My 2012 Toyota Tacoma 4.0 has started consuming excessive amounts of engine oil (per Toyota Canada's Oil Consumption Test 1.65 ltrs per 2100km) and some coolant. I had recent work done to the top engine, but dealership kicked me to the curb AND Toyota Canada's Techs say they can't find the problem. And that there is NOTHING MORE THEY CAN DO. I NEVER had an issue before the work was done.... I complained to Toyota Canada that they were not performing the right diagnostics to find the problem (NO EXTERNAL LEAKS)
My point is that my engine is burning both coolant and oil. I personally performed a Combustion Gases Test (in total about 1hr period)
and nothing showed. I will do a compression and leak-down next. I pulled plugs and you can see sooty residue around the out/inner sparkplugs but no real oil fouling. I have some white/creamy residue on the underside of my oil fill cap; (Toyota cleaned of previous residue)
My suspicions are that I have a cracked head(s) inside of the intake valve port. Head gaskets I think are ok as I mentioned that while running the engine, I performed a combustion gases test and nothing showed up.
HOW CAN I perform a diagnostic determine this without pulling the heads>>>? Can I pull the intake manifold/cowling...then block that cylinder off which I am performing the test on (or all of them), then with the intake valves open, put compressed air into that cylinder and perform a combustion gases test?
Also, using dye / UV light... in both oil and coolant.... Will the dye show up on the, sparkplugs, exhaust tail pipe?
I am at that point that I will have to perform further diagnostics to find the problem; It would seem that Toyota Canada is stuck in the mud
Any assistance is appreciated