In message <email@example.com>
Jon <firstname.lastname@example.org> wrote:
> Hi All,
> I checked my timing on Friday and all was OK, so left alone.
> Some time ago now Richard was willing to bet "a cup of tea" that my
> head gasket would be failing around cylinder No. 4.
> On Saturday it went about 20miles from anywhere.... Lots of oil vapour
> pouring through the breather into the turbo and still enough
> compression in the rocker box to lift the oil filler clear of the
> hole... By the time I got to a road 99% of the oil had been dumped or
> burnt. I got towed home from the road.
> I set about removing the head last night...
> Big hole in gasket between the cylinder nearest the bulkhead and the
> pushrod hole nearest the bulkhead...
> After 150,000miles honeing marks are still visible in the middle 2
> cylinders (never turned the engine over to check the other two). Top
> of pistons look OK.
> I am sure the head has been off before (previous owner). Firstly,
> bolts where not all torqued down to the same amount and secondly,
> silicon present between block and gasket.
> I dont know yet how much oil is left in the sump (never got to it last
> night). I do know bugger all shows on the dipstick.
> 1. Can or should the head be skimmed? I have read previously
> conflicting opinionson this. The gasket that came off had 3 holes in
> it, indicating the thickest one.
I'd get a place to give it the lightest skim they can - if nothing
else it proves everthing is ok.
> 2. Should gasket sealer be used when I put the new gasket on? I
> always thought they should be put on dry. The reason I ask is
> becacuse when I removed the current one there was some silicon
> blocking a few small holes in the block (approx 3mm or 4mm diameter
> between the pushrod holes in the gasket. This sounds bad to me and is
> perhaps a reason why my temperature was always on the higher side of
> normal. I have photos of the holes in question if clarification is
Definately not. If the gasket won't seal the reason needs to found,
anything else is just putting off the ineviatble. The three holes
sound like the thickness indicators - they don't do anything else.
> 3. What is the opinion on gaskets? Use genuine LR ones?
Elring are fine - I think they are OEM for LR anyway.
> 4. After 150,000 miles, and Saturdays limp to a road, what sort of
> condition are my big-end bearings likely to be in? Is it worth
> dropping the sump off and removing the underside shell of a couple of
> con-rods to inspect? I figure this may be easier than lifting out the
> engine if bottom end is still OK!?!?
Worth a look - but usually no harm is done, 200Tdi's are pretty
good at running with bugger-all oil.
> Any thoughts guys?
It might be an idea just to check for play in the valve guides at
that sort of milage - again it's most likely to be absolutely fine,
but no harm in looking. Changing the guide seals while the lid is off
is a good idea.
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