I bought a car with a surprising amount of chunky, black crud on the oil cap's underside.
It's a 2007 Volvo V70 base w/ This is my third and it has a great service history. I conclude it did a lot of short trips. The white engines do like synthetic oil.
The PCV system has a drip recovery box which drains into a passageway cast into the block and crankcase wall.
The passage ends at the crankcase's bottom. When replacing the PCV box it is suggested you blow air into the drip-back hole and listen for it to bubble the oil in the pan. This'll confirm the absence of a clog.
I had the idea of draining my oil and filling the crankcase with denatured alcohol (a cheap, effective and unsung solvent) and letting it soak the pick-up screen and for mentioned passage. I'd never start the engine with a crankcase full of alcohol.
After an hour or two I'd drain the alcohol and fill the engine with oil.
What do you think? Buying and shipping 2 quarts of KREEN to my door would be appx. $46. Heck, I'd pour a gallon of Purple Power into the crankcase and drain it if I thought it would do some good.
As it is, the alcohol won't even touch any seals or gaskets except for rinsing through the head to the crankcase .
It's a 2007 Volvo V70 base w/ This is my third and it has a great service history. I conclude it did a lot of short trips. The white engines do like synthetic oil.
The PCV system has a drip recovery box which drains into a passageway cast into the block and crankcase wall.
The passage ends at the crankcase's bottom. When replacing the PCV box it is suggested you blow air into the drip-back hole and listen for it to bubble the oil in the pan. This'll confirm the absence of a clog.
I had the idea of draining my oil and filling the crankcase with denatured alcohol (a cheap, effective and unsung solvent) and letting it soak the pick-up screen and for mentioned passage. I'd never start the engine with a crankcase full of alcohol.
After an hour or two I'd drain the alcohol and fill the engine with oil.
What do you think? Buying and shipping 2 quarts of KREEN to my door would be appx. $46. Heck, I'd pour a gallon of Purple Power into the crankcase and drain it if I thought it would do some good.
As it is, the alcohol won't even touch any seals or gaskets except for rinsing through the head to the crankcase .