About two weeks ago I built my evo ix motor, everything I installed on it was brand new. A few days passed and it started giving me problems, the car would shut down when I pressed the clutch or the idle drops really low, I at first thought that the car needed tuning, So I got the tuner take a look and after he was finish I was still having the same problem. So the next stop is the mechanic, first step was to determine the cause of this, starting with the clutch setup I'm using the new Quarter Master 7.25" 8 leg twin disc, he checked the clearance of the Hydraulic Release Bearing he thought that he had used to many shims or that he should of installed a pedal stop but this wasn't the cause of my problem. Next he had me press in the clutch while he was still under the car in doing so he saw the crank moved so after seeing this he proceeded in pulling off the sump and he saw One of my thrust washers was destroyed and the other one fell off..


Does anyone know what could of caused this that soon? The motor had only 30km on it without boost

Can the clutch, Master Cylinder cause this? I want to know because I'm about to put in another motor and I don't want the same thing to happen to this one. Any input will be helpful!

 

The clutch and the master cylinder is what caused it. I am assuming you know how a clutch works, correct?

 

more likely that the thrust washers were installed backwards when "they" put the engine together. Check the thrust washers for wear, there should only be wear (if any) on the face with the two little indents on it.

 

I would take the rubber cooling boot on the front side of the transmission and look at your flywheel assembly. Either that or jack the car up and pull the boot to inspection cover to see if the pressure plate is backing out.

I've seen this before and was because the clutch assembly was coming apart and the flywheel was rubbing against the trans case a little.

 

Pressure plate is too fierce, putting too much pressure on the crank, the crank is binding to the trust washers.

 

The pressure plate can cause this. A lot of us have removed the clutch start switch so that you wont have to start the engine with no oil and a whole lotta pressure on the thrust bearings.

 

Eagle brand cranks and improper clearanced hydraulic release bearing are top causes. The motor is probably doa now and if the crank hits the girdle then the block is no longer useable.

 

How is a HRB supposed to be properly set?
Is this most common with push style clutches?

 

It's not supposed to be touching the pressure plate fingers when you install the transmission, there has to be a gap in there.

 

did you use the shims that came with the quarter master if so i think that's where your problem started i read somewhere that you don't need to shim the HRB.....

Just my 2cents

 

+1

 

the thrust washers were installed correctly and the HRB clearance is correct

 

That sucks. But yes, I've seen it before with engines other people have put together. I guess no one reads the manual anymore and measures anything anymore.

 

Why is the crankshaft moving when you press in the clutch then?

Normally when there is excessive crank walk, the trigger wheel smashes into the crank sensor pickup and that stops the car from running.

 

I have only seen this happen when the thrust bearings were installed backwards