado, so my referance point is skewed.

I know one thing though, every bolt on that motor is getting a torque wrench put on it when its fixed. I dont trust that something else didnt vibrate loose.

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 4:24 pm

Its wierd, oil pressure was and still is great, the exhaust note is fine.... it went down the road like normal, it just make a wierd rattle from the front. It didnt even sound internal. This started two days ago. It doesnt knock at all, other than that wierd rattle in the front, it was all normal. Regardless, its got to come out now.....

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 4:48 pm

you'll have the whole thing torn down anyway, so a torque wrench on assembly is a must. If there is only an 1/8" of play it may not need a crank or block. You can turn the crank down .010" and get undersized bearings. Then the block can be lined honed. If there is no in and out movment the rods and pistons are probably ok. With proper balancing, it should rev smooth as butter to at least 7k if the valvetrain could support it.
Time for a ported lt4 topend.
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 5:07 pm

^ Yup. Apparently the heads and Intake WERE ported stock stuff though. If its being torn apart, I'll get the heads and intake to a flowbench to see whats really up. If I can see a gain from LT4 stuff, then so be it. All new gaskets, proper torque on fasteners... no more oil leaks.... We'll just see if the pocketbook can support a rebuild. Sad

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 5:27 pm

Just put an LS in it!
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 5:33 pm

Thats DEFINITELY not in the budget. LOL

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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 6:27 pm

Just buy my motor and run it on E85
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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 6:32 pm

LOL

I need a motor to run on real gas first, before I delve into the voodo that is E85!


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PostSubject: Re: Well, thats all folks.   Thu Nov 03, 2011 6:44 pm

Put it in and run it what's the problem?
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