Sewing machine noise on cold startup?
01-22-2008, 07:14 AM
#2
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,254
Likes: 0
Received 1,687 Likes
on
1,208 Posts
A heads/cam car will usually do this even once warmed up. Even many stock LS1s have a bit of the sewing maching sound. It's a combo of noisy valvetrain, and loud injectors.
The noise most people hear on cold start only is piston slap, which is different from the sewing machine sound that's usually heard even once fully warm.
The noise most people hear on cold start only is piston slap, which is different from the sewing machine sound that's usually heard even once fully warm.
01-23-2008, 08:21 AM
#7
TECH Veteran
iTrader: (18)
Join Date: Sep 2005
Location: SW Houston
Posts: 4,192
Likes: 0
Received 0 Likes
on
0 Posts
its just piston slap, and rocker arms working.
Thicker oil, wouldnt really take care of it.
LS1s are noisy lil suckers, just get use to them cause thats just how it is.
The def. fix for this is a lopey cam and a nice True dual exhaust...then you wont hear the ticking any more!
Thicker oil, wouldnt really take care of it.
LS1s are noisy lil suckers, just get use to them cause thats just how it is.
The def. fix for this is a lopey cam and a nice True dual exhaust...then you wont hear the ticking any more!
Trending Topics
but +1 on letting it warm up first before you go out and beat on it.
01-23-2008, 08:52 AM
#9
TECH Resident
iTrader: (11)
Join Date: Aug 2004
Location: Southeast of Disorder
Posts: 806
Likes: 0
Received 0 Likes
on
0 Posts
MIne was pretty quiet with the previous springs on mine with a TR220/220-551/551. Got really loud after I had the Patriot Dual Gold springs installed. Def. has the sewing machine now. The "slap" on start up has been there since I bought it. I'm used to it from my 02 1/2 truck. Cold mornings it sounded like a coffe can full of rocks. 
...nice. 