Mack312

We have two 2000 454 Mags MPH (385 hp).
Do these have roller rockers?
I searched the board and did not find an answer.

Thanks in advance!

Joe

Elite Marine

That engine should have roller rockers...pull a valve cover and see!

Mack312

NO!
Only 52 hr on them and no leaks.

Mack312

Pantera,
You are correct and thanks.
I found a manual I thought was
200 miles north at Lake Eire with the boat.

Thanks again.

Joe

PS Still not pullin those covers, not until I need to.

blown formula

Actually, you can pull the PCV /vent hose out of the valve cover & see if they are rollers or not..... I believe they are roller rockers, but not roller lifters.

FBRONCO

I have a 95 454 MAG EFI 385hp and it does not have roller rockers. I added them two seasons ago. I thought the later cool fuel models also did not have roller rockers, but they did have hydraulic roller lifters.

rpm

It will have roller lifters, but not roller rockers. They will be stamped non-adjustable from the factory.

Rod

Vinny P

I have a '99 454 magnum. It has stamped steel non-adjustable rockers.

H2Xmark

RPM and Checkmate are right, it has a hyd. roller cam with non adjustable rocker arms, only the 500hp's[and higher] have roller rocker arms, you can add them to that motor with no problem
Mark

mcollinstn

yeah, what those guys said -
factory style hydraulic roller lifters
factory style stamped steel bolt-down rockers (no rollers anywhere).