Head Gasket size

ian

ian

Member +
I've decided to change the head gasket and carry on with my car instead of breaking it now.

It currently has a 1.6mm h/g and the only replacement i can find is the cruise one which is silly money.

Athena do a 1.4mm and a 1.9mm which one should i go for and what efects will it have on the car ?

Thanks
 
HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
what head bolts are you running? also what type of pistons do u have? if u have dished pistons & arp head bolts i wouldnt go for anything over 1.2mm to reduce the chance of blow-by and keep as much respose u can, in a lower cr engine :)

kon
 
ian

ian

Member +
Cheers Kon, I will be using ARP head bolts, the pistons are JE, the only info i have on them as i brought the engine 2nd hand is that they are oversized but same spec as standard ??
 
HYBRID

HYBRID

Super Moderator <a href="http://www.toyotagtturbo.
in that case if they are stock sized id go for a 1.4mm ...

it keeps things safe yet crisp at the same time :)

kon
 
G5EGM

G5EGM

Lifer
oh this just wot im need to know.....

im lookin to upgrade my headgasket but dont know wot thickness to go for as i dont know exact compression ratios.

iv got a standard engine, running hybrid turbo @ 1 bar with all support mods.

please help :)
 
madman

madman

Member +
standard gasket will do fine which is 1.2mm of a metal one if you want to spend the extra money one but the block and head have to be perfectly flat for a metal one
 
thefalls

thefalls

Member +
Erm,stock head gasket is 1.2mm and when compressed its 1mm.
Whereas the metal head gasket will not really decrease in size when compressed.
 
G5EGM

G5EGM

Lifer
ok kool...think this helps.

does anyone know what standard comp ratios are?

also wot is the TRD one compared to standard?

thanks...rep added :)
 
A

AdamB

Member +
The TRD one is 0.6mm, it helps bring the CR back up, it stops the engine being lazy off boost, which is what can happen if you have a too thick headgasket :)
 
E

elton

Member +
HYBRID said:
what head bolts are you running? also what type of pistons do u have? if u have dished pistons & arp head bolts i wouldnt go for anything over 1.2mm to reduce the chance of blow-by and keep as much respose u can, in a lower cr engine :)

kon
Click to expand...

Just saw this post. For my own knowledge, how is blowby related to compression? Would really appreciate a reply as I've been scratching my head on this question
 
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