LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Piston Slap...

Thread Tools
 
Search this Thread
 
Old 01-23-2010, 10:52 AM
  #1  
TECH Enthusiast
Thread Starter
iTrader: (5)
 
happysem's Avatar
 
Join Date: Jun 2009
Location: McKinney, Tx
Posts: 732
Likes: 0
Received 0 Likes on 0 Posts
Default Piston Slap...

I have a question, can LT1s get piston slap?

Is this common?

Of course when I fix something, I get some bad juju noises on first startup.

So sick of this car lol.
Old 01-23-2010, 11:06 AM
  #2  
TECH Senior Member
iTrader: (2)
 
RamAir95TA's Avatar
 
Join Date: May 2005
Location: South Jersey
Posts: 9,467
Likes: 0
Received 6 Likes on 6 Posts

Default

All engines have some degree of piston slap, some worse than others.

Describe the noise you're hearing (or take some video).
Old 01-23-2010, 11:24 AM
  #3  
TECH Junkie
iTrader: (12)
 
1badzee's Avatar
 
Join Date: Sep 2007
Location: SFL
Posts: 3,012
Likes: 0
Received 0 Likes on 0 Posts
Default

What's a juju?
Old 01-23-2010, 12:05 PM
  #4  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,260
Received 58 Likes on 51 Posts

Default

Originally Posted by 1badzee
What's a juju?
^^R u seroius? You dont know that a juju is?

It's like a Snipe but smaller.. you ever been Snipe Huntin?
Old 01-23-2010, 12:10 PM
  #5  
TECH Enthusiast
Thread Starter
iTrader: (5)
 
happysem's Avatar
 
Join Date: Jun 2009
Location: McKinney, Tx
Posts: 732
Likes: 0
Received 0 Likes on 0 Posts
Default

I'm probably the worst person to try to imitate a sound, so I'll take a video, give me a few minutes.
Old 01-23-2010, 12:18 PM
  #6  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,260
Received 58 Likes on 51 Posts

Default

Originally Posted by RamAir95TA
All engines have some degree of piston slap, some worse than others.
Man some of the Short-Skirt LS ones are nuts..expecially the ones with a lil too loose bores.
Old 01-23-2010, 12:26 PM
  #7  
TECH Junkie
iTrader: (12)
 
1badzee's Avatar
 
Join Date: Sep 2007
Location: SFL
Posts: 3,012
Likes: 0
Received 0 Likes on 0 Posts
Default

I've just never heard of a juju, especially used to describe a sound coming from an engine.. I apologize for my ignorance.
Old 01-23-2010, 12:30 PM
  #8  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,260
Received 58 Likes on 51 Posts

Default

I told ya what it was..
Old 01-23-2010, 01:49 PM
  #9  
9 Second Club
iTrader: (3)
 
mdacton's Avatar
 
Join Date: Nov 2006
Location: Goochland, Va.
Posts: 644
Likes: 0
Received 0 Likes on 0 Posts

Default

does it go away when it warms up?
Old 01-23-2010, 03:12 PM
  #10  
Launching!
 
rkinney's Avatar
 
Join Date: Dec 2004
Location: Hebron, Oh
Posts: 284
Likes: 0
Received 1 Like on 1 Post

Default

I bought my 93 Z28 used in 97 with 78,000 miles on it. The first winter I noticed a cold start knock, but went away when it was warm. Took it to the dealership and they replaced the engine under GMPP warranty. The new engine did the same thing when it was cold, but only in the winter months. I figured it was common. GM had the same problems when the new trucks and suvs came out with the ls motors. Good thing about my engine replacement was the fact it ended up being a 4-bolt main block.
Old 01-23-2010, 03:16 PM
  #11  
TECH Enthusiast
Thread Starter
iTrader: (5)
 
happysem's Avatar
 
Join Date: Jun 2009
Location: McKinney, Tx
Posts: 732
Likes: 0
Received 0 Likes on 0 Posts
Default

Can't upload to anything for some reason, anyone want to send me their email and link it up here for me?
Old 01-23-2010, 09:24 PM
  #12  
TECH Veteran
iTrader: (12)
 
wrd1972's Avatar
 
Join Date: Mar 2006
Location: Central Kentucky
Posts: 4,649
Likes: 0
Received 3 Likes on 3 Posts

Default

I have never heard a stock LT1 slap but its common in LS1's. My forged motor has just a hint of it but its gone in 2 minutes. Its more common, but not a problem, with forged pistons.

Piston slap does not sound like a knock or click BTW, its more of a rubbing or scuffing sound.
Old 01-23-2010, 09:24 PM
  #13  
TECH Veteran
iTrader: (12)
 
wrd1972's Avatar
 
Join Date: Mar 2006
Location: Central Kentucky
Posts: 4,649
Likes: 0
Received 3 Likes on 3 Posts

Default

Originally Posted by rkinney
I bought my 93 Z28 used in 97 with 78,000 miles on it. The first winter I noticed a cold start knock, but went away when it was warm. Took it to the dealership and they replaced the engine under GMPP warranty. The new engine did the same thing when it was cold, but only in the winter months. I figured it was common. GM had the same problems when the new trucks and suvs came out with the ls motors. Good thing about my engine replacement was the fact it ended up being a 4-bolt main block.
Wow that was good deal.



Quick Reply: Piston Slap...



All times are GMT -5. The time now is 07:26 AM.