Crankshaft pulley bolt size?

[BITESIZE]

What is the size of the bolt for the crankshaft pulley. On majestic honda there is a 12 mm and a 14 mm. It's for a 1988 A20A3 block. My engine in my car has a 19mm bolt? Wtf? Is the head on the bolt just 19mm? So I need to know which one to order? Should I just see if a regular 12mm/14mm bolt will go in or what and determine the size?:rant:

[BITESIZE]

So I tried a regular 14mm bolt, and it was way lose? Is it a 19mm bolt?

[SteveDX89]

Why do you need a new one? Just reuse the one you have.

[BITESIZE]

I didn't have one on the spare block that i'm rebuilding....I'm driving around with my real engine in my car....:)

[AZmike]

Bolts aren't measured by their heads. They are measured by the outside diameter of the threaded section. Your '14 mm' was probably more like a 10 mm.

[BITESIZE]

I'm thinking it's a 14mm then...what's your opinion?

[SteveDX89]

I didn't have one on the spare block that i'm rebuilding....I'm driving around with my real engine in my car....:)

Hmm. I didn't know you were doing this on a spare. :slap: I would say go to a hardware store and buy a M12X1.25 and a M14X1.25 bolt. They should only be a few cents. See which one threads into the hole and then you'll know.

[BITESIZE]

That's probably what I'll do!