Antifreeze Leak On My Denali

[ratedr120]

Im having a bit of an issue with an Antifreeze leak. The issue is I cannot find where it's coming from. I have the 6.0 (Vortec 6000) and it only occurs when I shut the truck off and leave it for a while. It's leaking from the passengers side. I had the mechanic perform the pressure test thinking it could be a hose but to no luck. Left the pressurizer on there for about 10 minutes with NO leak, or drip ANYWHERE. I was told that it may be the exhaust manifold gasket bc "There's a crossover that returns the antifreeze to the reservoir" I was next told to let it get worse to see exactly what the problem is. Im not overheating or anything. I have to refill the reservoir about every week and a half to two weeks. Anybody able to help me out? I really would like to correct the problem ASAP. Any help will be MUCH appreciated. Thank You

 

[#1taho]

are you able to see the leak if you climb under your truck ? after you have ran it and shut it down have a look. in the area you have described the is an easy 5 spots it could leak from. if you can see anything that would help alot.

 

[SlowD]

Check the heater hoses/valve in the engine compartment to the rear heater core, routed on the passenger side of the engine bay running along the underside of the car all the way to the rear.
Not sure how any tech would not be able to find a coolant leak especially if you have to fill the res that often unless your reservoir cap is leaking.

 

[OHSIXX]

My passenger coolant leak was a faulty gasket on the original waterpump. I replaced it with a new one along with a new tstat included.....problem solved. I had a leak under the truck one day and noticed my reservoir was empty. Filled it up and it was almost empty a few days later......Maybe not the same problem but worth a look....

 

[01ssreda4]

You really need to pinpoint the leak my friend. Remember leaks typically go down and back.

 

[SLCHOE]

Im having a bit of an issue with an Antifreeze leak. The issue is I cannot find where it's coming from. I have the 6.0 (Vortec 6000) and it only occurs when I shut the truck off and leave it for a while. It's leaking from the passengers side. I had the mechanic perform the pressure test thinking it could be a hose but to no luck. Left the pressurizer on there for about 10 minutes with NO leak, or drip ANYWHERE. I was told that it may be the exhaust manifold gasket bc "There's a crossover that returns the antifreeze to the reservoir" I was next told to let it get worse to see exactly what the problem is. Im not overheating or anything. I have to refill the reservoir about every week and a half to two weeks. Anybody able to help me out? I really would like to correct the problem ASAP. Any help will be MUCH appreciated. Thank You

Thinking you or he meant intake manifold gaskets. No coolant flows through the exhaust manifold gaskets.

Replace your coolant reservoir cap and see if you have any more leaks.