GASKET - FAULT FINDING

 
APPLIED SEALER  
 
FEATURES:     
Unsightly and Unprofessionally applied sealer.
CAUSES:     
Incorrect application of sealer.
 GENERAL:  
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.
REMEDY:   
Follow Gasket Manufacturer / Supplier instructions and use sealers only when recommended.
   

 
 MISSING PRE-COMBUSTION
SUPPORT / PAD / HEAT SHIELD
 
 
FEATURES:     
Semi circular cut out in fire ring bore.
CAUSES:     
Loose pre-combustion chamber.
 GENERAL::  
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.
REMEDY:   
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.