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Topic: What size are the water pump pulley bolts for a 3.8L? (Read 1065 times) previous topic - next topic

What size are the water pump pulley bolts for a 3.8L?

During my earlier clutch fan debacle I ended up ruining a set of WP pulley bolts and installing a flex fan with a spacer on my Thunderbird. Anybody happen to know the thread size of the bolts? I know the head is 1/2"(the originals were 7/16") and they are fine thread. I'm lazy and would rather not have to get cut up taking the bolts out only to measure them and throw them back in. I need the size so I can run shorter bolts when I install my electric fan.

Re: What size are the water pump pulley bolts for a 3.8L?

Reply #1 –
I have a old water pump out of my '84 3.8.
The bolt holes in the  are 5/16-24.
Check it with a tap.

Re: What size are the water pump pulley bolts for a 3.8L?

Reply #2 –
of course an 84 would be standard thread but in 87 and up  they should all be metric but I dont know.
One 88
 

Re: What size are the water pump pulley bolts for a 3.8L?

Reply #3 –
Quote from: softtouch
I have a old water pump out of my '84 3.8.
The bolt holes in the  are 5/16-24.
Check it with a tap.

Many thanks!  :)