Oil Contamination in Coolant Reservoir A Comprehensive Troubleshooting Guide

Instead of liquid soap, I would use baking soda and water. I would mix the baking soda and water in a 5 gallon bucket and I would add enough ... The black gunk in your overflow reservoir looks kinda like misshapen globs like what you see in a lava lamp, it may be engine oil. Yes, oil can leak into the cooling system but that does not mean coolant will necessarily simultaneously leak into the oil. For example, if you ... Lubricating or Transmission Oil in the Coolant Cause Correction STEP 1 Bulk coolant supply is contaminated Check the bulk coolant supply. Drain the coolant and ... Any chance you topped off your coolant reservoir recently with a funnel you also use for oil? If you take your rig to a shop for service, did ... I have an L322 HSE 2008 4.4 V8 i found oil in the coolant reservoir. I've changed the oil coolers and hoses and it happens again 6 months later. Using some Preston coolant flush solution and running the engine hot 20-30 minutes idling and letting the coolant cool to 150°F, i was able to ... If you have OIL in your cooling system they had better be replacing the oil cooler. It is not uncommon for us to replace both the oil cooler and ... Only way to tell at this point is to perform a compression and leak-down test to see if it really is the head gasket or something else. Fresh ... One tip, is to double check the oil cooler itself for trueness against a straight edge just to be sure that it is not slightly warped. Not ...