Flywheel Removal - Bolt Size
 

I have a '85 12A eingine that I am about to start tearing apart. All I have is the block and was not there when the transmission/clutch/etc., were removed. So I am not sure of the size of the bolts that go into the flywheel. Will need to bolt on a bracket to immobilize the flywheel so I can brake loose the nut. I am guessing that they are 8mm but am unsure of the thread size. Would sure hate to strip them out. Can anyone verify the bolt/thread size for me? Thanks

8mm? ha... that beast is a 52mm, unless i read your post wrong..

Im with onepointone. I had to buy a 54mm socket.

Sounds like your trying to remove an auto tranny pressure plate. More info please.

I think theyre 12mm or 14mm (heads) and a couple are shanked, just look around your bound to fine one somewhere else on the car. 54mm for the nut or 2 1/8" and an impact gun, youll never break the torque with a wrench, then when the nut is off screw it on a couple of threads and get a BFH and whack it once or twice (the flywheel).

Yes. If all else fails, just whack it with a BFH.

A really big BFH. Make sure the nut is on there or it will jump off in a hurry.

I've always used a wrench, no air tools in my garage. It's a snap-on torque wrench with 2' and 4' extensions, but it's still a wrench :)

I removed that flywheel with a air chisel. It made a small notch on it but it did no t hurt anything. After that I bought the socket for it but the air hammer thing did work.

The torque Im refering to is on the 54ml nut its torqued down to 289-362 FOOT pounds. I almost killed myself and a helper trying to break the torque, I had a 5 foot cheater pipe too. When you get to the point of ever doing this, youll wish you had air tools in your shop, its the only easy way. And you should never break torque with a torque wrench, theyre not designed for that.

I know, the 54mm flywheel nut is the one I use the bigass torque wrench for. I put my car up as high as it can go on jack stands, put on the wrench so it sticks out the side of the car. Then I brace my back against the side of my garage and push on the torque wrench with my feet. The nut comes off very easily using my legs on the wrench. I don't use the torque wrench part of it, there's a 2' extension that's just a straight bar, making the wrench about 3' long. Then there's another 2' extension that snaps onto the end of the 1st extension that's another 2' long. This piece is the one that measures the torque, but I don't use it for taking the nut off. I can easily put the nut on @ 350ft/lbs with my hands using the torque wrench too.

Torque wrenches are designed to tighten, not loosen. Get yourself a breaker bar and spare your $100+ torque wrench.

Ughhh, like I said, I don't loosen with the torque part of it. It's a 3/4 ratchet end with a 2' extension that makes it a total of 3' long. Then there's another 2' extension with the part that measures the torque that can be put on the end of the 1st extension. I only use the torque part of it for putting it on, I use my legs and teh 1st extension for taking it off.

i use a 3/4 impact (1200 fpt) with my 2 1/8" socket on the nut..... 2 or 3 whacks and off she goes... then smack it with a hammer till the tone changes

thats rubbish ... unless you exceed the set torque limit you will not damage a torque wrench undoing a bolt ... otherwise how would you torque a left handed thread ?

mike