are they all the same size ? i just got mine and they are all marked the same so i am assuming that they are the same. i want to install the bearings and want to make sure first. thanks dave
Oil holes need to be at 3 & 7 with the block straight up, looking from the front. I believe TA is printing that on the box now.
Dave, one other thing....because the bearings are wider than stock, it seems most shops just bang them in until they are centered....this is not neccesarily where you want to be. Once installed, you should be able to look up the holes for the main bearing oiling and see both grooves centered in the hole.....the front one look up the oil passage and make sure its centered along with the oil feed hole... Also, once installed, it doesn't hurt to blast some air through there with a nozzle.....the bearings sometimes get little shavings... later tim
thanks again, two very good pointers to remember, i'm going out to the garage to do it right now. hopefully i can get the short block assembled today.
reason for 3 & 7 ?? cam bearings went in easy. cam turns nice and easy. the question i have is why 3 & 7 for the oil holes? the hole doesn't line up with the hole in the block. the only thing i can think of is to pressurize the grooves in the back of the bearings and feed both holes equally. if someone knows the answer to this i would like to know. thanks, dave
The load on the cam journals is straight down...By having the holes at 3 and 7, the pressurized oil creates a wedge of oil at the load point and prevents(in theory) wiping the cam bearing out... At least that's how it was explained to me...
Jim is correct, and by having the backside of the bearings grooved all around, it allows the oil to flow from the original oil hole (at the 9 oclock position which is basically useless) around the backside to the new holes, which are positioned, as Jim said, to creat a wedge of oil where you need it most... Stock cams never put much load on things, the newer ones do and will wipe out a stock set of bearings real fast (especially #1) with larger springloads. Bearings are harder than stock, and are also wider than stock to help carry the load. Thats all I know. Later Tim
