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Re: [T3] Oily IAD


On 30 Dec 2005 at 0:06, Constantino Tobio wrote:

> I've been working in my engine compartment tonight (removing the old EGR
> tube, replacing the original and now very brittle breather hoses) and I
> noticed something a bit strange- oil in my IAD. It's a dark and very
> carbon-laden coating all over the inside of the IAD.

This is all very normal. It's a combination of the dirt/oil that gets thru the 
air cleaner, plus the EGR and the crankcase breather components.
 
> Right now, I'm hoping that it's from a variety of sources: the cyclonic
> air filter, the fact that the breater tubes from the crankcase vent were
> a bit kinked and possibly not breathing right, and that the carbon was
> coming from the EGR. The EGR inlet on the IAD was completely plugged up
> with carbon bound with oil.

I suspect this is common as well, although I haven't taken apart enough EGR 
engines to tell. The EGR connection on my '73 is actually disabled, because the 
filter rusted away, so I don't use that passage anyway. I suspect that a lot of 
what you find there just comes from the same source as the crud above.

-- 
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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