LS1 240sx with a problem - please help!
Thread Starter
Teching In
Joined: Nov 2007
Posts: 48
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LS1 240sx with a problem - please help! I have a 98 240sx with a 2002 Camaro LS1 + cam + dual valve springs and many other suspension and handling goodies.
Problem is, the car, when cranked up, sounds like there is severe scraping/knocking (no codes thrown) that is matched with the rpm even at idle. This just started yesterday and i have had what i believe is a very small coolant leak that I have yet to diagnose...I have checked:
- o2 sensors
- MAF
- Fuel Filter
- Air Filter
- Oil pump (oil getting to the top of the heads)
- Plugs
One thing i have yet to try is fuel pressure bc I dont have a gauge, but I will get one soon.
Anyone have any ideas? Thanks in advance!
Problem is, the car, when cranked up, sounds like there is severe scraping/knocking (no codes thrown) that is matched with the rpm even at idle. This just started yesterday and i have had what i believe is a very small coolant leak that I have yet to diagnose...I have checked:
- o2 sensors
- MAF
- Fuel Filter
- Air Filter
- Oil pump (oil getting to the top of the heads)
- Plugs
One thing i have yet to try is fuel pressure bc I dont have a gauge, but I will get one soon.
Anyone have any ideas? Thanks in advance!
did you check the rocker arms? make sure none are loose. maybe take a short video to and post it up to see if the noise is coming from the top end. maybe also check the flywheel torque converter/ or clutch bolts are all tight.
did you just look at the rockers or did you try to feel them by hand to make sure none cam lose of the needle bearings didn't go bad.
its going to be hard to help you pinpoint this without hearing the noise clearly.
its going to be hard to help you pinpoint this without hearing the noise clearly.
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Verdad Gallardo Thread Starter
Teching In
Joined: Nov 2007
Posts: 48
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http://www.youtube.com/watch?v=X6yiJL1ztdk
wfs
That is the car running. Please listen to the crazy sound. I really think its a vacuum leak.
wfs
That is the car running. Please listen to the crazy sound. I really think its a vacuum leak.
FormerVendor
Joined: Jun 2008
Posts: 56
Likes: 0
From: Baltimore
listened again, I would put money on a collapsed lifter. Great opportunity to upgrade the valve train and install a new lifter set. Just my 2 cents.
X2. If the wheel is siezing up it will have a screaching noise that is fairly continuious. check it out before you cause more damage