Luis de Prat

A guy on another forum has cracked his 924S engine open only to find the cylinders sleeved and scored.

Please correct me if I'm mistaken, but I thought these engines came from the factory with Aluminum Silicon blocks bored and Nikasil treated with no sleeves?

TIA

schwank

That is correct to the best of my knowledge.

krystar

i certainly don't see any sleeves on my 944NA block.

i thought it was alusil?

M758

correct. No sleeves. At least not when new.

If you are looking at the lines on the top of the block that is dirt. Outside is dirty from the head gasket and the inside is cleaner from the metal fire ring.

cruise98

those look like factory Alusil bores to me. I do not see any sleeves.

StoogeMoe

Never sleeved and all Alusil. No Nikasil on the 944.

Olli Snellman

No sleeves in that block.Typical Alusil block.

Darwantae951

HUUUUUUUUUGE PICHURES!

Looks normal to me, too.

tyro

optical illusion.

Mike C.

They never came from the factory with sleeves...

944Ross

Good god what kind of swamp water was used in the cooling system??

Dare

What's up with that weird spot on the outside of #2 (right next to the head stud)? It looks corroded.

DarylJ

That's what coolant with phosphate/hard water/not changing your coolant enough does.