Quote:
Originally Posted by ChaseBBC
On a bbc I installed a hyd roller comp cam and lifters. It had flat tappet. the kit only came with a cam button. Do I need a cam thrust plate along with the button or will just the button do the job? It already has the holes drilled for the plate so no biggie if I have to use one. Thanks in advance
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You dont use the old flat tappet thrust plate on a roller cam install.
Because all roller cam lobes are ground flat instead of tapered like a hydraulic or solid cam, it is necessary to provide some means of holding the cam back to the rear of the engine. The thrust button rides between the front of the timing gear and the back of the front cover, and can be shimmed for proper end play in the cam. Both solid nylon button and roller thrust bearing styles are available. Wear plates eliminate the wear at the front of the block and are moly coated.
The wear plate is a round thin washer looking piece with an internal hole sized to fit over the cam journal diameter.
I noticed a glaring issue that I feel you should address...
I see from your pic that both front oil gallery plugs are drilled out with a 1/16" drill...really bad news for oil pressure...
Suggest you follow the following:
Remove both oil gallery plugs, and replace the driver side with an un-drilled plug...then
(1)drill a new blank plug for the front pass side lifter gallery oil passage with a .035 drill so it sprays oil on the rear of the timing chain gear and chain
if its a .035-.039 hole it will provide a bit extra lubrication without causing a problem with your oil pressure, just be aware of that drill size, basically a 1/32"-#72 drill, so use a drill press and take your time those bits are easy to break...
If this engine failed due to oil pressure low issues...you just found the reason...
