Date: Wed, 2 Apr 2008 17:00:07 -0700
Reply-To: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM>
Subject: Re: Exhaust valve leak on fresh top end rebuild-I need a little
advice
In-Reply-To: <A817922C9DAF504580C0D892C34367760379569A@GNBEX01.gnb.ca>
Content-Type: text/plain; charset="us-ascii"
If it hasn't run yet, I wouldn't pay too much atttetnion , really !
If you had this after sayh 1,000 miles, that might be something then to
think about.
I can not emphasize enough, and have always noticed how much cars and
engines are designed and built for being operated ! like, duh, but they are
NOT designed for sitting around.
And for sure, on an engine, it almost DEPENDS on running to seal properly.
I mean, when there's no combustion chamber, the rings aren't being pushed
out against the cylinder walls, and if the rings and pistons haven't slid up
and down the cylinder walls a few gajillion times.......how can they really
be seated ?
What is your break in oil plan ?
I see OVER and OVER that people try to 'do the really best thing" by
spending the most on something, like synthetic oil right from zero miles (
totallyh the WRONG thing to do ! ) and even using premium fuel, another very
wrong thing to do, seriously. Use mid-grade or regular, but not premium.
I break 'em in a 30W or 40W non-detergent oil even, or lacking that, 30
W or 40W Heavy Duty. Or maybe a normal 15W 40, but nothing fancy.
And change the oil twice even in the first 1,000 miles.
But bottom line, nothing counts until it's been running a bit.
Really.
Scott
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Giasson, Pascal (DNR/MRN)
Sent: Wednesday, April 02, 2008 4:25 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Exhaust valve leak on fresh top end rebuild-I need a little advice
So I decided to do a leak down test on my 1.9 resealed top end last
night just to see if all the cylinders were the same, and to see if I
messed up something on reassembly. The heads have a fresh valve job,
new Goetz rings, and cylinders deglazed and I used Total Seal Quick Seat
piston ring powder on the cylinders. The results were #1: 77%, #2: 87%,
#3:88%, #4:89%. So something is not quite right with #1. I could hear
and feel air coming out the exhaust port so I tried taping on the
exhaust valve stem several times both with the combustion chamber
pressurised and depressurised. I then rotated the valve a little bit to
see if that mad a difference, but it did not. I assume this is not
"normal" and will not get better after the engine gets a few miles on it
(I'm kind of thinking that it might end up burning that valve). Am I
looking at taking it apart again and having a look at that exhaust valve
to see what is going on? Any suggestions? Thanks
Pascal
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