Date: Sun, 8 Jan 2012 16:18:50 -0800
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Smoke after head replacement
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Hi..
could be old coolant in the muffler/exhaust system.
Drive it around a while under load.
Every engine I fire up has fumes, smells, etc...for a while..
and junk out the tail pipe. So give it plenty of run time, under load ..
to 'burn things out.'
it's not about whether the 'valve guides' leak..
those are not even things that seal..
( though there can be 'valve guide seals' .a small lip type seal on top of
the valve guide to help keep oil from running down the valve guide and being
consumed that way. )
it's the sealing of the actual valve face against the valve seat.
The black 0-rings can be replaced at the bottom of the barrels just by
sliding the barrels up far enough ..but not so far the rings fall out.
I have never seen a black o-ring leak there.........which would be coolant
into the oil...
so usually leaving them alone is fine.
if you put each push rod right back where it was....the rocker arm screw
adjustment could be all right.
You 'can' never check them..
but it is better to actually.
Bentley says ...it might be 1 /12 turn to back off..
some people say one turn.
Scott
www.turbovans.com
----- Original Message -----
From: "Gregg Carlen" <gregg.carlen@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, January 08, 2012 11:16 AM
Subject: Smoke after head replacement
> Hi folks,
>
> Similar to Todd Last's collapsed lifter that he shared a video about, I've
> got a similar situation on my 91 Westy. Oh yeah, I'm in Oakton, VA.
>
> I had the classic water gasket leaking coolant. I removed the passenger
> side head with engine in the van, cleaned it up, checked it for leaking
> using Scott's recommendation to check the valve guides using gas (I used
> parts cleaner instead of gas with no signs of leaking along the valve
> guides) and reinstalled. Did the fuel lines while I was on that side of
> the
> van as well. New gromets, gaskets, etc all the way around, nothing rubber
> reused. (I repalced the green o-rings on the cylinders, but no the black
> one's back inside the engine since I didn't remove the cylinder sleeves).
> So, all back together, she fires right up on the first try. Usual bleeding
> of the coolant, etc.
>
> Now, as I expected, there should be some smoke as oil/coolant that may
> have
> gottent to places it shouldn't have. There was. A lot of it. I thought at
> first it might be a collapsed lifter (one was squishy when I put the push
> rods back in). However, I don't have the knocking sound that Todd had in
> his video, just lots of smoke.
>
> I've run it about 10 minutes total and still no change. I'm wondering if
> I've managed to mess something up and actually have coolant getting into
> the combusion process.
>
> Any advice as to what to check first? Or, just need to run it more? I did
> NOT adjust the valves, just replaced the assemble as I had taken it off.
> Perhaps I need to go through the valve adjustment process? (Although I
> don't here anything abnormal from that area).
>
> A short video is here:
> https://picasaweb.google.com/lh/sredir?uname=113741720077010029753&target=ALBUM&id=5695338093044400273&authkey=Gv1sRgCIeJqISt-qiL5gE&feat=email
>
>
> Gregg
> Blueberry - 91 Westy (2.1L stock)
> Oakton, VA
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