Hi, can anyone please tell the bolt size and type for the 3 little bolts that bolt this bit to the head? and, My series has blown a couple of head gaskets recently between 3&4 with NO overheating. There are a couple of marks on the sealing surface in that area and I would like to get them cleaned off. I have been using copper head gaskets but I've been told that there are composite gaskets available, any opinions on what to do/which to use??
Thanks in advance, Jack
Swaggie
Sorry don't know the size off the top of my head.
I assume you have a 2.25P? It is a fairly common problem. No harm in getting the head machined as it will also help compression ratio / performance.
Also check the block is flat. I personally think the copper gaskets are best, however I coat both sides liberally with this stuff:
RoverLord
I think they are 5/16" UNF, but I am not sure - the parts book does not give sizes, just numbers.
This assumes it is not a five bearing engine, which will be metric.
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
Hi there, you say that the gasket is blowing between 3rd and 4th ? just check the gasket is the right side up! silly and easy mistake, but it will leak and blow where you describe. Just a thought.
Cheers.
Will.
Thanks for the replies guys, sorry about the very late answer from me,our computer fried itself (just out of warranty of course) and its taken me a while to convince 'er indoors that she would really like a replacement. The guys who planed the head for me recommended that I use the composite gasket, and the thermostat housing bolts turned out to be 6mm, (1984 5 main bearing engine)
Thanks again, Jack
Last edited by jacknz; 10th September 2009 at 11:32 AM. Reason: spelling
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