ls4 rebuild
Thread Starter
On The Tree
Joined: Aug 2007
Posts: 130
Likes: 0
From: Austin Tx.
ls4 rebuild Alright short story for yall
The motor has bent valves due to "over revving" is what the dealership is calling it. 5 of 8 cyls have bent valves cyl8 being the worst of them just bent all to hell. I'm just gonna flat out say was valve float goin above 5600RPM valve made contact with cyl head and badabing bent valve. no idea but thats gonna be my guess, they don't want to warranty the car for aggressive driving/driver abuse and repairs are gonna cost 2300+. As far as I'm concerned ok whatever about the warranty but 2300 to have new valves seated...they can blow me lol. Alright need to know if ya'll can help me with a few thing done a few searches but couldn't find part sources for valves.
The way I'm looking at it the minimum parts I'm going to replace will be
valves
valve springs(something that will prevent this aside form me not red lining the car...6200 rpm area would be nice)
rockers
pushrods
possible port&polish of heads
HP tuners
also never did get around to it but nows a good time for the cross drilled/slotted rotors and performance pads(prob just do the R1 concepts here)
Want to try and order everything from one place if possible but if certain people have better parts than other I can order form wherever. Just need to know a list of vendors for those parts and possible other parts I may consider while rebuilding the valvetrain. If the motor does have to get yanked do to piston damage......well then thats a whole new story as to whats gonna get done but I'll worry about that later.
Thanks in advance
The motor has bent valves due to "over revving" is what the dealership is calling it. 5 of 8 cyls have bent valves cyl8 being the worst of them just bent all to hell. I'm just gonna flat out say was valve float goin above 5600RPM valve made contact with cyl head and badabing bent valve. no idea but thats gonna be my guess, they don't want to warranty the car for aggressive driving/driver abuse and repairs are gonna cost 2300+. As far as I'm concerned ok whatever about the warranty but 2300 to have new valves seated...they can blow me lol. Alright need to know if ya'll can help me with a few thing done a few searches but couldn't find part sources for valves.
The way I'm looking at it the minimum parts I'm going to replace will be
valves
valve springs(something that will prevent this aside form me not red lining the car...6200 rpm area would be nice)
rockers
pushrods
possible port&polish of heads
HP tuners
also never did get around to it but nows a good time for the cross drilled/slotted rotors and performance pads(prob just do the R1 concepts here)
Want to try and order everything from one place if possible but if certain people have better parts than other I can order form wherever. Just need to know a list of vendors for those parts and possible other parts I may consider while rebuilding the valvetrain. If the motor does have to get yanked do to piston damage......well then thats a whole new story as to whats gonna get done but I'll worry about that later.
Thanks in advance
Launching!
Joined: Jun 2008
Posts: 210
Likes: 0
From: Oak Creek, WI
I agree, go to a different dealer, or go back to the dealer and ask how can I over rev my engine that has a rev limiter programed by GM??!??!?! Now I should ask if you have been tuned and raised the shift points or rev limiter?? If not then you could not have over revved the engine.
Thread Starter
On The Tree
Joined: Aug 2007
Posts: 130
Likes: 0
From: Austin Tx.
no tunes or anything but I seriously care less....mind you it's been in for 2 transmissions already(17.5K on the od) while the first 2 due to my engine braking(worn out manual bands) when they rebuilt the 2nd one they rebuilt it wrong and tranny blew up in 1 week. I look at it this way I've had a itch in my pants to get the valvetrain worked on for a while now just never did because of fear of warranty blah blah...well now it's time to have some fun and say to hell with the warranty.
mods to the car are the K&N CAI and 3" cat back exhaust with res delete
mods to the car are the K&N CAI and 3" cat back exhaust with res delete
Last edited by mixerda; Jul 22, 2008 at 08:30 PM.
Thread Starter
On The Tree
Joined: Aug 2007
Posts: 130
Likes: 0
From: Austin Tx.
not even worried about warranty anymore...
just looking for the parts needed now seem that all the kits either come with rockers with pushrods or rockers with springs but nothing that has rockers/pushrods/springs wtf...
just looking for the parts needed now seem that all the kits either come with rockers with pushrods or rockers with springs but nothing that has rockers/pushrods/springs wtf...
Thread Starter
On The Tree
Joined: Aug 2007
Posts: 130
Likes: 0
From: Austin Tx.
alright here my parts list so far
HS 1.8:1 8mm pedestal mount rockers
P/N SLS18
or maybe the
crane 1.8:1 rockers
P/N 144759A-16
http://store.summitracing.com/partde...6&autoview=sku
for springs and rods doing this kit from Crane cams
P/N 54100
http://store.summitracing.com/partde...0&autoview=sku
Exhaust manifold gasket
Fel-Pro P/N MS-92467
HP Tuners VCM Suite
Head Gasket- seems liek has to come from dealer couldn't find a onlien source
Intake valves - factory direct through Advance Auto 9.97 each
Exhaust valves - factory direct through Advance Auto 15.77 each
if anyone has sources for the valves and head gasket lemme know will prob order everything tonight or on Monday, also anything missing that I should order as well?
HS 1.8:1 8mm pedestal mount rockers
P/N SLS18
or maybe the
crane 1.8:1 rockers
P/N 144759A-16
http://store.summitracing.com/partde...6&autoview=sku
for springs and rods doing this kit from Crane cams
P/N 54100
http://store.summitracing.com/partde...0&autoview=sku
Exhaust manifold gasket
Fel-Pro P/N MS-92467
HP Tuners VCM Suite
Head Gasket- seems liek has to come from dealer couldn't find a onlien source
Intake valves - factory direct through Advance Auto 9.97 each
Exhaust valves - factory direct through Advance Auto 15.77 each
if anyone has sources for the valves and head gasket lemme know will prob order everything tonight or on Monday, also anything missing that I should order as well?
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