im just interested as to why EA's, (and probably other E series falcons) blow head gaskets rather often compared to normal cars? i wanna get an EA but i hear fairly often that ill have to replace the head gasket every 50,000km or so and thats something i really dont wanna fork out lots of money for. Whats the cause of the head gaskets blowing and why do they blow more often then in most other cars? Also what can be done to stop them from blowing or slow down the process?
The head gaskets only go at around 200,000km. This is mainly due to the aluminium head which tends to warp over time allowing the head gasket to blow out. It can also be due to corrosion in the head from either using bad coolant or not changing it enough. Shouldn't really worry about it, just keep good quality coolant in it, and if it does blow, get the head reconed and put an AU head gasket and AU head bolts in, and you will be fine for another 10 years.
These engines are suspectible to overheating so its imperitive to keep the cooling system in A1 condition. Let em overheat to many times and your head gasket blows.
The dreaded 'dancing temp gauge' is a problem too, usually caused by an incorrect thermostat, these donks need a dual acting thermo with a small hole that allows water to seap past when the thermo is closed. What happens during warmup with incorrect thermo is -
cold engine, thermo closed, coolant warms up, thermo opens, cool coolant comes thru and thermo closes, engine temp momentarily gies thru the roof, thermo opens again - this cycle continues a few times until stable - this isn't good for the head as it is constantly being heated/cooled.
A common reason for multiple head gasket failures on the one engine is skimping on the job, this donk uses Torque To Yield head bolts that are designed to stretch, in practise they are good for use once and throw away so if you get a head job enusre new head bolts are used.
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