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Author Topic:   cam bearings
new8
Dirt Full Roller

Total posts: 42
posted May 22, 2002 07:39 PM
i would like to know the correct way to push out cam bearings, and when i reinstall them the correct way to line them up to the oil holes.
all the info is appericated.

dryslick racer
Dirt Roller

Total posts: 8
posted May 22, 2002 09:05 PM
You need a cam bearing tool to knock the cam bearings out. You can rent one at your local auto parts store probably.We put ours in at the 5 o'clock position {looking at the front of the block}.The block has a full groove so the hole in the bearing does not have to be lined up with the hole in the block.This might be better left to your local machine shop as they have a lot more experience with the cam bearing driver.

YAZ
Dirt Forum Racer

Total posts: 77
posted May 23, 2002 11:14 PM
I BOUGHT A TOOL FROM SPEEDWAY, I THINK
IT WAS AROUND $35.00. THE COST TO HAVE
A SHOP PUT THEM IN. I USED IT THREE
TIMES ALREADY IN A YEAR, SAVE SOME MONEY
IN THE LONG RUN.

THE BOX THE BEARINGS COME IN SHOULD BE
MARKED AS TO WITCH BEARINGS GO WERE.
MAKE SHURE THE #1 BEARING GOES IN THE
FRONT. I ALWAYS LINE THE HOLES UP WHEN
POSSIBLE. I DONT KNOW IF THEY HAVE TO BE
OR NOT, BUT I LIKE TO BE SAFE.



awkwardjeff
Dirt Freak

Total posts: 458
posted May 24, 2002 03:53 AM
a few things to remember when installing cam bearings........put the front one in last, the 2nd one back is the same as the rear....the number 3 and 4 bearings are the same........as is the number 2 and 5 (rear), this leave the front being the number one...


if you put them in the wrong holes you are in big, BIG trouble.........they are different sizes..........

don't knock them in too far, but make sure you go far enough to line up the oil groove with the whole in the bearing........I use a coat hanger with a small bend in the end and poke it threw the hole in the bearing to make DARN SURE I got it lined up.

I NEVER put the bearings while the hole facing down, as the timing chain spins the cam it has a pulling effect......pulling down on top the hole. This may starve the bearing for oil when pressure is low....I like to put the bearings in at the 4 oclock position to let the cam pull oil under.... everyone seems to have a little different IDEA on which way is best.........

And if after installing the cam bearing you can't fit a cam into the block knock the bearings around ..........I once bought a block that was all machined for $100 because the guy couldn't get a cam into it.....I knocked the cam bearings around and lined them up properly and bolted in my stuff....
it's hard the first few times you install them to keep them all straight in line with each other.........after a while it seems easy.

Monster
Dirt Maniac

Total posts: 135
posted May 24, 2002 10:22 AM
Here's a trick to help keep them in line, if you have a driver with a cone centering device: Install the 4 rear bearings from the front of the engine, then install the front bearing from the rear of the engine. Now, use a liteweight oil(like AW-32 hydraulic jack oil), oil the cam up, put it in, and make sure it spins free. If it doesn't, check it for runout, then recheck your bearing installation. A cam bearing driver should be one of the first tools an engine guy buys, 'cause you can't get a block clean with the cam bearings in, and trusting the machine shop to get it clean enough is ... well, they can sure do it fast!

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