End Play and Turbos

[simbey1982]

Hey all i have the EJ22T torn apart and the heads are off. They are being taken to get resurfaced and leak tested. I got the engine out and everything off. I have a couple of questions

 

1. The flywheel has about 1/8" of play which translates to the main pulley in front. In other words when i push and pull on the flywheel i have 1/8" of play in my shaft....is that a main bearing going and if so is it that much more difficult to get to since im already at the shortblock stage?

 

2. My headgaskets did not look blown....is it even possible that the oil and coolant are mixing in the turbocharger somehow?? is there anywhere else they cross paths?

 

PS i did not have tell tale headgasket signs...no overheating etc just lots of oil in the coolant....

 

Cory

[Nug]

To really quantify the amount of wear, a dial indicator should be mounted so the amount of movement can be measured. Some movement is considered normal. I don't know the specifications in this case.

 

This movement is an indication of thrust bearing wear. Thrust bearings are usually formed as part of one of the main bearings. You would have to split the case to replace them.

 

Thrust bearing wear can be aggravated by riding the clutch, excessive pressure plate spring pressure (like in some racing clutches), and in the case of automatic transmissions, torque converter ballooning from damaged/crimped cooler lines.

 

In the case of watercooled turbos, yes, it is possible, but i haven't heard of this happening.

[audio_file]

another cause of the dreaded "coolant/oil mixture" can be bad intake manifold gaskets . . . might as well replace those anyway for $3-5 while she's on the operating table

 

chris

[simbey1982]

Ill replace those gaskets too...any more info on the end play??? Normal? something to be worried about?

[Nug]

You really need to measure it.

[Quidam]

  simbey1982 said:

Ill replace those gaskets too...any more info on the end play??? Normal? something to be worried about?

 

Nug said it, measure it. A casual glance at a Chilton, 2.2 Subaru.

 

Crankshaft end play:.0012 to .0045. Thrust on #3.

 

Doug

[Gloyale]

  audio_file said:

another cause of the dreaded "coolant/oil mixture" can be bad intake manifold gaskets . . . might as well replace those anyway for $3-5 while she's on the operating table

 

chris

 

He'll need those anyhow with he heads off. But actually EJ intakes carry neither oil or coolant, so there's no way intake gaskets could cause that on an EJ.

 

Even EA intakes which carry water, have nothing at all to do with the oil, so intake gaskets on any Soob wouldn't produce oil in water, or water in oil.

 

Intake gaskets on EA can allow Coolant into combustion chamber, but not into oil.

 

 

1/8th inch endplay seems a bit much, but measurement is needed.

[audio_file]

  Gloyale said:

Even EA intakes which carry water, have nothing at all to do with the oil, so intake gaskets on any Soob wouldn't produce oil in water, or water in oil.

 

Intake gaskets on EA can allow Coolant into combustion chamber, but not into oil.

 

respectfully . . .

my experience tells me otherwise . . . with my EA82 carbed engine the intake manifold gaskets were allowing coolant to drain into the combustion chamber-and it's not impossible to imagine the water getting past the rings (or being compressed past a valve ) and into the oil supply, which is what happened to me, i had to change the oil after i was done with the gaskets (because it had coolant in it) which wouldn't have been necessary based on your comments above . . .

 

i stand corrected on EJ's however, i haven't been that deep into one myself . . :-\

 

chris

[Nug]

Well, in lieu of measuring endplay, I can offer this: .0012 to .0045. is not a lot. If you can actually see the crank move, then the thrust bearing is probably worn out.