disassembling 1GGTE Pistons?

[sanchez]

quick question, i need to disassemble my 1g pistons from the conrods because i'm going to get them ceramic coated and i can't see as to how they come apart. Do i need a special tool or is there some special knack to it? Thanks guys

[roadsailing]

if they are anything like 4AGE etc pistons, they will have a circlip either side of the gudgeon pin that you will need to remove.

if they are fully floating you can just take out one circlip and the gudgeon pin will come out.

if they aren't fully floating, you will need tp press them out of the little end (like a 4AC)

post some pics, or wait for someone who knows their 1Gs.

[o_man_ra23]

If you need to press them out, heat up the small end of the con rod before you press them... I cant see this being the case tho, as most decent engines run floating pins, with the circlips as stated. they should still be heated slightly to pull the pins out (suggest oven at 100 deg Cel for this job)

Cheers, Owen

[Hydra]

http://cygnusx1.net/supra/library/TS...em/EM_049.html

That should help a little too

[jeffro ra28]

Heating is not usually necasary for removing press fit rods.
However for refitting them, they will need to be heated with the proper element. An engine builder or reconditioner will be able to do this.

[sanchez]

thanks hydra! exactly the infor i was after! some rep for you

[mic*]

How does ceramic coating the pistons effect bore clearance rings used etc...

[Mr DOHC]

ceramic coating is extremely thin, barely measureable

[mic*]

So what its negligable?

And also is it really a good idea??? What are peoples experience's? I would think you would end up with less heat being conducted away from the combustion chamber, ie less through piston and into crank and oil etc means more heat in head & uppercylinder. The outcome being that you would lower the knock threshold and have to retard timing or increase octane to compensate.

DOHC - if you had 1mm less pic on the bottom of that avatar twould just look like she has her hands on her knees. i think i liked the old one better. More seductive...

[mic*]

And also is it really a good idea??? What are peoples experience's? I would think you would end up with less heat being conducted away from the combustion chamber, ie less through piston and into crank and oil etc means more heat in head & uppercylinder. The outcome being that you would lower the knock threshold and have to retard timing or increase octane to compensate.

Anyone?
.............

[jeffro ra28]

So what its negligable?

And also is it really a good idea??? What are peoples experience's? I would think you would end up with less heat being conducted away from the combustion chamber, ie less through piston and into crank and oil etc means more heat in head & uppercylinder. The outcome being that you would lower the knock threshold and have to retard timing or increase octane to compensate.

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