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Mysterious coolant leak wtf??


matslp488
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Yesterday after getting home from work and letting the truck sit for a while I noticed a small puddle of coolant under my truck... I gave it a quick check but couldn’t find anything obvious.. only thing found was that it leaks down onto between engine and where the tranny meet so I checked both hoses that go into the firewall for the heat condenser but those seem ok...any other suggestions?? Thanks! 05 SS 

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I'd ask over on PT for more traffic and eyes on your question.  I can't think of what might be leaking at the rear of a 6.0 except possibly intake gaskets?  You had proper antifreeze concentration in the system so no potential for issues with that shit weather we just had?

Richard

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Thanks guys for the suggestions... I have checked and checked I everything points to be the intake gaskets... I haven’t driven the truck in a while to prevent any major damage.. it’s just parked waiting for me to start working on it... truck is filled with coolant so the cold weather wasn’t a factor.. 

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  • 4 weeks later...

Found my problem... 1 side of the coolant crossover pipe on the rear side of the engine was leaking from the o-ring gasket... I bought the replacement felpro gaskets that have 4 and replaced both rear ones and front ones since I was there already... pretty simple and cheap fix... trucks been good ever since... hopefully someone finds this useful in the future 👍🏼

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On 3/28/2021 at 10:03 PM, matslp488 said:

Found my problem... 1 side of the coolant crossover pipe on the rear side of the engine was leaking from the o-ring gasket... I bought the replacement felpro gaskets that have 4 and replaced both rear ones and front ones since I was there already... pretty simple and cheap fix... trucks been good ever since... hopefully someone finds this useful in the future 👍🏼

Glad you found it. It's easy for people to overlook these crossover pipes. I chased this for a bit too. Never leaked fluid to the point it would show up, but I could catch the scent of hot coolant from time to time

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