roller rocker problem,need a little help
Thread Starter
Joined: Jan 2006
Posts: 1,489
Likes: 0
From: Flowood,MS
Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
roller rocker problem,need a little help
hey guys ,i hope im in the right spot.i have checked the search and not found this problem so i hope someone can help.i have a 5.7 L-98 with L-t4 production cam,alluminum corvette L-98 heads casting number 113.All of these parts, entire engine included, are brand new and never been run.while im installing my 1.6 roller rockers(cat stainless steel)they appear to be angeled to the side away from each other at the spring side.the man thats helping me build the motor says he has seen it before but he doesnt like it.its almost like the giudeplates slot where the pushrod comes through is pushing it to the side a little.I am useing hardened push rods.I have a lot of time and money,well a lot of money for my budget,invested and i dont want to screw anything up.Any suggestions?thanks........I cant wait to get this sucker on the street again.Im putting my old 305 TPI in my 89 chevy 4x4
Last edited by Shadygrady; Apr 25, 2006 at 08:32 PM.
Joined: Sep 2005
Posts: 27,949
Likes: 2,461
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
That is normal. It's what they always look like.
The things that determine how the rockers sit, are the spacing of the rocker studs which is dependent on the castings and the holes drilled in them; and the spacing of the slots in the guide plates. Guide plates are a relatively precision item, but castings are not. Therefore, if ANYTHING is out of whack, odds are it's the heads themselves.
The things that determine how the rockers sit, are the spacing of the rocker studs which is dependent on the castings and the holes drilled in them; and the spacing of the slots in the guide plates. Guide plates are a relatively precision item, but castings are not. Therefore, if ANYTHING is out of whack, odds are it's the heads themselves.
Thread Starter
Joined: Jan 2006
Posts: 1,489
Likes: 0
From: Flowood,MS
Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
these are brand new heads.is ther some kinda washer i could put under the stud,or have the heads machined for proper alignment
Joined: Sep 2005
Posts: 27,949
Likes: 2,461
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
"Proper alignment" is actually a pretty wide range.
If they all look about the same, they're OK.
Sometimes, people have had to cut & re-weld guide plates, in really extreme cases; but that's fairly rare.
Post a pic, and maybe some of those among us who have seen LOTS of motors, can maybe judge whether your situation is unusual or not.
If they all look about the same, they're OK.
Sometimes, people have had to cut & re-weld guide plates, in really extreme cases; but that's fairly rare.
Post a pic, and maybe some of those among us who have seen LOTS of motors, can maybe judge whether your situation is unusual or not.
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