just wondering..is there a difference in the between piston # 2 nd #3 at TDA (top dead center)? my mechanic pointed that out to me that my piston # 2 is 2mm lower than the #3 piston..is that a normal thing
i would appreciate all the help that i can get

 

wow, 2mm difference.... possible bent rod.

1-4 pistons are the same.

 

Two millimeters isn't all that much considering the junk that can collect on the top of pistons.

 

If it's just carbon build up that's making it a 2mm difference, it's not a big deal. You can scrape it off the piston just fine. BUT if it's just measuring the pistons, than it's a big difference and there could be a problem. As what Aby said, could be a bend rod.

 

2mm = ~.080

a oem gasket is ~0.047 / 5 layer... if the piston is below the deck by ~0.020, the piston w/carbon would be hitting the squish band portion of the cylinder head.

 

but it doesn't bind or resist when rotating by hand any of the pistons

 

what does a compression test show up?
if the piston is physically lower because the rod is bent, the compression on that same cylinder will be low

 

we dont know that yet because the motor is taken apart..im actually changing my head

 

here are some pics

 

I would suggest disassembly to inspect. That is not normal and there has to be a reason for it.

 

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