Flywheel step accuracy very crucial ?

[relaxedcruiser]

Hi all,
had a bit of a disappointing day today - got the flywheel machined - but instead of the agreed 0.5 mm / 0.197 in. step
I measured only 0.36 mm / 0.0141 in
Unfortunately I had to travel about two hours one way to that shop as the local engine builder is already in christmas mode and was not available. I don't want to do that trip again.
Probably not the best time during the year to do such things - but that's annother story and there is a reason behind it.
So I'm a bit stressed - being a fussy type type of mechanic I really want to have things as per the WSM and that is 0.5 mm bang on - and not more or less.
But in the real world, the status is now like a each side 0.07 mm / 0,0027 in worn clutch plate. Not much at all.
I really think that between different clutch manufacturers, the standart thickness of a clutch plate varies probably in that range if not more.

So to stress - or not to stress - and just get that thing with the all nice and shiny new Exedy HD clutch back together ? Otherwise I would just get that flywheel on a lathe and machine those missing 0.14 mm / 0.055 off for peace in mind.
The HD pressure plate will probably make easily up for the lost preload.... so I'm between those decisions...

What are your thoughts ?

 

[relaxedcruiser]

In my slightly tired state I used a precision straight edge and new feeler gauges to measure - and I was wrong - it is even worse.
With the dial gauge it is only 0.29 mm / 0,0114 in

 

[aztoyman]

I'd call the shop that did it first. Is the loss of your time harder for you than this eating at you?

IDK how much this would be noticed if you install it as is. If it is a problem, that will be a lot more time than taking it back now to make it right.

Maybe the shop will compensate you somehow for his mistake??

Good luck with whatever you decide.

 

[relaxedcruiser]

Shop guy is saying that I'm probably not measuring accurate enough. And he was right - but it is even worse with the dial gauge - I should have taken that with me and check on the spot - you are always wiser afterwards.
I'll try a local machine shop tomorrow, they have a good lathe - and he should hopefully be able to skim that 0.2 mm 7.9 thou of the step. The surface will be slightly less shiny - but should be good enough to mount the pressure plate.

 

[Eyeorg]

I cant event seem to get the flywheel off. Any tricks to getting it off? I cant seem to get it from not turning even when I try to lock it out with a prybar

 

[Eurasiaoverland]

I cant event seem to get the flywheel off. Any tricks to getting it off? I cant seem to get it from not turning even when I try to lock it out with a prybar

Put a breaker bar on the crank pulley bolt. You can also put a bolt in the back of the block and either wedge a small socket between it and the flywheel teeth, or a big flat-bladed screwdriver. But the bar on the crank bolt method is preferable.

 

[Eyeorg]

Put a breaker bar on the crank pulley bolt. You can also put a bolt in the back of the block and either wedge a small socket between it and the flywheel teeth, or a big flat-bladed screwdriver. But the bar on the crank bolt method is preferable.

Crank pulley bolt. Thats in the front of the engine right? So maybe that breaker bar is then wedged against something while I am on the backside yanking the other direction?

 

[relaxedcruiser]

Tie that bar with something to the best point, probably the chassis. or use a rattle gun to get them off. But for torqueing them back up you need that setup anyway - or a second person who is holding it against the hard point.

 

[Eyeorg]

Tie that bar with something to the best point, probably the chassis. or use a rattle gun to get them off. But for torqueing them back up you need that setup anyway - or a second person who is holding it against the hard point.

Thanks for the tips