454 block leaking around water pump or block area - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-01-2012, 07:58 AM
Riley
 

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454 block leaking around water pump or block area

My dad and me rebuilt this 454 engine. I put it in and put water in it and right away noted a small drip. I think it could be coming from a bolt that goes into the water jacket. What is the proper way to seal that? Permitex Red thread sealer? FYI the pump gasket is new. So where is this leak coming from?
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Old 07-01-2012, 11:01 AM
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Could be seeping past the bolt threads. I use RTV silicone on bolts that protrude into the water jacket.




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Old 07-01-2012, 11:29 AM
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I heard rtv silicone won't work.
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Old 07-01-2012, 01:30 PM
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Take the pump off and look
Even with no sealer it should not leak right away.
The bolt holes for the water pump do not go into the water jacket.
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Old 07-01-2012, 01:50 PM
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FWIW
Try a little plumbers pipe joint compound on the bolts. I'm not certain that the bolts go into the waterjacket on a bbc like the water pump on a sbc, but I wouldn't be suprised if they did.
Let it set-up for a while before starting.
ssmonty
PS I took too long to post and didn't see the previous post. Forget what i said. Is the pump new?
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Old 07-01-2012, 02:14 PM
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I think it does. maybe. I mean I don't know. But I'm kinda sure. hell I ain't a real mechanic. I just know a few things.
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Old 07-01-2012, 02:36 PM
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Water leak

Remove the water pump. Check for cracks,etc. Use some type of gasket sealer on new gaskets. I never used sealer on bolts or had a leak.
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Old 07-04-2012, 08:01 AM
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Well happy 4th everyone. *****

Well I am working on the water leak today,now. I am wondering if the pump is bad. Thats not a new pump and it sat on there for 5 years during the build. Any ideas of where this thing is leaking or why will be reviewed. I will check back later. Thanks.

Last edited by 68NovaSS; 07-04-2012 at 08:20 AM. Reason: Political venting, inappropriate for this forum
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Old 07-04-2012, 10:11 AM
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Quote:
Originally Posted by Riley View Post
I heard rtv silicone won't work.
You heard wrong. It works well and I've been using it for decades.
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Old 07-04-2012, 03:20 PM
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?

Okay so where is the water leak I have coming from then?
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Old 07-04-2012, 03:23 PM
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Okay guys...so is there another water jacket bolt hole up from somewhere? i COULD HAVE SWORN THERE WAS ONE...THE BOLTS HOLDING THE POWER STEERING PUMP BRACKETS ON MAYBE? Maybe the alternator bracket? Alls I remember is that I used gaskets everywhere they were supposed to go. But yet.....I still have a constant drip.
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Old 07-04-2012, 03:38 PM
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Did you replace the gasket that seals the water pump impeller area?
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Old 07-04-2012, 04:27 PM
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Water pump

If that water pump sat for 5 years i would replace it . Probably seals or rear cover gasket leaking. The stock water pumps are fairly cheap, buy the heavy duty with AC model.
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Old 07-04-2012, 05:12 PM
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Put some food dye in the water(if its only water, no anti freeze), circulate the water to mix it up, pressurize the system with a radiator pressure tester(rent from Autozone or??). This will force the leak to flow more, making it easy to pinpoint the problem

Find out exactly where the leak is coming from. Fix THAT part. Could be thermostat, corner of intake/head seal, lower hose, waterpump.

Always diagnois the problem, it may take a little longer, but in the long run, knowing exactly where the problem is will save you time and money.
Learned that the expensive way when I first started working on my cars.
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Old 07-04-2012, 09:30 PM
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I found the drip!

Well I was working on that truck today. I filled the radiator full of water, then went to work on some handles that are in the cab that "turn on" the hydraulic pump for the flatbed (its a wrecker). Then I had to go underneath to hook up the cable down there and low and behold...I found the drip. Its coming out of that hole on the bottom of the water pump. The seal must be going bad. We never replaced the pump...and it had been sitting dry for 5 years while we worked on the motor and the truck.

Well....mystery solved fellas. Thanks for all the imput.
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