piston slap question

**slpws6ta** · 12-31-2006, 11:38 AM

I have a 2000 ws6 m6 with 75k on it i am in the process of rebuilding the engine because the piston slap ( or what i belive to be piston slap) has become unbearable. i will know soon enough what the noise is for sure but is there anything i can do, short of a resleeve and pistons, to get rid of it if it is piston slap. I am an auto tech and i do all my own work but i work for toyota usually if i get a car with piston slap I pull the head and the cross hatch is worn out of the cyliders at which time it gets a short block. I'm going to be ordering a cam kit, clutch, flywheel, 4.10 gears and such but if i cant get rid of the piston slap I want to know so i can order a bare block. Any input from any one who has been through this would be greatly appreciated thanks

**Danger731** · 12-31-2006, 11:53 AM

seems it does not hurt the LS1 motor so no one tries to correct it, do a search.

**slpws6ta** · 12-31-2006, 02:35 PM

i have done extensive research and motors with piston slap have short "life expectancy

**slpws6ta** · 12-31-2006, 02:36 PM

shorter not short

**willing to race** · 01-01-2007, 05:47 AM

It is my understanding that piston slap was due to the short skirts of the pistons and weak rings. Replace the pistons and your motor will quit slapping.

**willing to race** · 01-01-2007, 01:31 PM

That's what I meant

**vettenuts** · 01-01-2007, 01:58 PM

There was a piston update in the spring of 01, which included coated pistons. Are you using these in the rebuild? If you have it down that far, have you considered a forged bottom end? Might not get rid of the slap (forged pistons require a bit more cold clearance) but it would be a lot stronger.

**juiced99ws6** · 01-01-2007, 04:32 PM

Originally Posted by willing to race

It is my understanding that piston slap was due to the short skirts of the pistons and weak rings. Replace the pistons and your motor will quit slapping.