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Replacement Head Gasket (RB20DET)

46n2

By 46n2,
in Engines & Forced Induction

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46n2 Mentor

46n2

Posted
Posted

Well, apparently I'm running on 5/6cyl's because my head gasket is mildly blown. Time for a new one...

What's the difference (advantagesdisadvantages) of a copper head gasket compared with the factory gasket?

Some **** at what is probably the only imported spares places in sticksville told me that the only difference is the way they look and it really comes down to personal preference. That just sounds STUPID!

So can anyone give me the real deal?

Also,

What sort of damage can be done to the engine from driving with a blown head gasket?

46n2:burnout:

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https://www.sau.com.au/forums/topic/7533-replacement-head-gasket-rb20det/
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46n2 Mentor

46n2

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Posted

:eek: " if it gets as bad as taking water into the bores (bent conrods etc) "

See it all started when it was running lumpy (missing on #6). So we changed the plugs, checked the coils, checked and cleaned the injectors, compression test(?) on radiator, compression test in cylinders.

The wierd thing is that the Compression test came up OK, and so the mechanic came to the conclusion that it was only leaking under load... Would the damage to the rest of the engine be as bad as a gasket that was shot entirely???

46n2

teka Enthusiast

teka

Posted
Posted

"compression test(?) on radiator"

Yep, they pressure tested the cooling system.

Sometimes there can be a "slow leak" when water leaks into the combustion chamber, hence there is no water apperas in the oil (evaperated), Copper gasket take more compression, also thicker (generally), do a search for more info. As I said before the gasket will get NO better, only worse, you risk damage if you it gets worse. Compression test would come up ok, as would a leak down test.

teka Enthusiast

teka

Posted
Posted

torque wrench is always a good idea:) , and all the torque settings, timing etc, I would get someone to help you that knows there shit. Or you could get a workshop to do it.

You would also want to confirm that it is the head gasket that is causing the motor to run 5/6, (could be coil etc, just an example):)

  • 3 weeks later...

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