924Board.org

sciroccosteve · Joined: 16 Apr 2012 Posts: 215 Location: Rochester, NY

my buddy has a stubborn crankshaft bolt that will not budge. motor out of car for rebuild anyways, SO

Does anyone happen to know if a crank from a 77/78/79/etc... will work in the non turbo block from 81?

Myself, I assume there would be no issues with existing connections rods/pistons.

Just want to double check with you guys
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1979 924
2000 V6 Passat
"Let the fools have their tar tar sauce."
C. Montgomery Burns

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Acetylene?

Check the parts catalog, I think the very early rod journals were smaller, but the rest are identical.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

MikeJinCO · Posted: Wed Mar 01, 2017 11:57 am Post subject:

One of the old school methods to break loose frozen bolts is to touch the end of the bolt with an arc welder and let the current do the work.
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Mike

'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

All cranks and rods are interchangeable except for the very early 1976 Euro models, and something like the first 12 or 15 1977 models imported to North America.

That said, I'm guessing that the washer between the bolt and the nose of the crank is your problem. You can use a cutoff wheel or a drill to very carefully remove some of the washer material in order to relieve the torque pressure that is currently on the head of the bolt. I had to do this once.

Before you try that, I suggest getting a big ass rattle gun that is rated for 900 ft lb. If you don't have one, find someone who does who will let you borrow it. I have one, and it hasn't yet met its match. Some PB blaster and heat ahead of time may help persuade the bolt to let loose, and this will help you avoid sacrificing the washer.

If you do end up having to remove material from the washer, just do so with care so that you don't cut into the bolt itself. It would be better not to have to replace that.
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erstwhile owner of just about every 924 variant ever made

Johnparmenter82 · Joined: 11 Sep 2016 Posts: 12 Location: Rochester, new york

hey guys, this is my car. steve posted it for me. Thanks for the input. Im going to try these ideas asap
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Johnparmenter82