Hello everyone. my brother-in-law needs some help with a problem he is having with his 1998 V70xc. It is smoking, running hot and losing alot of motor oil. It also seems to be having a pcv or blow-by problem, smoke and oil mist coming out of the oil fill cap and dipstick tube. He says that it is running normaly aside from the smoke, but I noticed that the I/C hose was colapsing when the engine was revved up, leading me to suspect a siezed, or faulty turbo, but that wouldn't cause blow-by, and should also cause obvious power loss. What do you guys think?
RUN BOY!!! GET A HOSE TO PUT IT OUT!! 
Melted piston? Id at least do a compression check.
Travis_K wrote:
Melted piston? Id at least do a compression check.
I plan to later on when I com back with my work truck & tools.
Turbo is failing. Oil seals in it are leaking oil into the intake path.
CrackMonkey wrote:
Turbo is failing. Oil seals in it are leaking oil into the intake path.
Is the blow-by/pcv issiue likely related or unrelated?
The pcv is supposed to create a vacuum in the engine internals re;crankcase. Excessive blow-by would make it redundant.
HappyAndy wrote:
Is the blow-by/pcv issiue likely related or unrelated?
Probably not, the engine is probably dying as well. Leak-down test?
Did he jack up the boost or something?
checked into this more today. turbo is not seized but the seals are leaking oil into the intake side of the turbo. the I/C was half filled with oil. draining the oil stoped the I/C outlet hose from colapsing. I also did a compression test. All 5 cyls were between 170 psi & 155 psi, OK considering my BIL doesen't like to change oil. boost pressure is stock (lpt 7psi I think).
So the turbo needs a rebuild, and the pcv system is hopefully just clogged w/ oil.
Hmm, sounds like it may be ok with a new turbo. If he doesnt like chaing oil often/using synthetic, id suggest to him to avoid turbo cars in the future.
Eh, I go by the ECU recommended oil change intervals with my V70T5. That ends up being anywhere from 5k to 7k miles between changes, IIRC.
iceracer wrote:
The pcv is supposed to create a vacuum in the engine internals re;crankcase. Excessive blow-by would make it redundant.
Actually a PCV valve won't open just because the pressure is greater on one side than the other...there has to be a vacuum on the "outside" end or it'll stay good and shut no matter how much pressure builds up on the crankcase side.
