Question about solvent cleaners

PCV valves are pretty inexpensive, probably about the same as getting the stuff to clean them out so it is probably cheaper and easier to just replace the PCV valve.

I've heard good things about MotorVac service that some service facilities perform.

You can also try using engine cleaners that you add to your oil just before you change the oil.

Thank you.

You're welcome!

Varsol or mineral spirits is prefered (non-green solution) - i would nto bother cleaning a PVC valve though. Buy a new one.

My oil pressure in my 5 year old 185,000 mile 1980 Corolla SR-5 dropped about 1/3 after 'cleaning' it with Marvel Mystery Flush! I wouldn't recommend ANY of these 'engine cleaners', myself. Just change the oil every

I'm pretty sure Ray wasn't suggesting I add one of those engine cleaners to my engine oil. My original question was about what to use to clean gunked-up parts, and he suggested that stuff as an option.

I agree that it's better to buy a new PCV valve, but sometimes that isn't an option.

On a totally unrelated note, I wonder if my PCV valve is made of PVC?

Here's a handy guide to chemical compatibility of several materials:

It says neither PVC nor CPVC fare well against unleaded gasoline. I'm guessing PCV valves are made of nylon (excellent against gasolines and motor oil) or polyester (not listed).

My bad. I thought he was suggesting an Engine Flush...

If the engine is 90% toast, then I'd suggest an engine flush as a last-ditch effort.

If the engine was 90% toast, I'd recommend some butter or low-cholesterol spread.

;-)

LOL! Good one! I had that coming ;-)