Can anyone identify these pistons?

[Mph]

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Can anyone identify what pistons these are from just looking at them? It is bored .02 if that helps at all. I pulled the head off the block today, and there are some numbers/markings on them I can give those too if needed.



Also these rods?

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And the crank?

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And what kind of valves? Looks stock but just trying to see what I have inside my car! haha

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[RadDsm]

Post the numbers, or just google them and see what you find.

 

[Mph]

The markings are 63d T 11-546 2T and 0.50

 

[whe3ls]

crank valves are stock , rods could be stock, pistons kinda look like wiseco's. heads also a 2g

 

[19Eclipse90]

The rods are original 6-bolt rods installed on an OEM 6-bolt crank; as well, the valves are also OEM.

No clue really on the piston, other than "63dT" being the original denotation of an OEM 6-bolt turbo piston and I'm not certain that notation is carried over to different manufacturers. I will agree they do somewhat resemble Wiseco's.

 

[Mph]

yeah I did some research on the 63d T and it is the OEM piston, and the "T" representing a turbo piston. However I know it was bored out .02

Does that meen it needs bigger pistons or can it run on the stock pistons with larger piston rings? .02 is the slightest measurement. So I am curious to know if it has to have a bigger piston

 

[19Eclipse90]

Mitsu lists oversized pistons for as little as 0.010" (0.25mm) over; piston to cylinder wall clearance has to stay within spec of 0.0012-0.0020" (0.03-0.05mm). Say the cylinder was originally 85mm with an original piston clearance of 0.04mm and was bored out that quarter of a millimeter. That means the clearance is now 0.29mm, way out of spec. For 0.020" (0.50mm) over, you would obviously be worse with a clearance of 0.54mm on original pistons.

So yes, it would normally need to have bigger pistons to make up the difference in clearance. Some situations may require more clearance, but the above piston to wall specifications are for OEM equipment.

 

[joe_mopar]

That must be the marking .5 mm or .020" o/s

 

[Mph]

Mitsu lists oversized pistons for as little as 0.010" (0.25mm) over; piston to cylinder wall clearance has to stay within spec of 0.0012-0.0020" (0.03-0.05mm). Say the cylinder was originally 85mm with an original piston clearance of 0.04mm and was bored out that quarter of a millimeter. That means the clearance is now 0.29mm, way out of spec. For 0.020" (0.50mm) over, you would obviously be worse with a clearance of 0.54mm on original pistons.

So yes, it would normally need to have bigger pistons to make up the difference in clearance. Some situations may require more clearance, but the above piston to wall specifications are for OEM equipment.

So I should probably just measure the cylinder and find out for myself?

 

[19Eclipse90]

If it concerns you that much, yes, you should measure it.

http://www.dsmtuners.com/forums/newbie-forum/385206-piston-wall.html

 

[donniekak]

Is there loctite on the rod bolts?

 

[b00st3d4g63]

Is there loctite on the rod bolts?

Sure does look that way.

 

[BogusSVO]

stock intake valves for sure.. I cant see the exhaust valves face to see if any numbers....

I pet the pistos are NPR over size stock replacemet cast pistons, from the numbers you say are on them... aftermarket forged pistons would not have the stock mitsu part number.. just the makers part number.
rods and crank look stock too

 

[Mph]

Awsome guys, thanks a lot for all the information!

 

[Slowboy]

This is the closest I could find in my system,

NPR 6 Bolt, 21mm Pin, Piston & Ring Combo .20 over- NPR 10-546 2T

Mike Huml