Possible Blown Headgasket?

[1lslincoln]

So I have a 05 V8 Sport, recently put a new engine in it and since iv had nothing but overheating/cooling problems. replaced all the cooling parts including all metal radiator and degas bottle and all the plastic, literally all of it. it holds pressure perfectly no problem at all but last install it worked perfect first drive then upon getting home and letting it idle the heat went out and fan came on, ugh. there was no air coming out of the bleeder. I got tired of messing with it so i brought it to a local lincoln dealer and let them diag it. They told me it took them a couple drives to even get it to over heat (i could never get it past idle without overheating) and said the coolant was 1.5 gallons low. I put about 4 almost 5 gallons of 50/50 in during the fill/bleed procedure so i’m not sure how but that seems like ALOT of coolant. they vacuum filled the system and put more coolant in it and couldn’t get it to overheat after that. once they got it on a lift they said the head gaskets are externally leaking, quoted me 6200 LOL. On the way home the heat cut out and it overheated like it did before? does this sound like a externally leaking headgasket would cause this? should i just bring this to another shop and see what they say?

 

[04_Sport_LS]

should i just bring this to another shop and see what they say?

YES!!!

 

[04_Sport_LS]

GenII LS8 Cooling System Overhaul

 

[1lslincoln]

GenII LS8 Cooling System Overhaul

will bring it somewhere else, but i did this i promise, i sourced all oem parts besides rubber hoses and even today trying to mess with it heat won’t come on and coolant is full

 

[04_Sport_LS]

The cooling system might be air locked.

You also might want to start with the water pump. There ARE known instances of water pumps failing (pulley shaft to impeller).

 

[04_Sport_LS]

After more reading the Dual Climate control valve might be messed up. Same for the auxillary coolant pump. It circulates the coolant after shutdown.

 

[1lslincoln]

After more reading the Dual Climate control valve might be messed up. Same for the auxillary coolant pump. It circulates the coolant after shutdown.

you know, now that i think about it when it would get hot and i turned it off i could hear a pump running and now i dont anymore, isnt that the aux pump?

 

[04_Sport_LS]

you know, now that i think about it when it would get hot and i turned it off i could hear a pump running and now i dont anymore, isnt that the aux pump?

Yup, but it only runs for about a minute or so... depending on how hot the engine is.

 

[04_Sport_LS]

Yup, but it only runs for about a minute or so... depending on how hot the engine is.

But that wouldn't cause the head gaskets to leak externally. Find a different shop. You may find that there is a hose that runs under the intake manifold and across the top of the engine block.

It's known to leak and typically the coolant runs off the back of the block, and into the transmission bell housing.

That's why the first shop thought the head gaskets were leaking.

Run as far as you can from that first shop. They are idiots!!! (or liars).

 

[04_Sport_LS]

Go to the magnifying glass at the top right corner of this page, and tap on it.

Then type in "cooling system issues" in the box, and hit enter.

You will see multiple pages of cooling system issues for the V8 LS.