Thread: Crankshaft timing belt pulley bolt (big pics)

Ah, okay, bolt diameter, not head diameter. I understand. Regardless, i have atleast 18mm of bite on the threads... and it's torqued to spec right now (83ftlb) with the smaller 30mm bolt. Just got the pan back on, and starting in on the rest in a few minutes.

You could probe the inside wall of the hole with a piece of wire to see how deep the threads go.

I'm not sure how many of you guys have come across this particular 'issue'. I have had to repair several G13B DOHC engines that were suffering from severe retarded camshaft timing due to the crank pulley bolt being reused after a cam seal replacement. What I have discovered is that the crank gear bolt is about 1/8" shorter than the thread depth in the nose of the crankshaft, and when the bolt is first tightened...

That's a negative on it being a 17mm, that is the head size. The bolt size is a 12mm. I just zipped one out of an 89 GTi engine I have destined for my samurai and it is 12mm, 35mm long, FYI.

Someone put thread-lock on that bolt. Comes out with applying heat. Nightmare!

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What I do when I have to take the timing belt pulley bolt out is, take out one of the spark plugs and pour water into the engine, and then put the plug back in. That way the engine hydrolocks and stops it from spinning. Then just use a breaker bar. When your all done take the spark plug out and turn the engine over a cuple of times to let the water out.