BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
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 waterpump replacement

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Posts : 372
Join date : 2011-02-03
Age : 42
Location : brockton

PostSubject: waterpump replacement   Mon Aug 20, 2012 7:29 pm

I'm going to replace the waterpump and seals on the purpala. I've never actually replace one on a LT1.
Any surprise's?
...prior encounters?
..bitch session's?
...nightmare stories?
I won't be replacing it at home.
My toolbox, jack, stands etc are @ my grandmothers 45 mins away!

Last edited by mikiehews on Tue Aug 21, 2012 8:52 am; edited 1 time in total
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Club President

Posts : 6878
Join date : 2009-01-20
Age : 41
Location : East Hampstead, NH USA

PostSubject: Re: waterpump replacement   Mon Aug 20, 2012 8:27 pm

It's pretty easy and straightforward. A flathead screwdriver, deep 9/16 and a couple extensions is really all you need to do the job. there are SIX bolts holding the water pump on. Wink

Remember to swap the drive coupler over to the new pump!

Oh, and remove the upper hose and thermostat housing as one piece.

And I usually fill it back up with coolant mix through the water pump to make bleeding the system easier. Fill it to the top, pop in the thermostat and then hook up the upper hose/thermostat housing.

Bill "The Verb" Crovo - Resident Car Slut & Unicorn Hunter

A Toasted Marshmallow, A Long German, A Lame Suburban and expensive dreams...
Missing all my previous B's, D's and V... Sad
American Ricer
"Ooooh! Look! Something shiny!"

LOWER IT!!! Wink
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Posts : 4253
Join date : 2009-12-16

PostSubject: Re: waterpump replacement   Mon Aug 20, 2012 9:00 pm

Easier with the AIR pump out of the way Arrow . Maybe change the opti while you are there and got the $$. Be careful, these cars are tricky. My water pump swap started 4 months ago, and the car tricked me into basically rebuilding, cleaning, and rust proofing almost everything forward of the windshield while i was there lol. She's a sly devil. I didn't use rtv tho. The gasket are holding up good so far by themselves. To each his own.
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Posts : 4287
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: waterpump replacement   Tue Aug 21, 2012 6:12 am

After the drive coupler is on and the pump is going on, be patient.
When it doesnt engage at 1st rotate SLIGHTLY at the PUMP.
It's a little PIA because you have to draw the pump back to rotate the shaft.
It should slide together properly WITHOUT force
Dont use the bolts to pull it in

(Same "dont force it" rule applies to the opti too if you go that route))


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
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Posts : 372
Join date : 2011-02-03
Age : 42
Location : brockton

PostSubject: Re: waterpump replacement   Tue Aug 21, 2012 9:00 am

thanks for the info, I appreciate it. Something I'm going to attempt soon. Pics to come!
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Posts : 372
Join date : 2011-02-03
Age : 42
Location : brockton

PostSubject: Re: waterpump replacement   Mon Aug 27, 2012 1:42 pm

theres the new water pump installed. After 45 min's of bleeding the system I found out I left off the coupler in the back.
Had to remove the pump and swap over the old coupler. Filled with more coolant (discarded the air pump)
and all was good. Drove it back to brockton from newton with no issues. Thanks for the help Glen.
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Posts : 3891
Join date : 2009-02-21
Age : 45
Location : Midcoast Maine

PostSubject: Re: waterpump replacement   Mon Aug 27, 2012 2:11 pm

Was glad to help mike.
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