When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Ok so about 6 months ago I got a low coolant warning and put some distilled water in the reservoir to bring g it up to full. Well just the other day I got low coolant warning again. Put some MB coolant in. I did a quick look around coolant hoses and don't see a leak. Does anyone have suggestions on where to look for common leaks. If I can't find a leak I am thinking maybe I have a slight head gasket leak that might be leaking small amounts of coolant into a cylinder, which really scares me.
You need to have the cooling system pressure tested. It will show where the leak is.
A symptom of head gasket failure is engine missing or white moisture build up on the oil fill cap. water mixing with oil will show a buildup on the dip stick tube if equipped.
I had this happen to me twice. I discovered the first leak while removing the supercharger to install a larger throttle body and noticed moisture in the valley. You may have to apply new sealing tape to the threads of the hot and cold nipples of your intercooler. I did that and installed new hoses and clamps as well and it resolved my issue.
The second time came when the power steering high pressure hose joint opened a small hole in a coolant pipe and caused a small leak, but only under pressure. I replaced the pipe and wrapped it with a rubber hose to prevent it from happening again. See below.
Another sign of a failed head gasket is the compression pressurizes the cooling system and blows coolant out of the reservoir whilst not contaminating the oil. Happened to me on an inline 4-cylinder engine.
so did a pressure test today. found the leak. the lower hose on the reservoir, which I believe goes to the radiator. leaking from the connection between the hose and reservoir, either the spring clamp is not holding tight enough, or the nipple may have cracked. I had to pump it up over 25 psi to get it to start leaking.
so did a pressure test today. found the leak. the lower hose on the reservoir, which I believe goes to the radiator. leaking from the connection between the hose and reservoir, either the spring clamp is not holding tight enough, or the nipple may have cracked. I had to pump it up over 25 psi to get it to start leaking.
But I'll bet that is a relief. Sounds very fixable. . .
it is, but I was also looking to use "not being able to find a leak" as an excuse to trade this and to move up to a w212 either e63 or I was even looking at the 4.7TT E550s simple EC or Renntech tune will get 500+ WHP I believe.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
