John Elway

About a month ago I changed my crankcase breather hose, suction pump, pcv, and check valve. It was informed that it was necessary to change all of this when changing the breather hose. It went well I didn't mess anything else up in the process, well so I thought. For the past month my coolant level has been dropping pretty fast. After I fill it in between the min/max level it takes about a week and a half to get low enough to trigger the cooler level sensor. Can someone please explain what is the cause. By the way, there are no hose clamps on any of the hoses that I've changed. But the hoses are still on pretty snug and coolant isn't seeping from anywhere that I can see.

johnkk

When you did the spider hose etc, maybe in the course of moving the reservoir the coolant reservoir or its connections developed a leak. Maybe a water pump leak. If 2.7 maybe the coolant after-run turbo pump under the intake runners. The coolant will often evaporate from a hot engine so no drips. The 2.7 after-run pump leaks will show crusty pink residue under the driver side intake runners. Water pump leaks are hard to see, but with car on lift with engine running the leak can usually be seen.

John Elway

Sorry for not specifying, I have the 2.8l engine. I currently have 127k miles on it and just had the water pump replaced at 120k. The car never overheats or anything. I don't understand where the coolant is going. After a drive I check the hoses and they're completely dry.

wms004

Just throwing out a theory since I'm not fully educated on the 2.8, but maybe valley pan gasket leak? Oil analysis should be able to confirm if coolant is getting into the oil supply.

SloopJohnB@mac.com

I once had a pinhole leak that showed up at 18psi. Sprayed and dried on the engine. No obvious reason for it.

Airbag

I have had many 2.8 cars 12v and 30V . some common coolant leakage areas.

T by the expansion tank
Expansion tank itself.
Pinhole in rad.


kp in mind you may get a leak and never see it because of the under tray.

I recommend you wash the engine and then look for white stain on the timing belt covers etc. this is where your leak will be near.