[Vwdiesel] OT Renault turbo diesel runaway!

Erik Lane erikjlane at yahoo.com
Tue Aug 10 22:16:32 EDT 2004

there are fairly large holes in the head to let oil
return to the oil pan. i don't think it would be
possible for there to be pressure in the crankcase
without the pressure under the valve cover being
almost identical.

as far as what happened so suddenly... no idea,
really. in my experience they haven't done that. tho
with all the blowby it must be rings. a leakdown test
might pinpoint it better.

good luck
--- greg rich <greg4vwparts at hotmail.com> wrote:

> Hey Gang
> I have a 1984 Winnebago lesharo (Rialta predecessor)
> with a Renault 
> powertrain, 2.1 turbo diesel (J8S engine), around 80
> hp and ample for this 
> motorhome. We bought it last year in NYC and drove
> it home to Ottawa (10 
> hours) without problems, then camped a few time etc
> racked up another few 
> hundred miles. I recently fixed it up (new cooling
> system etc) and on the 
> test drive it took off on engine oil after about 10
> minutes of driving at 
> 55mph. I removed the intercooler and cleaned it
> (pint of oil) and all the 
> hoses then ran the engine without the blow by
> hoses-it has a block hose, cyl 
> head hose (valve cover), vent hose to turbo and a
> seperator with a drain 
> back to the oil pan. The valve cover has alot of
> pressure which it didn't 
> have when we bought it and if you rev the motor up
> to around 3000 rpm oil 
> will come out of the valve cover! I plan on routing
> the hose in a jar to see 
> how bad it is but what could have failed to cause
> this suddenly? I though a 
> ring would pressurize the crankcase vent not valve
> cover right? I have owned 
> 20 VW diesels and learned what a low compression
> motor sounds like/behaves, 
> this motor does not exhibit those other traits!
> Greg
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