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Water pump bolts?
Posted: Sat Sep 25, 2021 8:50 am
by Averjoe
Which holes have the short bolts?
Re: Water pump bolts?
Posted: Sat Sep 25, 2021 1:42 pm
by joatmon
I don't know.
However, if there are two of one length and four of a different length, then maybe this pic from a 2003 1ZZ manual will help
- wpb.jpg (62.07 KiB) Viewed 4923 times
Re: Water pump bolts?
Posted: Sat Sep 25, 2021 4:54 pm
by ColonelPanic
I did this job just last year but I sadly I can't recall what went where. Pretty sure I just arranged them in the order they were removed to save me a bit of a headache.
I used the Aisin pump, which apparently according to this
Amazon review, there was a misprint in the TSB included with the pump that explains the design change. Seems like the bolt locations noted by the reviewer there match what the GM manual is showing.
Re: Water pump bolts?
Posted: Mon Sep 27, 2021 9:10 am
by zbyers
I also insert the bolts into their location on the new water pump. Once the old WP is out, I transfer them to that as a template.
IIRC, it seems hit and miss as to whether or not you have different length bolts. The diagram joatmon linked looks like what I think I did on a water pump a couple years back.