What exactly is "Piston Slap?"
03-19-2003, 12:55 PM
#1
Senior Member
Thread Starter
Join Date: Jun 2002
Location: San Diego, CA
Posts: 499
Likes: 0
Received 0 Likes
on
0 Posts
What exactly is "Piston Slap?"
I've heard that it's literally the pistons rocking in their bores, beating against the cylinder wall. Is this correct? thanks 
03-19-2003, 02:19 PM
#2
のんびり～(´ε｀)
I believe that happens with aftermarket forged pistons that may run a larger piston to wall clearance than stock. They don't expand as quickly as stock pistons, so they tend to be noisy on startup.
03-20-2003, 03:47 AM
#4
Flaccid Member
Join Date: Jul 2002
Location: Seattle
Posts: 571
Likes: 0
Received 0 Likes
on
0 Posts
pistons slap is anytime the pistons do not properly fit the bores and cause extreme sidewall contact.
the forged pistons situation is commonly referred to as "piston rattle" since the tolerances are spot on, but forged aluminum doesnt expand as quickly as cast aluminum.
the forged pistons situation is commonly referred to as "piston rattle" since the tolerances are spot on, but forged aluminum doesnt expand as quickly as cast aluminum.