Re: Cylinder Head Cracking

Maybe stress from alternator or other mounts? Not sure the UK 185 is the same celica (3S-GTE?):

In the vicinity of the alternator mounting the cylinder head is prone to cracking. 185s were fitted with a different style engine mount and an additional stay to help prevent this from occurring - picture. Click here for a picture of a cracked head

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Hi, > > I was hopeful that someone might be able to give me a different insight > into a problem that occurs with my dads celica. > The car has an issue where that around every 150000kms it cracks the > head into either the number 2 or 3 exhaust port. the engine is a 3S-GE > with TVIS. The only mods are a cold air intake to feed the factory air > box and a set of tri-Y long primary exhaust headers. > The car has done it to 3 heads so far and always the same problem. The > engine runs fine when the head cracks and still produces full power it > just pumps the radiator into the exhaust with a cloud of steam. > It has also has had the engine changed the last time it happened to a > jap spec motor. The car has had the water pump, the thermostat and the > radiator replaced that the car never has any heating problems. > It usually has the oil changed every 5000kms with the longest it's been > being 7000kms. The car does a lot of highway driving occasionally towing > a lightly loaded trailer. On average it does about 800kms per week. > About the only thing that has happened to the car other than normal wear > and tear is that the heat from the exhaust warped the blades on one of > the radiator fans. > The only thing I can think of is that the head gasket it not allowing > correct water flow to the head and causing a hot spot which causes the > cracking, But I'm not convinced this is the cause and the head gaskets > used are identical in water flow holes to the factory Toyota one. > > If anyone has any ideas as to what could be the cause I'd be grateful to > fix this problem as my dad would like to keep using the car for work for > as long as possible. > > Nick
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johngdole
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