Offshoreonly.com - Gen V Cam in Gen VI Engine

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Quote:

Originally Posted by Boat1 (Post 3035127)

It does not have enough clearance for a double roller style chain and a thrust button, it must use the factory single roller style timing chain with retainer plate. There are upgrades to this chain assembly available also. To use the Gen VI cover you need a stepped nose cam, retainer plate, and a block with six bolt holes or be willing to drill and tap additional bolt holes in your Gen V block.

That not true. You can use a double roller with a Gen VI cover. Rollmaster makes a Gen VI double roller chain with billet gears. I use them quite often. If you use a MK IV/ Gen V cam and a Gen VI cover, you have to use a button from a small block because it is shorter. I still usually have to shorten the button some to get the endplay correct.
Eddie

Obviously the easiest thing to do is to use a step nose Gen VI cam with the retainer plate. You can then use the Rollmaster Gen VI double roller set with the stock Gen VI cast aluminum cover.
Eddie

Eddie we posted at the same time, I was trying to explain the differences between Gen V and Gen VI blocks and covers. Thanks for the info on the timing chains, I stand corrected.

No problem buddy. I'm just happy that for once I'm right:lolhit:

I have brand new take out's never ran 454 502 VI gen6 Roller camshaft magnum cam's 100.00 each shipped to your door.let me know thanks.
Details on the cam below
MERCRUISER 454 502 MAGNUM ROLLER

MERCRUISER # 431-850478
.004 300*/ 300*
.006 288*/288*
.050” 224*/224*
.200” 125*/125*
Lift .483”/. 483”
ICL 109*
LSA 115.5*