XROC Bulletin Board

crunchie

Well Guy's the time has come. . . strip down refurb PAINT begins

Just move the ally plate back and forth THEN IT SHOULD COME OF.
Then weld a nut onto the stud and while its hot undo it . . .Phew the only one to snap off even the exhaust bolts came off ok

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Crunchie

Taps

Marcus 4x4 · Posted: Mon Sep 18, 2006 9:34 am Post subject:

Skim, i would m8 looking at them, best be on the safe side than to have problems when reffitted Wink

Pistonheadz · Posted: Mon Sep 18, 2006 6:19 pm Post subject:

Skim, skim, skim.

keep us posted m8.

Wink

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'88 2.8 (SORN)

crunchie · Posted: Mon Sep 18, 2006 6:55 pm Post subject:

OK got message there off tomorrow for a skim. . . . . BUT is it millimeters or thou they take off. Do I tell them or do they just do it Should there be holes here in the head?
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Crunchie

littlegems4x4 · Posted: Mon Sep 18, 2006 7:27 pm Post subject:

Think mine had holes there, I thought it was odd though 'cos the gaskets I got didn't have the holes, so it blocked them off Confused

I've been running it like that for a good few thousand miles now and all's well Wink

Oh but mines a 2.9, don't know if that makes any difference Confused

Are they just really badly blocked, or is that metal I'm seeing Question

crunchie · Posted: Mon Sep 18, 2006 8:07 pm Post subject:

Well it looks pitted as there was holes in gasket. . . .
looked on block and there is holes there but not on head so should there be any there

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Crunchie

littlegems4x4 · Posted: Mon Sep 18, 2006 9:46 pm Post subject:

Just managed to dig out a pic from when I had my heads off, as you can see mine does have holes there Confused

But is it different 'cos it's a 2.9 Question

Marcus 4x4 · Posted: Tue Sep 19, 2006 10:33 am Post subject:

Interesting is this Shocked

i just looked at a spare set of heads i got in the shed and they have no holes Exclamation

Anyone got any ideas to this:?: is this a case of 2.8 vs 2.9 differences Question

crunchie · Posted: Tue Sep 19, 2006 7:12 pm Post subject:

Me to. . . so it looks like there are two types of head gasket
One with and one with out my new Payen D401 set has holes

Any way whats the idea with no valve stem rubber on exhaust
JUST a PLASTIC cover. . .Whats this all about any one shed Light on it.
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Crunchie

MrOversteer · Full Member Joined: 06 Oct 2004 Posts: 77

Yep, 2.9 head has the extra cooling channels between the chambers whereas the 2.8 doesn't.

One mod is to drill a hole in the head for each channel ie where you have the pitting. (I've got the details in a V6 tuning book somewhere - I'll see if I can find it...). Think I used something like an 8mm dia drill bit and you have to be careful when you break through the water jacket not to drill any further and consequently ruin the head.

Quite easy to do really and anything to improve cooling on the 2.8 is a bonus IMO.

Perhaps the exhaust valve stem oil seals are 'plastic' due to the higher temps reached than the inlet valves? Not sure if that's correct though.

Marcus 4x4 · Posted: Wed Sep 20, 2006 10:30 am Post subject:

littlegems4x4 · Posted: Wed Sep 20, 2006 12:53 pm Post subject:

So does that mean that I have a gasket set for a 2.8 in mine as it didn't have holes there Confused

As I say I've been running it for ages now with no probs Confused

Marcus 4x4 · Posted: Wed Sep 20, 2006 1:56 pm Post subject:

crunchie · Posted: Wed Sep 20, 2006 8:40 pm Post subject: