What causes oil to leak only when running?
Your seals only leak at temperature or under high pressure. When your car is running, pressure and stress can force oil past your seals as you drive down the road.
Does a rear main seal leak when running?
If your car seems to be losing oil quickly but you do not see visible leakage when your car is parked, your rear main seal could be in the early stages of failure. Running the car while it is stationary over concrete makes this easiest to spot. Make sure to check the cover gasket and valley pan for leaks.
Will thicker oil help rear main seal leak?
Manufacturer Recommendations. As an engine heats up, the oil thins, becoming more susceptible to leaks through faulty gaskets. Draining the oil from your vehicle and replacing it with a thicker weight or synthetic oil can help to prevent oil from leaking through some of the smaller breaks in the gasket seals.
When to replace the front output seal on a 4Runner?
My 2001 4Runner recently developed a relatively fast leak from the Front Output Shaft Seal on the Transfer Case. My 1997 has had a slow leak from the Rear Output Shaft Seal for some time. I replaced the front output seal on the 2001 today, and the write up follows below.
Why is my Chevy Vortec 4300 V6 leaking fuel?
In the L35 and LF6 engines, the spider injectors are known to leak at the pressure regulator and at the supply and return lines due to a design fault. Outside of leaking fuel onto the exterior of the engine itself, it can cause excess fuel to get sucked into the engine.
What causes engine knock on a 4.3L Vortec?
Engine knock can be caused by a ton of factors, such as low-grade fuel, bad spark plugs, carbon build-up, etc. Engine knock is terrible for your engines internals and can cause serious damage to the pistons and to the cylinder walls. On the 4.3L vortec, the cause of the engine knock has not necessarily been figured out, still to this day.
https://www.youtube.com/watch?v=zZsFOfp_22g