I have a main knock :(

Reply Subscribe

Thread Tools

Search this Thread

Sep 19, 2000 | 12:08 AM

IrocManiac

Thread Starter

Member

Joined: Apr 2000

Posts: 213

Likes: 0

From: Ok, USA

I have a main knock :(

Well guys I was informed that I had a main knock on cylinders 3 or 4. I knew I had it because at times I can actually hear it. They estimate only about 20k miles left in it before it lets go. Does that sound about right???

------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

Sep 19, 2000 | 08:25 AM

blak92!

Member

Joined: Sep 1999

Posts: 175

Likes: 1

From: NortCentral NJ, USA-

Check the timing chain. Make sure it is not slapping around the timing chain cover. That makes a nice knocking sound. I had that similiar problem a few years ago.

Sep 19, 2000 | 01:32 PM

wm_sorg

Senior Member

Joined: Dec 1999

Posts: 954

Likes: 1

From: Annandale, VA

Car: 1991 Formula Firebird

Engine: 2001 LS1 Modded

Transmission: 2001 4L60E Yank SS3600 TC

You might want to consider a heavier weight oil as well. It will help cushion the knocking if it is a journal bering.

If you have an oil pressure guage unusually low oil pressure is also indicitive of a worn bearing.

Good luck.

Sep 19, 2000 | 03:55 PM

IrocManiac

Thread Starter

Member

Joined: Apr 2000

Posts: 213

Likes: 0

From: Ok, USA

I do have low oil pressure at times. Sometimes it is about 15 then other time it runs at a constant 25 or so. My mechanic said there was a short in the guage which caused that. As soon as I nail it thought the oil pressure goes up to 60.

------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."