ID this noise

[Salty B.]

Originally Posted by X5chemist

Is vacuum is this bad? Excess vacuum is symptom of a bad CCV valve. Has yours ever been replaced? Is it using excess oil?

Not quite THAT bad, but pretty uhh sucky.

The only thing in the prior owner's records is "pilot mod to CCV" whatever that means.

Does not use oil, no change on stick after about 750mi since the last change.

What is this CCV delete thing?

[Fifty150hs]

Originally Posted by Salty B.

Not quite THAT bad, but pretty uhh sucky.

The only thing in the prior owner's records is "pilot mod to CCV" whatever that means.

Does not use oil, no change on stick after about 750mi since the last change.

What is this CCV delete thing?

pilot mod to CCV sounds like the CCV delete I did. It was posted many years ago by C90. Only thing I did differently is add a catch can to the mod. Collects some blow by which gets dumped back into the oil filler every so often instead of getting sucked into the intake to get burned off. Plenty of folks say it shouldn't work, but it does. It cut my oil usage way down. I don't use more than a quart in 5000 miles. Then it is time for an oil change. And contrary to what lots of people say, it doesn't raise the vacuum level in the crankcase. I put a hole in a oil filler cap and plugged a vacuum line into it. I get less than 1psi vacuum. I have 393,000 miles on it.

[Salty B.]

Originally Posted by Fifty150hs

pilot mod to CCV sounds like the CCV delete I did. It was posted many years ago by C90. Only thing I did differently is add a catch can to the mod. Collects some blow by which gets dumped back into the oil filler every so often instead of getting sucked into the intake to get burned off. Plenty of folks say it shouldn't work, but it does. It cut my oil usage way down. I don't use more than a quart in 5000 miles. Then it is time for an oil change. And contrary to what lots of people say, it doesn't raise the vacuum level in the crankcase. I put a hole in a oil filler cap and plugged a vacuum line into it. I get less than 1psi vacuum. I have 393,000 miles on it.

Hmm... if he did do the CCV delete, would I still have all that vacuum in the crankcase? I guess I could try to look for it under the intake.

[Fifty150hs]

Originally Posted by Salty B.

Hmm... if he did do the CCV delete, would I still have all that vacuum in the crankcase? I guess I could try to look for it under the intake.

Even if the CCV is still in place, check to see if the hoses are all still connected to where they are supposed to. Some people leave the CCV in place when they do the delete. The hoses then don't run to the CCV any more.

[X5chemist]

I installed a cold weather CCV on mine. Pictures are posted here.

[Salty B.]

Originally Posted by Salty B.

The only thing in the prior owner's records is "pilot mod to CCV" whatever that means.

After viewing this video, the "pilot mod" is uncapping an unused (on M54; he says its used used for FPR vacuum on M52) vacuum port on the CCV itself and running that to one of the little ports on the back of the intake. No idea if this what the P/O did.

He also has quite the diatribe against bypassing the system, which made sense.

The Febi replacement CCV I got has this thick rubber shell around it held on with what look like small rubber bands, and there's no vacuum port on it. Guess I'll tackle this job once it gets a little warmer here.