In my manual it says that for an XD2 engine the 2 notch gasket is
1.58mm, but for the XD2S engine it says that the 2 notch gasket is
1.70mm and the 3 notch is 1.58mm!! I was surprised, so I checked a 2
notch gasket that I've got here and my digital caliper said it was
1.73 mm. That was right at the metal that circles one of the
cylinders. And this is a brand new headgasket that I got from a guy
who got rid of his Peugeot so it's of unknown origin.
Thanks
Erik
On Sun, 23 Jan 2005 20:57:31 -0500, Brian Holm <peugeots@vtlink.net> wrote:
> Erik
>
> The .84mm standout is for XD2, .79mm for XD2S (and XD3T I assume).
>
> Don't rely on Altrom, or any other non-specialist website for accurate
> application information. Ask for brand information--there are some cheap
> gaskets out there.
>
> Also, there is a widespread misconception that the gasket thickness on XD
> engines has something to do with resurfacing of the head. It does NOT! It
> has to do exclusively with the piston standout. Milling the head has next
> to no influence on compression ratio, because the bulk of the combustion
> chamber is inside the swirl chamber which has but a narrow mouth on the face
> of the head. There is a little volume in the valve cutouts, but the valves
> and seats are usually ground when the head is milled, recessing them enough
> to compensate for the volume of the cutout lost by milling.
>
> This is a serious and widely prevalent misconception which I believe is
> responsible for a lot of crappy-running diesels. In my experience, more
> than 95% of diesels came with 2-notch (1.58mm) gaskets originally, and
> should have a 2-notch replacement, but I estimate that about 75% of
> headgaskets sold (not by me!) are 3- or even 4-notch.
>
> My advice is, if you take off a 2-notch gasket, and you don't see valve
> marks on the piston tops, put one back. If you take off a 3-notch, measure
> the standout and replace accordingly, which will probably be with a 2-notch,
> because some misinformed or lazy ("Play it safe--use the thick one") tech
> has been in there before. Checking my sales records, of the latest 40
> headgaskets I have sold after issuing the above advice, 39 have been
> 2-notch.
>
> On the issue of headbolts, the later TTY bolts, threaded more than half way
> up, are much better than the early bolts, and should be retrofitted on TD
> and XD2C engines that don't have them already. They can be reused five
> times, but they usually won't be because they are much more effective at
> holding the gasket, so the head may not have to come off again until it
> cracks. TheTTY bolt heads look just like the early bolts so you have to
> pull one to tell which bolts you have on a pre-'86 engine.
>
> My two-bits worth.
>
> Brian Holm
>
>
> At 04:14 PM 1/23/2005, Erik Lane wrote:
>
> I know about all that. My question was because on the altrom website
> it states that the cutoff mark between using the different thicknesses
> of gasket is at .84mm piston projection above the block and in the
> Peugeot factory manual it says the cutoff is at .79mm. I was wondering
> about the .05mm discrepancy.
>
> Sorry if I wasn't clear. I'm not very good at making sense in written
> words all the time... :(
>
> Thank you Abel for the contact info for Disortex!
> Erik
>
>
> On Sun, 23 Jan 2005 00:38:21 -0800, Joseph Ashment
> <wyofisher@earthlink.net> wrote:
> > I don't know about those numbers as I don't have a parts manual. What I
> do
> > know is that there are different thicknesses of headgaskets for the
> diesel
> > depending on how much the head has been planed. I believe that it is on
> > the back left (car's left) of the head that you should be able to see a
> > notch or notches in the portruding headgasket. These notches tell you
> how
> > thick of one to order. never heard of altrom, if they can't help, try
> > Brian Holm or Western Hemispheres, I have found both to be very good.
> > There is another good supplier known on the list, but the name escapes me
> > right now.
> >
> > Joe
> >
> > > [Original Message]
> > > From: Erik Lane <eriklane@gmail.com>
> > > To: <peugeot-L@yahoogroups.com>
> > > Date: 1/21/2005 1:23:16 PM
> > > Subject: [Peugeot-L] altrom questions
> > >
> > >
> > > I'm going to put a new headgasket in a 1982 505 XD2S that I have and
> > > found their prices to be the best, but their two headgasket choices
> > > have a discrepancy when I compare them to the Peugeot shop manuals
> > > that I have.
> > >
> > > One their website they say:
> > > Head Gskt PISTON .84mm-UP OVER DECK BG050 $41.20
> > > Head Gskt PISTON TO .84mm OVER DECK BG160 $50.60
> > >
> > > but in the shop manual it says that the cutoff is at .79mm. Does
> > > anyone know why there's this difference? A slightly different
> > > thickness of gasket, perhaps? A simple error by someone along the way
> > > in data entry?
> > >
> > > Also has anyone ordered from them before and if so how were they?
> > >
> > > Here's the website:
> > > http://www.altrom.com
> > >
> > > Thanks!
> > > Erik
> > >
>
> Brian Holm, Parts for Peugeots
> at Peugeot Holm, since 1969
> 2120 Maple Hill
> Plainfield, VT, 05667
> 802-454-7132, fax -1310
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Received on Mon Jan 24 10:31:25 2005
