I thought you guys said that all engines 87 and up had roller rockers? Well I dont have roller rockers......So what gives? Not he engine hasnt been changed and yes its the original engines.

No what cam do I get? What kind of rockers are these?

thanks

 

close up

 

gm doesnt use roller rockers on factory engines, they use roller
cams.
the ls1 engines use rollet trunion rockers, thats it on roller valve
trains..
airdeano

 

They use roller lifters (of course roller cams to go with the roller lifters).

 

So do I have a roller set up or what? When I look into getting a cam, so I look at the roller cam or hydrolic cams?

OK, no roller rocker but roller lifter is what I got? HUH?

Is the lifter under the spring? Ive never removed any futher than my cover. Can some one explain whats where? Weres the seals that cause smoke at start-up?

 

the lifters are under the pushrods, on top of the cam lobes. They 'lift' the push rods. In order to get to the lifter's you would have to take the manifold off. 87's have a hydraulic roller cam with hydraulic roller lifters. I prolly spelt hydraulic wrong but w/e.

So when you buy a cam look for hydraulic roller ones, unless you want to change back to flat tappet lifters.

 

roller rockers are not stock on any roller camed engine. hydr. roller cams talk about the actual cam profile a how the lifter works. Not that there are little rollers in the rockers themselves. You do have a roller block, you just need to buy a set of roller rockers. I sugest the Pro Mags from Crane... they look the strongest and will last longer then the aluminum ones.

 

Of course not in OUR cars, but the LT4 in Corvettes came with aluminum rollerized rocker arms. Too bad they were aluminum. At least the GM Powertrain guys were smart enough to demand that Crane reinforce teh weak areas of their Gold Race rockers before installing them on a Chevy engine. Even they realized their weak design traits.

BTW - Pro Magnums are from Comp Cams, not Crane. Probably the strongest stud-mounted rocker you can get is the forged stainless Comp "Hi-Tech" rocker. Pro Magnums are a close second.

 

Ahh vader.. as soon as i got in my car after i replied i was like.... chit there comp.. not crane... hehehe... Whats teh tag on the "hi-tech" rockers? mmmmm... forged stainless steal... mmmmmm look pro mags look like ther built like a brick chit house.. and the lt4, well.... its an lt4... between fbods and vettes, there is like 100 out there hehehe