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#1
03-05-2010, 07:07 PM
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Need help diagnosing a valvetrain noise??
Well not too sure but I think ive got a bad lifter. If not then a rod knock or something. It does vary with rpm. See the video below. Dont mind the squeeking belt, lol
http://www.youtube.com/watch?v=x-B4f3251PA
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2000 SS Th350, FTI 4200 stall , cam, full bolt-ons, 150 wetshot, Moser 9inch/locker/4.11s, Slowhawk tuned. 493rwhp 570rwtq. 10.97 @ 127.7 1.58 60' and M6 10.84 @ 126.3 1.55 60' Th350 SOLD BUT NOT FORGOTTEN New Toy - 06 Torrid Red Gto M6. 231/242 cam, Kooks, magnaflow, GForce, Monster stg2, lingenfelter cai, 411rwhp 385rwtq. 12.40@111 
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#2
03-05-2010, 11:09 PM
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if I had to guess I would say a rocker shit itself and which is common on these cars and has happen to me but not that bad. other then that it maybe in the lower end I would pull the valve covers and check the rockers for damage mine spilt the needle bearings into the pan that is how I found mine.
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 2000 SS Procharger 98 Z vert turbo 07 TB SS cai catback and tune
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#4
03-05-2010, 11:13 PM
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I Concur.
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 1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore.  BAAAAAA!!!!!!
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#5
03-05-2010, 11:39 PM
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Well looks like thats what I will do. And how will I know if the needle bearing is there? I have never had the valve covers off myself. I think the last time they were off was when Don did the cam...
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2000 SS Th350, FTI 4200 stall , cam, full bolt-ons, 150 wetshot, Moser 9inch/locker/4.11s, Slowhawk tuned. 493rwhp 570rwtq. 10.97 @ 127.7 1.58 60' and M6 10.84 @ 126.3 1.55 60' Th350 SOLD BUT NOT FORGOTTEN New Toy - 06 Torrid Red Gto M6. 231/242 cam, Kooks, magnaflow, GForce, Monster stg2, lingenfelter cai, 411rwhp 385rwtq. 12.40@111
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#6
03-06-2010, 12:10 AM
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look at them... they are easy and just touque down very simple unlike all the other gen motors. I believe they are 21ft lbs. I think they are like 15 bucks a piece at the dealer for a rocker. remember to look at both sides of them not just the side you can see easily.
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2000 SS Procharger 98 Z vert turbo 07 TB SS cai catback and tune
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#7
03-06-2010, 12:22 AM
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Update. I just pulled the valve cover off. The rockers seem to be fine and secured properly. I am thinking its a lifter thats collapsed.
The car starts fine and doesnt seem to have lossed any power or anything like that. I dont know though...
__________________
2000 SS Th350, FTI 4200 stall , cam, full bolt-ons, 150 wetshot, Moser 9inch/locker/4.11s, Slowhawk tuned. 493rwhp 570rwtq. 10.97 @ 127.7 1.58 60' and M6 10.84 @ 126.3 1.55 60' Th350 SOLD BUT NOT FORGOTTEN New Toy - 06 Torrid Red Gto M6. 231/242 cam, Kooks, magnaflow, GForce, Monster stg2, lingenfelter cai, 411rwhp 385rwtq. 12.40@111
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#8
03-06-2010, 12:25 AM
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if it were me. id pull everyone off. each lifter and inspect them. your gunna have to if you do lifters either way. HOPE its not lifters!!!! take em. if there good there simple to reinstall. there just a bolt down. no adjustments just torque em right
__________________
1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. BAAAAAA!!!!!!
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#9
03-06-2010, 10:46 PM
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UPDATE!!! Started pulling off the intake and getting the heads ready to come off today. I pulled off the mid pipe and a decent amount of water/coolant came out. NOT GOOD!! Looks like I blew a head gasket. Tomarrow I am going to drain the oil and use a magnet to see if Ive got metal shavings in the oil. Its not looking to good though. Time for a new shortblock and a new set of heads. Looks like the car will be down most of the summer or till god knows when.
__________________
2000 SS Th350, FTI 4200 stall , cam, full bolt-ons, 150 wetshot, Moser 9inch/locker/4.11s, Slowhawk tuned. 493rwhp 570rwtq. 10.97 @ 127.7 1.58 60' and M6 10.84 @ 126.3 1.55 60' Th350 SOLD BUT NOT FORGOTTEN New Toy - 06 Torrid Red Gto M6. 231/242 cam, Kooks, magnaflow, GForce, Monster stg2, lingenfelter cai, 411rwhp 385rwtq. 12.40@111
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