21 replies to this topic

[bpirie1000]

How deep on the crank does the scoring go?

Just aswell you decided to take out the engine.....

Been on there dry for some time...

[imack]

What is that build up of white powdery material between the bushes in the primary gear? It doesn't look like debris from the crank or bushes. Looks like dried up white grease.
That front bush looks extremely dry, there should be some engine oil in there to lubricant it, which then escapes back to the engine via the drillings between the front and rear bushes.
Not very clear in the photo, but is the primary gear thrust washer fitted the right way round? Looks like the chamber might be facing the primary gear rather than the crank. Also, has the thrust washer got the 4 grooves either side of it?

Edited by imack, 19 December 2024 - 06:20 PM.

[Sharks]

How deep on the crank does the scoring go?
Just aswell you decided to take out the engine.....
Been on there dry for some time...

Not sure yet - the engine isn't out, it's still in the car. I'll stick the Wok and engine mount back on, then pull the body off the subframe this weekend. Will keep you updated once I have the engine upside down and the gearbox off. It's certainly bone-dry. Probably done a good chunk of the last 20,000kms with no oil. The rear bush from the primary gear is pretty solid on the crankshaft.

 

 

What is that build up of white powder...Looks like dried up white grease.
That front bush looks extremely dry, there should be some engine oil in there to lubricant it...
Not very clear in the photo, but is the primary gear thrust washer fitted the right way round? Also, has the thrust washer got the 4 grooves either side of it?

There was no white grease in there, though I did liberally apply engine oil when the primary gear went on. Evidently that's cleared away from the front bush and not been resupplied from the back.

The thrust washer is fitted the right way around, I'm sure of that, though it has no grooves - I noticed that when I bought it. I thought it was odd as it was different to all the old ones I have here, but I didn't think too hard about it. Maybe I should have.

I tried to take it out to get a picture for you, but I can't get my fingers in there with the engine in situ. Will have to wait until I take the flywheel / drop gear housing off.

[imack]

I'd always presumed that the grooves/slots in the primary thrust washer were to aid lubrication to the primary gear bush, but I may be wrong.

[Spider]

I'd always presumed that the grooves/slots in the primary thrust washer were to aid lubrication to the primary gear bush, but I may be wrong.

 

With the crank and gear spinning, any oil that might happen to drip down that way will only centrifuge out through the slots.

[GraemeC]

 

 

The rear bush from the primary gear is pretty solid on the crankshaft.

 

Are you sure - it looks pretty much in the primary gear to me.  Are you confusing the step in the crank for a bush?

[Sharks]

Could be, Graeme - in our devastation we might not have considered that.

 

I have got the subframe out tonight, should have the engine and box split by this time tomorrow. Will put up some photos then.