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Username Post: 1965 Chevy C10 / 1992 350 / coolant leak        (Topic#348348)
Valued Contributor
Posts: 2768
Loc: what does this part do?
Reg: 05-26-02
11-22-17 03:50 PM - Post#2715362    

ok, old C10 is leaking coolant.

1965 Chevrolet C10

1992 5.7L / 350 chevy truck engine / with screw through valve covers

I crawled around and probed, examined...

coolant is dripping off of the big hose from the water pump to the bottom of the radiator.

so, I am looking at the hose to see if it has burst or something, but the coolant is running down the bottom/back side of the hose, I trace it up and it seems to be wet above the hose as well. HMMN.

I am thinking, the weep hole in the water pump. I can't see and actual drip tho'. The top of the harmonic balancer looks wet tho' and cool has been slung all over the underside of the hood and engine compartment. The amount of coolant is a lot, not quite pouring, but lots of coolant and plenty of drip drip dripping action.

So, I'm guessing I will be swapping out a water pump this weekend.

Open to any idears of other things to check.

Just wanted someone to check my thinking, maybe I'm missing something else to check. grin


-W Ecklers

Posts: 13

Reg: 09-01-13
11-24-17 12:46 PM - Post#2715581    
    In response to Woogeroo

Pull off the hose from the pump and check the spigot for rust. I recently changed the WP on my '88 G30's 5.7 and the raised rib on the end of the hose spigot was half rusted away. That allowed the hot pressurized coolant to pass thru and force it's way between the hose and worm clamp to seep out of the top then run down the hose. I wasn't surprised since the WP was 20 years old.


East Texas

Valued Contributor
Posts: 2768
Loc: what does this part do?
Reg: 05-26-02
12-10-17 08:53 PM - Post#2717526    
    In response to Dirtywerk

Water Pump Adventure - 11/24/2017

with details and photos, if interested.

happy wrenchin' folks,

-W Ecklers

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