Did you use Loctite when you installed them? Also some folks use safety wire, like this guy:

http://forums.ctzcc.com/viewtopic.php?p=12805

(just scroll down a bit)

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280zx NA to T... http://z.modeltrainguide.com

I think somebody else had loose flywheel bolts a year or two ago, and I also seem to recall seeing a photo of a flywheel with all the bolts safety-wired together to keep that from happening again. Might have been AJ, but it was so long ago I don't recall now.

Well, that pump was up to no good and would eventually have caused damage to your engine, so it's good that it was replaced, anyway. I just hope the movement didn't elongate any of the bolt holes, or stretch the bolts.

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1970 240Z

Thanks for the input. When I rebuilt the engine a few years ago a friend persuaded me to use Red loctite. Of course I later needed to replace the rear seal and ended up having to use a blowtorch to get the bolts out...so I don't recommend Red on flywheel bolts.

Reusing the old bolts prob contributed to them loosening So I'm going to get new bolts at the dealer, use Blue loctite, and spend extra attention on torquing them properly. Should have done it right the first time.

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Bryan Little
Datsunzgarage.com

1970 240Z - enhanced F54 L28 w/P90, Weber DCOEs, 4:11 R200, Nissan T5 5-speed

Actually you are very lucky indeed! having a flywheel and clutch assembly sheer off at high rpms is no joke, there is real potential for serious bodily damage there. Back when I was a teenager, I knew a guy who nearly lost a foot when he was a passenger in a car that had the clutch fly apart.

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71 on a rotisserie, two more in pieces in my shed...and a 69 1600 waiting for me to get to it

As Mark said, it ain't funny when a flywheel or clutch lets go. I've never
had it happen to me personally, but I've seen it happen. It reminds me
of shrapnel from incoming artillery/mortars/rockets/grenades in Viet
Nam. That's how the famous drag racer Don Garlits from Tampa, in his
Swamp Rat rails, lost part of a foot exactly as Mark explained. My former
brother-in-law was luckier. That's why they use scatter shields.

(I have one for a SBC, are you interested, Clive?)

All Z Best,..............................Kathy & Rick

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All Z Best,.......Kathy & Rick

1969 Z.CAR (#00013 10/69) 8/30/76
1969 ITSA.Z (#00171 11/69) 8/24/73
1970 OLD.Z (#06289 6/70) original owner
1971 510 2dr since 12/31/75
1969 1600 rdstr (our 160-Z)
1971 (#19851 1/71) sold
1975 75.Z (#01343 1/75)

Both Clay and I have safety-wired flywheel bolts. I'm going to loctite mine in this time as well. Can't go wrong with that method, and a scatter shield (which I'm also building).

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-Chris