JE Forged Pistons continued.

[Guest Anonymous]

i am about to call. but i have a few questions to ask...

 

If i O-ring the block will that make a difference and/or is it even needed?

 

For head gasket would you recommand i just use stock? or go with the HKS gasket and if i go with the HKS gasket does anyone have the thickness of that?

 

thanks guys.

-chase

[TimZ]

quote:

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Originally posted by Havok:

If i O-ring the block will that make a difference and/or is it even needed?

 

For head gasket would you recommand i just use stock? or go with the HKS gasket and if i go with the HKS gasket does anyone have the thickness of that?

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O-ringing the block will not make any difference as far as sizing your pistons goes.

 

When you 'o-ring' the block or head, you cut a groove around each cylinder, into which is fitted a piece of wire, which is used as the o-ring. The idea is that since the wire protrudes above the deck surface, it adds extra 'crush' to the gasket around the cylinder, and very firmly holds it in place. This makes it virtually impossible to blow the head gasket. A fair amount of care should be taken in sizing the groove and the wire, since if it sticks up too high, the part of the head gasket that is supposed to seal the water and oil passages won't be able to seal properly.

 

If you use a stock head gasket, then you should probably o-ring either the head or the block. If you use the HKS (metal) head gasket, you should definitely NOT o-ring the head or block. The HKS gasket will not work with an o-ringed head or block. Either approach should work, the HKS is probably easier. As I recall, it's available in 1mm and 2mm thicknesses, possibly more.

 

[ June 17, 2001: Message edited by: TimZ ]

[240Z Turbo]

Well said, the HKS comes in 1mm and 2mm and I have used all 3 combinations, 1mm HKS, 2mm HKS and O-ring block w/ stock head gasket. At this point in time the HKS gaskets are getting outrageously priced as they are a discontinued item w/ HKS. It will probably be cheaper in the long run going with the stock jobber and O-ring. My setup uses SS wire that is actually from a piano, C sharp I believe! HEHE! It crushes into the metal liner of the gasket around each cylinder and sticks out of the block about .010"-.015". The only advantage I see outright is that the stock gasket should better seal around water and oil passages when compared to the HKS jobber. Although I personally never had problems I know of people who had problems sealing these areas. The advantage of the HKS gasket is that it requires no O-ringing and it can be reused several times. I like the O-ring know that I have it done and stock head gaskets from Nissan can be had for about $35 from Courtesy Nissan!