Gaskets should be fitted as supplied. A very light application
of non hardening sealer can be applied around oil gallery eyelets keeping away from actual hole centre, (not Rover
"K" Series). We emphasize light application as only a smear should be applied. Assembly of parts should
be immediate to prevent solidification of the applied compound. If sealer is applied generally to a gasket then
you are actually jacking the block and head faces away from the gasket. Lack of crush / clamp to the fire ring
will result and gasket failure will be very quick.
Follow Gasket Manufacturer / Supplier instructions and use sealers
only when recommended.
SUPPORT / PAD / HEAT SHIELD
Semi circular cut out in fire ring bore.
Loose pre-combustion chamber.
Diesel engined motor cars in recent years have become common
place throughout Europe. Indirect injection engine feature "Ricardo Chambers" or pre-combustion Inserts"
where the initial detonation charge is fired. These chambers are only an interference fit in the cylinder head
face and over a period of time can become loose. Detonation chatter can then cause the loose chamber to cut its
way through the gasket to total destruction. Further block face damage 8 certain damage to the head will result.
When replacing a head gasket take professional advice as to tightness
of pre-combustion chamber. Replacement of same or fitment of oversize units can prevent detonation chatter and
the possibility of a complete engine change.