11 replies to this topic

[Blatherskite]

I'm trying to get the flywheel off our SPi, and before I do, I wonder if there is a certain position it should go back on, so the crank position sensor knows TDC for cylinder #1 - in other words, do I need to scribe any marks? Or, does it only fit on the crankshaft in one podition? I would hate to get it all back together & find that it has to come apart again... Would appreciate some guidance here!

[Guess-Works.com]

They only fit in one place correctly.. The keyway across the end of the crank is offset as is the corresponding keyway in the flywheel/clutch, make sure this is correctly lined up and you will not have a bother with the timing.

 

Also if  you're changing the clutch, make sure you get one which is specifically for the injection and not just a standard one as this WILL mess up your timing.

[Blatherskite]

They only fit in one place correctly.. The keyway across the end of the crank is offset as is the corresponding keyway in the flywheel/clutch, make sure this is correctly lined up and you will not have a bother with the timing.
 
Also if  you're changing the clutch, make sure you get one which is specifically for the injection and not just a standard one as this WILL mess up your timing.

Aha! Hoped that was the case. Thanks for the heads-up on clutch.

[Blatherskite]

They only fit in one place correctly.. The keyway across the end of the crank is offset as is the corresponding keyway in the flywheel/clutch, make sure this is correctly lined up and you will not have a bother with the timing.
 
Also if  you're changing the clutch, make sure you get one which is specifically for the injection and not just a standard one as this WILL mess up your timing.

Just put the flywheel & clutch in the car, and it fits both ways round! The keyed washer is symmetrical... But I talked to someone who knows injection systems and he said that the crank position will indicate rotation and rpm, and the dizzy sorts out the ignition. Or did I miss something here? I didn't torque the flywheel on in case... and there's nothing in Haynes that helps with one way round or not.

[Guess-Works.com]

The keyway is NOT symmetrical, however, with the engine in the car it can be difficult to tell.... Use a Mirror so you can see the crank end on.

 

If you put the clutch/flywheel on 180 degrees out then it'll not start

Edited by Guess-Works.com, 25 October 2015 - 07:58 PM.

[Blatherskite]

Thanks. Mirror time!

[brivinci]

When refitting, should the wheel be lapped onto the crank as good practice?

[Guess-Works.com]

Ideally, yes, but with the engine in the car you need to be very careful to lap the whole taper and not just run the flywheel round while it's weight is supported on the top of the crank..

[brivinci]

Very good point. Did mine out of the car. Maybe one could lap a bit, rotate crank, lap some more... Or, just pull the motor and do it right:-)

[xrocketengineer]

Very good point. Did mine out of the car. Maybe one could lap a bit, rotate crank, lap some more... Or, just pull the motor and do it right:-)

I did that too. I also put some WD40 on the taper and the wiped it off to reduce the friction when installing the flywheel. I also put some WD40 on the centre bolt threads.

Edited by xrocketengineer, 27 October 2015 - 12:31 AM.

[CarsOrBikes]

The keyway is NOT symmetrical, however, with the engine in the car it can be difficult to tell.... Use a Mirror so you can see the crank end on.

 

If you put the clutch/flywheel on 180 degrees out then it'll not start

My Rover dealer did this!! What a story, too long for here, unbelievable.

[Blatherskite]

The keyway is NOT symmetrical, however, with the engine in the car it can be difficult to tell.... Use a Mirror so you can see the crank end on.
 
If you put the clutch/flywheel on 180 degrees out then it'll not start

With some embarrasement about the delay, I followed your advice. Although no mention in Haynes, there is indeed a difference. Naturally, has the flywheel 180 degrees out, so pulled off & reset. The taper is so clean the flywheel had set itself on the crank, so out with the puller... Looks good so far!