Blue2002SS

iTrader: (13)

I am in the process of H/C swap and the car has 50,000 miles, I think it has been running rich for a while now. What do you think of these pistons, It looks like a lot of buildup to me, and one looks rusty???

opinions please........

01ssreda4

iTrader: (96)

Looks normal to me......except for the rust. Most if not all engines will have carbon build up like that on the piston tops.

LSjim

iTrader: (8)

defintly dont worry bout it mine looks the same

O2Form

Looks ok but pistons don't rust, were you using any coolant? Were you using any fuel additive?

Jontall

Looks like you don't use a PCV catch can.

vettenuts

iTrader: (4)

Carbon looks normal. The "rust" spot looks like something spilled, maybe when you pulled the heads? Or is it a spot of missing carbon?

COSTIGAN86

iTrader: (8)

carbon is normal, and yours isn't that bad.

Blue2002SS

iTrader: (13)

Ok I feel a lot better, thanks for all your replies. And that rusty looking spot is a place where there is no carbon buildup,,,, I still dont know why its rusty looking, I never use fuel additive.

Oh well, the project goes on. Today I got the solid motor mounts in and the new cam went in. Tomorrow heads go back on and bolt everything up

vettenuts

iTrader: (4)

Your head gasket "may" have started leaking. One thing that coolant will do when it enters the combustion chamber in small quantities is clean all the carbon.

O2Form

I really didn't want to say this but if it was mine i'd be looking for cracks in the head or cylinder liner. That piston had coolant on it.

studderin

iTrader: (28)

looks normal, but Im with vett nuts for looking into what might be.

did that plug look different. if you didnt keep them numbers, dose one look diffrent?
is that the only hole with piston top like that?

O2Form

I think i know what it is, I think its stained . carefully clean off another piston and see if it looks similar.

Blue2002SS

iTrader: (13)

That is the only piston with the "rust", the others are all about the same with some carbon buildup on them.

All of the plugs look good, they only have about 6-8K miles on them.


This is a pic of the head from the "rusty piston"


and the spark plug up close

00MaroonZ28

iTrader: (3)

Look like it's just stained. I wouldn't worry about it. Just clean up the tops.

O2Form

somethings going on in that cylinder, have the head checked for cracks.

BlackScreaminMachine

iTrader: (17)

WD-40 and Scotch Brite Green or Red pads works wonder on combustion chambers, deck surface, block surface and tops of pistons. Whend done, hit with Real Brake Cleaner and wipe down with a low fiber yield towel and unless the heads have been warped, you should not need anything more.

The Piston color looks like a stain, but again that will be done once you clean them up. Also get a catch can when you have a chance, it should reduce any future build up.

sjose888

looks normal except for the rust.

G Engines

The edge of your intake seat look a bit rough in the second pic between the intake and exhaust seat have it checked out while it is off the engine already.

406ci68camaro

+1 on the Aluminium dont rust otherwise looks normal