[Vwdiesel] IP Pumps, runaway revs and blow by...

[Tony and Lillie]

You have exactly described my Jetta. In my case, it's the valve stems and 
seals. Bad blow by-look for oil in your air filter. Does it smoke bad after 
a long decel-going downhill for example? By the way, your description of 
excessive oil is spot on.

Tony Hoffman

----- Original Message ----- 
From: "Finn Rod" <dubdeesel at yahoo.com>
To: <vwdiesel at vwfans.com>
Sent: Friday, October 13, 2006 10:09 AM
Subject: [Vwdiesel] IP Pumps, runaway revs and blow by...


> Yep, I'll have to try a rebuild on the pump cos I need
> the turbo pump for the syncro...
>
> I've been looking in the archives about blow by and
> runaway and I'm still a bit unsure what is happening
> to me...
>
> As I understand it...
>
> Runaway is caused by oil blowing back into the intake
> and feeding the engine... caused by bad rings
> or bad stem seals allowing oil to run back into the
> cylinder...
>
> I've got a bit of blue smoke from the exhaust which
> seems to disappear (at idle) when it's warmed up...
> Nothing blowing from the dipstick and nothing really
> visible blowing from the vent on the cam cover when I
> disconnect the hose, (it has got a baffle) If I stick
> my finger over it, it comes up black. Smells a bit
> like burning oil... Less blow at higher revs. Exhaust
> is "dry"
> Don't know how long the engine has been sitting on a
> pallet, could be over a year...
>
> So far it's run long enough to warm up twice... driven
> about 3 miles, starts beautifully...
>
> But, if I rev it, even immeadiatly after starting, it
> won't come back to idle... the revs stay high (sounds
> like cruising speed I guess??) even blipping the
> throttle doesn't bring them down or change them at
> all. Pulling the throttle lever back hard against the
> stop increases the revs slightly... Revs are
> constant...
> Disconnecting the breather makes no changes...
>
> The pump has not been used since May 2005, it's been
> on the van, full of diesel, through the winter
> (-40C)and summer (+35C) As it's the TD pump with LDA I
> just blocked the LDA tube and left it as is.
> I know I have 3 good injectors and one solid stream,
> no spray at all...
>
> One other thing, this engine has an hydraulic head but
> the oil pump is from the old enguine (mechanical),
> would that make any difference?
> Oil pressure about 4bar running and 1 at idle...
> (normal for me)
>
> So is this a blow by problem? and if it is, what's the
> process to complete breakdown? (I need to know how
> long I can trust it...)
>
> Thanks guys, sorry it's a bit long...
>
> rod of finland
>
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