flushing cooling system

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sandpiper
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flushing cooling system

Post by sandpiper » Mon Feb 28, 2011 7:44 am

just wondering how you guys with high mileage 4.3 vortec avoided intake manifold coolant leaks. I see lots of you have cranked on lots of miles. Mine is a 1999 with 122,000 kms on it and Iam starting to get a little concerned, should I just do a gasket change before it goes into the oil and ruins my engine? thanks

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reaper
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Re: flushing cooling system

Post by reaper » Mon Feb 28, 2011 8:06 am

IMO I wouldn't be worried.
I have a 93 ext that still has the original intake gaskets with 280 thou K
& it just started to weep a little bit.
Kidhauler (our local nutbar) has a 99 safari with over 250 thou K,No intake gasket leaks.
You should be OK for some time & allot more K's.
90 Astro Cargo V-8
90 Artro RS - V-8 Now running!
& a bunch of tractors
"there's nothing like a V-8 Polluting the Environment"
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Dayne66
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Re: flushing cooling system

Post by Dayne66 » Wed Jul 17, 2019 11:27 pm

I just lucked out......thought it was the manifold gasket...turns out it's the block heater leaking!!!

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