[Vwdiesel] Smoky, Bubbly Engine?

[Will Taygan]

Thanks, guys.  I'm pretty familiar with blown headgaskets and bubbly
coolant.  This one is definitely blown.  

Compression on the #4 low one could be stuck rings, great thought.

Most of my 1.6s don't blow the dipstick up.  It's not just vibration, I
can make it happen by revving the engine, and the oil is coating the
stick most of the way up (although valve cover blowby seems within
spec??  Maybe it's just being sucked into the intake on revs??  It is
the valve-cover-dual-return-setup on vanagon intake)

*** What's "new" to me is #1 and #2 sopping wet with oil. ***

I'm wondering if this is likely a block or a head problem.  Just the
head and I'd fix it, but if it's likely the block...  Well, I had a
difficult rebuild experience this spring, and need another head
anyway...

Thoughts on the oily cylinders?

Thanks,

Will in Alaska.




On Sun, 2009-11-01 at 21:38 -0500, lbaird119 at aol.com wrote:
> The bubbles are mostly likely a blown head gasket or possibly a cracked 
> 
> 
> head but that's not terribly common.
> 
> 
> ?Odds are the smoke smell and wanting to run is worn rings or valve?guides 
> 
> 
> or seals.? It IS possible that it has just sat a long time with some reallly 
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> bad, old oil is causing excessive burning, a stuck ring or two and so on. 
> 
> 
> Blowby is generally a little excessive looking, especially compared to a 
> 
> 
> gasser and does lessen quite a bit as you rev the engine.? The fact that 
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> the blowby is lessening as you rev it, makes me wonder if your dipstick 
> 
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> is blowing out or just vibrating out?
> 
> 
> ? The low hole could be a bad ring or valve but is more likely a stuck ring. 
> 
> A good oil change and warming it up really well just might help most of 
> 
> 
> your problems.? Not the bubbles though.
> 
> 
> ??? Loren
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> 
> -----Original Message-----
> 
> From: Will Taygan <william at taygan.com>
> 
> To: vwdiesel <vwdiesel at audifans.com>
> 
> Sent: Sun, Nov 1, 2009 5:13 pm
> 
> Subject: [Vwdiesel] Smoky, Bubbly Engine?
> 
> 
> 
> 
> 
> I picked up a 1990 Jetta 1.6NA diesel for $400 last spring, and finally  got around to checking it out today (too much time spent reviving the  1982 1.6NA Westfalia.)    The engine has a junkyard marks, and a vanagon intake manifold.    Really smoky exhaust, smells like oil.  Obvious bubbles coming out of  the coolant expansion tank.    Engine sounds like it wants to run away.    Plenty of blowby from the valve cover, blows less when it revs (why is  this??)    Blowby is pushing up the dipstick and inch or so when engine revs.    Pulled the injectors, #1 and #2 were sopping wet with black crankcase  oil (not diesel).  #3 and #4 look good.  All glow plugs work, it drives  and starts well (in the teens today).    Compression was 405, 350, 390, 285, starting with #1 (the oily one by  the timing belt).    I don't really want to pull the head now, since it's gotten cold and I  don't have a garage.  I'm just trying to get a "best guess" as to what's  going on.    Could is be "just" a head gasket?  That I could deal with.  Or, more  likely a full rebuild (probably salvage the head and tranny, but bail on  the block.    Thanks for your ideas.    Will in Alaska.    _______________________________________________  Vwdiesel mailing list  Vwdiesel at vwfans.com  http://www.audifans.com/mailman/listinfo/vwdiesel  
> 
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