How to Stretch an FJ20 .

[DR30RS]

Hahaha smart ass  What i was trying to say is the whole rattling of the forgies around in the bores can't really be that good for them can it??  Or has the whole fact that there is increased amounts of silica being used now meant that the cold piston to bore tolerances can be decreased meaning less piston rattle when cold????

You got it.Clearances are tighter and the pistons expand less.Years ago you would have had a heavy breathing,rattling donk with limited life.Its all good now

[Boof]

You got it.Clearances are tighter and the pistons expand less.Years ago you would have had a heavy breathing,rattling donk with limited life.Its all good now

Ahhhhh sounds more like i wanted to hear!! I want to run forgies in my FJ, but i didn't wanna kill blocks with the whole piston slapping when cold issue!!! Its goin into storage soon anyways whilst i pay it off and get my own place...Then we look @ rebuild or something

[0HR-30T]

Yeah,like what has been said above,they still rattle slightly,but not like old school forgies. I would've thought that the rings would cop more hammering when cold,than the bores...especially as mine have 1.2mm low friction ones.Seems to be sweet though,and I had no issues using it as a daily driver...

[discopotato03]

Can someone PLEASE tell me what headgasket to use with 91mm pistons , is the standard one big enough .

[0HR-30T]

Standard gaskets protrude.Mine's a custom one,but I think an FJ24 gasket would do the trick (?)

[discopotato03]

Where did you find the Gasket and what does it cost ? Also are you using the wire rings between the gasket and the block ?

[0HR-30T]

Pav-Tek sourced my gasket,when they built the engine....so I can't help there.I'd imagine Ridgecrest or similar would be able to whip one up. I've seen FJ24 head gaskets available from somewhere,but like an idiot,I didn't write down where it was.......Try stew wilkons maybe?

and yes,my motor is o-ringed,if that's what you mean?

[Doctor 30]

we make copper head gaskets at my work but they aren't cheap and done on as required basis and you have to specify the material and thickness and how much bigger you want the bore holes. A sample gasket or proper drawing would be needed (or even better a cad file)

Oh yes it is quoted and then upfront payment required and there are no guarantees. Tempting isn't it