Blown Head Gasket.

[Italiazr1]

I wanna Know what head gasket is the best to use on my rb20 running 20psi 240 - 260rwkw

Ive blown two gaskets on my car since having it into cylinder 2

once when the car was fairly stock

and now ive built my car ive blown gasket yet again what can i get to stop this happening?

i think we used a genuine nissan one (supposedly pretty good for power im making But yet i prove everyone wrong)

My luck just sucks......... What are the main causes of a head gasket Blowing???

Any help......... what can i use top of the range?

[R31Nismoid]

Who put the motor together? I'd be squarely asking them this question (it should not have blown)

If its all machined up properly, even and so on, you should not be blowing gaskets.

Stock one should be fine, its fine for everyone else

If its also blown out @ the same point - then that is even more indicative that the surfaces are uneven.

[Italiazr1]

mmm ok

i know there isnt any cracks in head or block cause we had it all checked at the last build

i need a new cylynder head now anyway cause the head has some detonation on it too

so it needs to be all machined again to fit

is there any other causes??

[R31Nismoid]

Well if you've had detonation... i do indeed believe this can kill a head gasket.

But if the valves have noticeable detonation... then what do the pistons look like? If you've damages values/head then there must be some evidence on the pistsons.

IMO it sounds like the setup needs to be totally looked at in more detail and carefully, this is the reason the gasket has died. Not because its a Nissan one.

[Italiazr1]

ok well that may explain it then

what happened was my fuel reg went on me about 3 - 4 months after the build

i i must admit i did drive it pretty hard for a bit once the car was all run in ect ect

we put it up on the dyno and found it to be leaning out at the time

we fixed it and hoped for the best

i suppose this is the result and yes even the piston in only cylinder two is damaged

im rebuilding again as we speak

[R31Nismoid]

So it's not really bad luck then?

[Italiazr1]

well it is bad luck if the fuel reg sh..t itself out of the blue

how reliable should an engine like this be?

answer is not very i suppose.

just wanna prevent it happening again i should be able to track this car if everthing is right

what do you think of a different head gasket? metal or copper?

what running gear do cars need to run big boost? say 40 psi

im only running 20psi nothing more but i am still having problems

[R31Nismoid]

Very reliable IMO. Well, obviously parts will fail here and there, 15yr old car it's to be expected.

A fuel reg dying shouldn't kill a motor mate. I've had two die, they just over fuel to the shizen... they should not go the other way and lean out i don't think?

[Italiazr1]

ok i didnt know that.

i think at the time the car just didnt feel right and he threw it on the dyno and thats what he told me

the fuel reg went and it leaned out a little

but he wasnt really worried about it cause the car seemed ok

but its just now since the gasket went and leaked water into the cylinder

by the time ive seen water temp go up damage is already done

[W0rp3D]

What sort of management are you running, if you have a power fc with the hand controller mounted in the cabin you would have been able to see the knock go up and then be able to do something about it, at the least you should have an afr gauge which would have shown it leaning out and you could have done something about it before blowing the head gasket, although you say its bad luck remember the old saying "Luck favours the prepared".

Also i would recommend machining the head and block to make 100% sure you have a good mating surface.

Edited August 16, 2009 by W0rp3D