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Date:         Thu, 22 Oct 2009 18:08:42 -0400
Reply-To:     craig cowan <phishman068@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         craig cowan <phishman068@GMAIL.COM>
Subject:      Re: 1.9 Head replacement (was lifter collapse / smog issue)
Comments: To: Dennis Haynes <d23haynes57@hotmail.com>
In-Reply-To:  <BAY132-DS705F993C8A109AFF46FA5A0BE0@phx.gbl>
Content-Type: text/plain; charset=ISO-8859-1

Ultra Copper is O2 sensor safe and works if you have really fouled mating surfaces between your pipes.

-Craig

On Thu, Oct 22, 2009 at 6:02 PM, Dennis Haynes <d23haynes57@hotmail.com>wrote:

> Silicone anything on exhaust gaskets does not add any sealing value except > maybe to foul the O2 sensor and catalyst. > > Dennis > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of > craig cowan > Sent: Thursday, October 22, 2009 4:12 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: 1.9 Head replacement (was lifter collapse / smog issue) > > Any exhaust gasket that comes off needs to be replaced. You're unlikely to > get a good seal putting a used gasket back on, as they compress to fit. I > also tend to replace every coolant or otherwise gasket that I take off, as > I > tend to feel that most are a "one time" use type of thing (as they compress > to fit). > If you've never taken a head off before, come ready with a pry bar and > rubber mallet. They don't always put up a fight, but when they do, you want > to be armed. Benny-Boy has a great video on how to remove a head > (properly), > you might want to check out his site. > Keep everything clean, the cleaner the better. It's always good to have > clear access to what your doing, and clean it up BEFORE you remove the > head, > otherwise stuff will just fall in as you take the head off. > Junk in an engine= bad. > > There's some people that believe you cannot remove the head even once > without having to replace the studs, which are of the stretch variety. It's > a reasonable claim, I've just never felt the need to replace them (if > they're in good shape). > > When you get the heads off and you want to clean up the insides of the > combustion chamber (on the head) or the valves themselves, Regular H20 > (Water, Hydrogen Hydroxide, Etc) will make carbon dissolve if you just let > it soak for a bit. I learned that if you soak a valve covered in carbon in > a > glass of water, you'll be left with a clean valve. > > Upon reassembly remember to wet your gaskets. Coolant gaskets get wet down > with some coolant, Oil gaskets with some oil, and Exhaust gaskets can go on > dry (though I like using Permetex Ultra Copper on both sides). > > Good luck, have fun. > > -Craig > '85GL turned WESTY > BOSTIG in the back > > > > On Thu, Oct 22, 2009 at 3:51 PM, Leonard Anthony > <whitewatering@gmail.com>wrote: > > > The lifter was fine. The valve adjuster tip (intake, cyl 1) sheared off > so > > I > > replaced it and adjusted the valves. > > The exhaust valves on 3 & 4 failed the leak down test. This engine is a > > Canadian VW Reman with ~ 15,000 mi. > > Cyl 1&2 tested OK, German head. Cyl 3&4, bad valves, on AMC head. So this > > is > > probably a quality issue with the valves on the AMC heads, as I've read > all > > about it. Even though the engine has very low miles it had been replaced > in > > '02, seemingly a very bad year for AMC heads, from what I have read from > > the > > archives & elsewhere. > > > > Before I pull the head off, I thought I would ask (those on the list who > > have replaced heads before) if there are any shortcuts, hints or do's & > > don'ts not covered in the Bentley on head replacement. I don't want to > > touch > > the good side. Will 1 head gasket set be enough or will I also need > exhaust > > / coolant etc. gaskets for the good side? The engine does not currently > > leak > > anything, the water jacket is fine. > > > > Also, I'm wondering how to tell if the heads are 1.9 or 2.1, as it sounds > > like they should not be co-mingled on an engine. What about co-mingling > > German & Spanish heads, as was done on my VW rebuild? I do have an extra > > German 1.9 head but until I pull them off the engine(s) I won't know > which > > one will be better to use. > > > > > > Thanks, > > Leonard > > > >


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