Small cracks in flywheel GQ 4.2 Diesel

Submitted: Wednesday, Oct 27, 2004 at 20:51
ThreadID: 17365 Views:2532 Replies:4 FollowUps:0
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I'm in the process of changing the clutch in my GQ Diesel. The machined part of the flywheel where the clutch pressure plate goes against has quite a few small radial cracks about 20-30mm long. Has anyone come accross these and does it mean a new flywheel or can I just put the new clutch in? Apart from the cracks theres no scoring etc. The manual says that the "flywheel should be replaced if excessively cracked or scored" - this could mean that its not machineable?
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Reply By: ColinD - Wednesday, Oct 27, 2004 at 21:00

Wednesday, Oct 27, 2004 at 21:00
Small cracks are normal. I would only be concerned if there is large cracking and/or blueing/heat marks as this can cause shuddering. It is a good idea however, now that they gearbox is out, to have the flywheel lightly machined to give the new clutch a fresh surface. Ask the machiner to leave a small witness mark. (A faint line of untouched material showing that only the bare minimum of machining was carried out, you would rather wear the flywheel out than have it turned into metal fillings).........Dont squash yerself.........................col
AnswerID: 81995

Reply By: duncs - Wednesday, Oct 27, 2004 at 21:20

Wednesday, Oct 27, 2004 at 21:20
I'm with Col on this one. The hard part of the job is getting the gearbox out. While it is on the ground do every job that you need to take it out for. Get someone who knows what they are looking at to check the flywheel for you. It would be a real pain to put it all back together only to have to take it apart again a week or even a month later.

Duncs
AnswerID: 82002

Reply By: 80scruiser - Thursday, Oct 28, 2004 at 08:55

Thursday, Oct 28, 2004 at 08:55
I agree with all the others.
Get it machined. I only charge $37.73 retail for a machine. For that sort of money its peace of mind you know you won't have any shudders.
They are a cow to get the box out so you don't want to have to do it twice.
Besides the manufacturer won't cover any warranty claims if there is a problem if you haven't machined the flywheel.
Best of luck with getting the box out and back in.
AnswerID: 82039

Reply By: Andrew from TrekTable - Friday, Oct 29, 2004 at 20:54

Friday, Oct 29, 2004 at 20:54
Mark,

Are you planning to put the box back in on your own? By hand?

It's a very heavy box so take care. Perhaps have a mate come over to help if possible. I lifted mine with a trolly jack but still had alot of trouble. A 2nd person would have definately helped.

Tell us before you start putting it back in and if we don't hear from you in a day or two we'll alert the authorities!

Andrew
AnswerID: 82264

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