Opinions On Bearings
#1
Racer
Thread Starter
Opinions On Bearings
I pulled the stock L48 from my 77 this winter for a top end refresh, reseal, and paint. The main bearings looked OK, but I'm not sure about the front cam bearings. Any opinions from our experts?
#2
Le Mans Master
That looks damaged from somebody removing/installing a camshaft without proper support. There is a tool for this job which helps prevent this damage but the tool has to be used with some common sense as well. You can also purchase 3 long (carriage) bolts for the task... which is what I do. Personally, I would replace them- that gouging is pretty nasty. IMOP
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ted13b (03-25-2018)
#3
Dr. Detroit
Member Since: Mar 2012
Location: New Braunfels Texas
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I would replace them.
Jebby
Jebby
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ted13b (03-25-2018)
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ted13b (03-25-2018)
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ted13b (03-25-2018)
#6
Team Owner
Yep. Damaged from a "greenhorn" installer...
You need to measure the inner diameter of that bearing so that you can verify the new one is the correct size when installed. Also check the other bearings to verify that same kind of damage is NOT present on them. Some minor nicks may be OK; that amount of damage is not.
You need to measure the inner diameter of that bearing so that you can verify the new one is the correct size when installed. Also check the other bearings to verify that same kind of damage is NOT present on them. Some minor nicks may be OK; that amount of damage is not.
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ted13b (03-25-2018)
#7
Dr. Detroit
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Word of advice....cam bearings go in with a specific order.....this order is usually print on the box flap when you open it. BUT.....make sure somebody did not mixed up the bearing in the box. Look closely at the number on each bearing before you install.
I use the tool in the picture. Light taps are the order.....do not hit it too hard and make sure to check for burrs before tapping the cam bearings in.
Jebby
I use the tool in the picture. Light taps are the order.....do not hit it too hard and make sure to check for burrs before tapping the cam bearings in.
Jebby
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ted13b (03-30-2018)
#8
Racer
Thread Starter
Thanks guys, I may send this one to the machine shop to do.
#9
Le Mans Master
Good plan. I'd also have them pull the oil galley plugs and run the block thru their hot tank. Scrub all the oil galleys with brushes and replace all the freeze plugs. It's out and the added expense will be minimal.
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ted13b (03-30-2018)
#10
Drifting
Smart decision, IMHO.
From my limited experience, worn or damaged cam bearings are #1 culprit of low oil pressure.
And 9 out of 10 of those will get a new oil pump and the owner will be surprised that it didn't help with oil pressure.
From my limited experience, worn or damaged cam bearings are #1 culprit of low oil pressure.
And 9 out of 10 of those will get a new oil pump and the owner will be surprised that it didn't help with oil pressure.
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ted13b (03-30-2018)
#11
Dr. Detroit
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Jebby
Last edited by Jebbysan; 03-26-2018 at 09:17 AM.
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ted13b (03-30-2018)