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Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
Satisfied Customers: 3406
Experience:  30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
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Gh crankcase vacuum in 1995 Dodge 2500 4X4 8.0l V-10, rear

Customer Question

Customer: high crankcase vacuum in 1995 Dodge 2500 4X4 8.0l V-10, rear seal squeel. Looking for diagnostics & repairs.
JA: Thanks. Can you give me any more details about your issue?
Customer: Experiences a squeel. While under the hood trying to isolate the squeel I pulled the engine dipstick & squeel quit. I replaced the dipstick & squeel came back, I removed the engine oil fill cap & found high vacuum. Looking for cause & repair. I understand the 8.0l has no PCV, so where is the crankcase ventilation inlet tube??
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $18) to post your type of question to Dodge Experts (you only pay if satisfied). There are a couple customers ahead of you. Are you willing to wait a bit?
Customer: yes
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Submitted: 1 year ago.
Category: Dodge
Expert:  Dodgerench replied 1 year ago.

Hi, welcome to JustAnswer!. This is Ed.

Funny you'd mention the squeal!

I had exactly the same complaint a number of years ago and it WAS related to a vacuum leak that sucked so much air from the crankcase that it caused a squeal noise from the rear crank seal.

It was the intake manifold.

The lower intake gasket had sucked out and it was applying so much force to the crankcase that it caused the rear crank seal to vibrate as air was pulled past it. You may notice that the engine idle runs higher than normal or that there is an idle unevenness, but the problem is that the vacuum leak is contained below the intake manifold and transferred to the crankcase. That breaking the seal by pulling the dipstick changes the noise, it positively verifies that you have a heavily negative pressure in the crankcase. The good news?

It may be that your truck is covered by Recall RC-643-95 which exactly covers this sort of problem. You'd need to provide your VIN to me online for checking (which does become public domain) or call your local Dodge dealer to see what your recall applicability is. I'd be happy to run your numbers if you send me the last 8 digits of your VIN (but remember it can be accessed forever online). There are close to a dozen recalls listed for this truck and engine combo, so others may still be waiting.

Despite this being a free factory fix, PLEASE rate my diagnosis favorably, as this is the only way I can be compensated for my time. It'll save you hundreds in diagnostics and repair costs.

Thanks,

Ed

Expert:  Dodgerench replied 1 year ago.

Just checking in. Any news?

Ed