[Vwdiesel] Head gasket question
Tony and Lillie
tonyandlillie1 at earthlink.net
Fri Sep 12 09:41:27 PDT 2008
for starters, I can't imagine those cracks leaking coolant. I've seen them
on literally hunderds of heads in these VAG cars, and have never seen any
that leak coolant through there. Your mechanic simply has you paraniod about
it, as far as I can tell.
I wouldn't suggest putting anything in the head. If it falls it could cause
you long term internal engine damage.
What you are describing sounds like a bad headgasket. Either that, or there
is a crack in the head somewhere, and magnafluxing the head will show this.
However, your description was that the headgasket replacement fixed the
problem for a while. So, that makes it sound like the headgasket is failing
Did you have the head checked for bing true the last time it was installed?
Were the headbolts retorqued? Was the head magnafluxed then?
On the subject of the engine swap, it will bolt right in. I'm not sure about
the head interchangability, though. There will be a couple of things to
know. You want to use the 1.6 complete, with it's injection pump. The
exhaust will be different, so you need the downpipe as well. There may also
be some differences in the cooling system, but hoses are easy enough to come
by for NA diesels.
----- Original Message -----
From: "Doyt W. Echelberger" <doyt at buckeye-express.com>
To: <vwdiesel at audifans.com>
Sent: Friday, September 12, 2008 8:52 AM
Subject: Re: [Vwdiesel] Head gasket question
Mark suggests a kerosene-dribble test, and points out that the head
flatness needs measurement.....both of which makes a lot of sense to me.
Very helpful. Still interested in other replies.
With the head off, I can get a flatness reading from a machine shop. That
still leaves the cracks as a factor. Maybe a crack leak could be plugged up.
Permatex makes something that might work, other than the "low pressure"
notation in the product description.
Permatex® Hi-Temp Metal Repair Compound
"Makes long-lasting repairs to high-temp, low pressure exhaust leaks from
the exhaust manifold to the muffler. Gets stronger with heat up to 2000°F.
One-part, water-based ceramic is safe and easy-to-use."
Maybe I could work this stuff into the cracks and then peen them, and have
a shot at getting the leak plugged up?
Compression in a cylinder certainly isn't "low pressure."
Maybe something else or some other approach exists....epoxies? Anybody
know anything about soldering-brazing-welding for this situation? I'll bet
somebody has tried anything I can think of, and can tell me what happened.
I don't want to buy another head.
I do have a naturally-aspirated 1.6 running in my 84 Rabbit that would drop
into the space vacated by the TD. Or, could I just swap the heads? Does my
TD head have anything special that would make such a swap unwise?... like
high-temp valves, different cam, different passage locations...?
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