Scratch on pistion sides

[Guest Anonymous]

Hi-

After cleaning 4 cylinder pistons, I noticed that there are vertical scratches on opposite sides below the rings on all 4 pistions, but two are worse than other two. Also two pistions top edges are pitted slightly on one side (not 90 degree angle but slightly rounded and pitted). Does it mean they need to be replaced?

Also, if you know - what caused the scratched pistons and pitted rounded edges on two pistons, if other being old and worn? I am trying to see if there are other parts I should look into that could cause the problem as listed above.

Thanks-

Jim

[Guest Anonymous]

(nt)

[Guest Anonymous]

vertical scuffing on piston skirts is usually from pistons rocking in the bore ie worn older motor, but can be caused by other things also.

the pitting may be from detonation. have your heard your car "pinging", does it loose lots of power on hills etc?

may also have digested somedamnthing in the intake and it bounced around a little before going out an exhaust valve.

good luck,

b

[Guest Anonymous]

Thanks-

I bought the car a few months ago and it had no power at all with compression reading of 30 to 60. Obviously, I am rebuilding the engine and I had no idea how many miles on the engine. I was just concerned if I should re-use the pistons with the vertical scuffs and minor pitting.

I will try to get pictures of the pistons sometime today.

Jim

[Guest Anonymous]

questinoable parts (by some folks standards) and they worked fine for a longdamntime, but it really comes down to $ in your pocket and how much "insurance" you get with new parts. the old ones may not make as much power but they may be perfectly adequate for your needs.

If you reuse the pistons, by all means smooth em up before using them and make sure the block is clean and smooth also.

Best of luck with it,

Britt

[Guest Anonymous]