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Changing Pistons

ZILR-34

By ZILR-34,
in Engines & Forced Induction

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ZILR-34 Experienced

ZILR-34

Posted
Posted

hi guys

I have a R32 gts-t and had the engine reco'd about 2months ago to standard spec. I made a big mistake not putting in forged pistons in. my question is which might sound abit dumb :P

is it possible to change the piston's with out taking off the head again and pulling out the motor? e.g., like put the car on a hoist and taking off the gearbox, oil pan and oil pump. And unblot the crank and pulling out the pistons.?

cheers

bill

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skylinekid Proficient

skylinekid

Posted
Posted (edited)

nah mate head has to come off. cant drop them out the bottom. generally u have to take motor out again put on a stand take head off take sump off and one by one unbolt bigends and slide pistons and conrods out the top. a fair ole job to wanna go and do now. basically strip it back to a bare motor pretty much. if u got bucket loads of money go nuts.

Edited by skylinekid
GTRsean Grand Master

GTRsean

Posted
Posted

No problems just cost time and money for labour, new gaskets, sealant etc, but you will need to hone the bores to suit the forged pistons to get piston to bore clearance right and bed in rings as far as I know.

260tech Proficient

260tech

Posted
Posted
hi guys

I have a R32 gts-t and had the engine reco'd about 2months ago to standard spec. I made a big mistake not putting in forged pistons in. my question is which might sound abit dumb :P

is it possible to change the piston's with out taking off the head again and pulling out the motor? e.g., like put the car on a hoist and taking off the gearbox, oil pan and oil pump. And unblot the crank and pulling out the pistons.?

cheers

bill

Hi there, apart from cast pistons, what kinda big mistake? Effective life of motor after big mistake? Like can yurun with a de-rated motor for the intended purpose for a while (like 40k's) or is the intended purpose gunna foobar it? If the latter is the case then pull motor out, strip it down & fit gear that will achieve yor purpose. Most cost effective option.

Cheers GW

ZILR-34 Experienced

ZILR-34

Posted
  • Author
Posted

my car is already pushing 232rwkw's and i dont think it will last to long. i know that u have to put the pistons through the top. but i cbf pulling everything out again. i dont see the difference would be if u go through the bottom?

cheers

bill

James_03 Mentor

James_03

Posted
Posted

Your probably better off sourcing another bottom end, then building that up in the mean time.

At least that way your not without the car for weeks on end while you take it all out. Could probably just sell your bottom end on them to re-coupe costs. If its making that power now and the tune is good there is no reason why it shouldn't last.

Cheers.

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