67 327/300 water pump

[Enzo C.]

I wanted to ask if the bolts on the water pump have a flat or lock washer on the 4 mounting bolts? The new JM does not specify ??

[Joe L.]

Re: 67 327/300 water pump

I wanted to ask if the bolts on the water pump have a flat or lock washer on the 4 mounting bolts? The new JM does not specify ??

Enzo------


No washers at the bolt-to-pump interface. However, if a stud is used at the left upper position, there are split lockwashers used for the alternator brace but not between the stud and the pump casting.

[Enzo C.]

Re: 67 327/300 water pump

Hi Joe, I have no stud but just the 4bolts... I will remove the lock washers so will have just a bare bolt to water pump ...

[Joe L.]

Re: 67 327/300 water pump

Hi Joe, I have no stud but just the 4bolts... I will remove the lock washers so will have just a bare bolt to water pump ...

Enzo-------

While GM never used washers for the waterpump retaining bolts, they should have at least used flanged head bolts, but they never did. The use of a standard hex head bolt without washer interfacing directly with the pump casting was, in my opinion, a bad idea. But, that's what they did. Flanged head bolts would have probably cost 1/4 cent more each.