My 320/6 has a breather hose connecting the engine via the cam over to the air filter box. This is suppose to vent oil gases as the pressure builds up in the engine.
Lately the vent is purging oil and I mean OIL into the air filter box. It took a 1/4 box of tissues to clean off the oil in the air box when I checked the last 2 times. There is no rubber valve that I can see that is causing this problem.....everything is metal under the the cam cover.
Anyone can advise why this is happening??????
urgent need your imputs guys
Re: urgent need your imputs guys
Usually a symptom of old valve stem seals. You got a smoke exhaust gas when you put the power down?
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- e21-Mark
- E21 Master
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- My E21(s): 316 m52/2.8 Cat Cams & Jenvey ITB
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- Location: Cornwall - UK
Re: urgent need your imputs guys
Run hose from the cam cover vent into a catch tank rather than into the air filter.
Re: urgent need your imputs guys
Nope there is no smoke that I can see.........nas80 wrote:Usually a symptom of old valve stem seals. You got a smoke exhaust gas when you put the power down?
Re: urgent need your imputs guys
Hmmmmm..........this would not explain why i m having this problem........know?????/e21-Mark wrote:Run hose from the cam cover vent into a catch tank rather than into the air filter.
- e21-Mark
- E21 Master
- Posts: 5715
- Joined: Fri Mar 21, 2008 2:19 pm
- My E21(s): 316 m52/2.8 Cat Cams & Jenvey ITB
- Facebook page: https://www.facebook.com/JackyardBackoff
- Location: Cornwall - UK
Re: urgent need your imputs guys
Crankcase pressurizing and/or worn valve guides, oil stem seals etc.
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Re: urgent need your imputs guys
Hi, oil pumped up through the breather hose is a symptom of crankcase compression. This is due to piston blow-by caused by excessive bore wear and/or piston ring wear.
1976 e21 320i A4 Alpina #1755