Engine Knock Fresh From A Rebuild

[SchmeelDeal]

Okay, here is the problem:

'92 6-Bolt Laser RS Turbo AWD 5-Spd

The engine is fresh off of a stock rebuild, not even 200 miles. When the engine is cold, everything is fine. However, after it heats up to operating temperature, a constant loud KNOCK KNOCK KNOCK starts coming from the engine. The people at the rebuild shop have no clue what could be wrong with it now. The knock sensor has been replaced (CEL put out a code for a bad knock sensor). The car has been to Mitsubishi several times and all they say is that a rod bearing is going bad, but the rod bearing are all brand new. Both shops have checked the timing and they tell me everything there is fine. Today, the rebuild shop said that the balancer shaft belt was off by two teeth, so they readjusted it and the knock is still there. Now they are saying that it is being caused by the clutch and flywheel that I had them put in (ACT 2600 Clutch w/ Street Disc & ACT Xact Streetlite Flywheel).

Can anyone give me some insight as to what the problem could be or what to check?

Thanks,

James

 

[jfdid]

According to my engine shop, if they polish the crank, they'll put "1 thou" over/under sized bearings on it to take up the slop. The over/under, just depends on how you're looking at it.

 

[ArticNemesis]

What the hell kinda rebuild involves leaving balance Shafts in?:thumbdown

I'm still trying to figure out how the balance shaft bearing caused the crankshaft
to dig into the casing.?

 

[SchmeelDeal]

I'm still trying to figure out how the balance shaft bearing caused the crankshaft
to dig into the casing.?

That was their "official" explanation of what happened. You and I know and everyone else who read this post knows that their "official" explanation was not likely. Needless to say, the crankcase was messed up pretty bad, but I did not get to look at it for more than a few minutes. The people knew they messed something up real bad and had no idea what, so they seemed to have just made something up that sounded good to them. However, they took responsibility though and bought me another engine and this one doesn't have a balance shaft. After I got it back from them though, none of the vacuum lines were hooked up correctly, it had a knock sensor from a 2g in it, the throttlebody bolts were finger loose along with two of the transmission mount bolts. After fixing that stuff, everything seems to be a ok after 18k miles so far.