Page 1 of 1
which camshaft bearing ?
Posted: Fri Jul 14, 2017 6:05 pm
by tonio7#
Hi, which camshaft bearing put on a serpentine 3.9 ?
mine old are groove on the first, and the new not
the diffenrence beetween 2 ref
somebody say the best and why ?
the groove on the first , just for lubrification the timing chain ?
and if not groove, the result
sorry french guy, and not perfect english
Posted: Fri Jul 14, 2017 6:54 pm
by DEVONMAN
The original Buick engine and early Rover engines did not have grooves in the front camshaft bearing and didn't have problems. Bearing made in the USA tend to be not grooved.
The grooves are considered to give better oil feed to the distributor drive via the keyway in the camshaft gear but I have used non grooved bearings without a problem. The grooves may have been added to later engines to help lubricate the thrust plate which is fitted to serp engines.
The timing chain also get some oil from the front of crank main bearing no 1.
Posted: Sat Jul 15, 2017 7:16 am
by tonio7#
ok, so if i have the 2 model , with and without, who is better ?
my block is a 3.9 serpentine with the plate on the camshaft , thanks
Posted: Sun Jul 16, 2017 7:05 pm
by DEVONMAN
tonio7# wrote:ok, so if i have the 2 model , with and without, who is better ?
my block is a 3.9 serpentine with the plate on the camshaft , thanks
I'd go for the grooved type.