need help for 5 cylinder engine 2.3 lt.

[fatiii]

hi all i ask a quastion,my sleeves between are 5mm.i think to use 034 motorsports copper head gasket..now let's question this distance create any problems?(burn the gaskets vs.)

my idea going to sc6262 35 psi...Waiting for friends who experienced comments..thanks for answers and sorry my english..


this block is not mine it's representation



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[Rusty]

What bore are you running? That will help people answer your question.

[fatiii]

What bore are you running? That will help people answer your question.

sorry i forgot 82.75 mm

[caterpillar]

if the gasket are in the combustion chamber, they WILL burn out, due the use...then you will have the leak and bad engine... some use the 83,00 gaskets..

[fatiii]

if the gasket are in the combustion chamber, they WILL burn out, due the use...then you will have the leak and bad engine... some use the 83,00 gaskets..

gasket bore 83 mm piston bore 82,75 so can not in the combustion chamber.

[fatiii]

upppppp..waiting comments

[fatiii]

Does anyone know anything?

[fatiii]

uppppp,i need help

[fasterthenrs2]

Just buy a stock mls gasket and bore that to your spec

[JP]

First of all let's look at headgaskets.

Stock 20v turbo MLS = 82mm bore
Stock 7A Fibre = 83.5mm bore

Next engine bore size

Stock 20v turbo = 81mm bore
Stock 7A = 82.5mm bore

Conclusion if you wish to run larger than 82mm you should either run a copper gasket or a fibre gasket. In both cases you need to o-ring the block to prevent gasket failure.

Personal opinion is don't run more than an 82mm bore if going FI for ease and reliability. Also the larger the diameter the piston the more susceptible you are to rapid small end bush wear especially if running aftermarket rods without rifle drilling for direct oil pressure feed.

Now this means either you junk the 7A block and source a 20v turbo one or you fit sleeves to the 7A. Either way there is not much difference in cost by the time you pay for the more expensive copper gasket and o-ringing procedure.

Hth JP

[JP]

*sorry forgot to mention if you overbore a stock MLS gasket you will end up machining the fire ring which helps seal the combustion gases. Without the firing ring you may aswell stick in a copper gasket without o-ringing they'll both be as useless as each other.