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Cylinder Head & Short Block Cams, valvetrain, pistons, rods, stroker kits, swaps, etc. Advanced modification discussions only.

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Old 04-01-2008, 08:05 PM   #1 (permalink)
 
Registered: Mar 2007
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Yes, it took you long enough to figure out you've been had :)

Well, apparently something went a miss with my buddy's build. We're not sure what caused it yet but we will look into it a little further once he's done crying about it.

Apparently he went to start his car this morning, and it was running extremely lopey and barely at all. Plus it was making this really weird clanking noise the likes of which neither of us ever heard. He called me over and we did a compression test.

We only got a reading in the number two cylinder, and it was perfect. The other cylinders didn't get any reading at all. I thought it might have been my compression tester, as it is pretty old and I bought it from the pawn shop as I'm a cheap SOB.

Boost leak test came out good too. So, scratching our heads, we tried running the car and driving down the block, and it ran absolutely terrible. At least we made it back into the driveway, but it took us almost five minutes with the throttle absolutely floored. The car sounded like a machine gun, I swear.

So, since I had some time on my hands, I helped him remove his head so we could further investigate and this is what we found.

To be honest, neither of us understand what's going on. All his internals look absolutely perfect. We see no signs of detonation, nothing bent or missing, all fluids topped off.

You guys look and tell me what you think. Personally, we're banging our heads on the wall with this.


http://i188.photobucket.com/albums/z...3/PICT0315.jpg

Any and all thoughts would be immensely helpful.

WANTED

Last edited by WANTED; 04-02-2008 at 05:47 PM.
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Old 04-01-2008, 08:25 PM   #2 (permalink)
 
Registered: May 2007
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Picture don't work...

And it sounds like a spun bearing.
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Old 04-01-2008, 08:37 PM   #3 (permalink)
 
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Here's the picture.

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Old 04-01-2008, 09:20 PM   #4 (permalink)
 
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Well the first problem I can reasonably guess is that the pistons are way out of whack. Unless I'm way off don't most 4-cyl. stroke the 2 and 3 piston at the same time while 1 and 4 are 180 degrees out? Having three pistons at TDC and one at BDC would cause a severe rotational vibe.

Put a large ratchet on the crank pully and turn the motor over by hand. Also may want to pull the oil pan...got a sneaking suspicion that one or more of the rods has become disconnected from the crank.
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Old 04-01-2008, 09:28 PM   #5 (permalink)
 
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Quote:
Originally Posted by Evolvd View Post
Well the first problem I can reasonably guess is that the pistons are way out of whack. Unless I'm way off don't most 4-cyl. stroke the 2 and 3 piston at the same time while 1 and 4 are 180 degrees out? Having three pistons at TDC and one at BDC would cause a severe rotational vibe.

Put a large ratchet on the crank pully and turn the motor over by hand. Also may want to pull the oil pan...got a sneaking suspicion that one or more of the rods has become disconnected from the crank.
Agree.
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Old 04-01-2008, 10:43 PM   #6 (permalink)
 
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I can't see the pics, but if you've got 3 pistons at TDC you've got some serious issues..
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Old 04-02-2008, 08:26 AM   #7 (permalink)
 
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April 1st?
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Old 04-02-2008, 08:50 AM   #8 (permalink)
 
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Quote:
Originally Posted by Evolvd View Post
Well the first problem I can reasonably guess is that the pistons are way out of whack. Unless I'm way off don't most 4-cyl. stroke the 2 and 3 piston at the same time while 1 and 4 are 180 degrees out? Having three pistons at TDC and one at BDC would cause a severe rotational vibe.

Put a large ratchet on the crank pully and turn the motor over by hand. Also may want to pull the oil pan...got a sneaking suspicion that one or more of the rods has become disconnected from the crank.
Agree Take some pictures of the crank for us. with the oil pan droped. Thanks

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Old 04-02-2008, 10:54 AM   #9 (permalink)
 
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I'll try. I don't have much free time right now, so it will take me a little while.

Could this have been caused by the fuel he was trying to run? He mentioned something about biodiesel to keep the engine temps down.
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Old 04-02-2008, 11:36 AM   #10 (permalink)
 
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Originally Posted by WANTED View Post
I'll try. I don't have much free time right now, so it will take me a little while.

Could this have been caused by the fuel he was trying to run? He mentioned something about biodiesel to keep the engine temps down.
?? Biodiesel??? Not good
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Old 04-02-2008, 12:31 PM   #11 (permalink)
 
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Originally Posted by WANTED View Post
I'll try. I don't have much free time right now, so it will take me a little while.

Could this have been caused by the fuel he was trying to run? He mentioned something about biodiesel to keep the engine temps down.
Unless he is tuned for that and has the right fuel system to run it then YES. that could have something to do with it.....

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Old 04-02-2008, 12:32 PM   #12 (permalink)
 
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I made the power listed under my name on Biodiesel.. I can't see that being the problem.
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Old 04-02-2008, 12:42 PM   #13 (permalink)
 
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You mean e85 is biodiesle?? I thought they were 2 different gases..
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Old 04-02-2008, 01:04 PM   #14 (permalink)
 
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I made the power listed under my name on Biodiesel.. I can't see that being the problem.
Yes Justin it doesn't hurt but you do need the tune and fuel right other wise something bad could happen right?

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Old 04-02-2008, 01:56 PM   #15 (permalink)
 
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Just out of curoiusity, what kind a/f do you tune for when running it? He was running 16/1.

So, I pulled the engine, dropped the oil pan and found this. I didn't remove anything else at all, internally. Everything looks pretty clean to me, although the crank nearly landed on me when I dropped the oil pan. Is it supposed to do that??

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