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Old 09-16-2018, 12:23 PM   #1
Johnnyboiranger22
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Default Need help! clyinder head

So diagnosing my oil pressure concern i decided to just yank the whole motor and i found this wrong with the cylinder head which i bought re manufactured. If my mind serves me correctly these are cam bearings, would that cause my oil pressure issue and metal scraping noises when first started?
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Old 09-17-2018, 11:09 AM   #2
tomw
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Release the cam followers, and pull the camshaft out of the head. Then you can see the cam bearing surface, the cam itself to know the actual condition. If the bearing inserts are scored and damaged, you can leak a lot of oil through the created excessive clearance, reducing pressure within the whole system. A lot of the oil will flow through the easiest exit, and the other bits get less than normal.
What your pictures is possible cam bearing damage. Cannot tell w/o removing the cam.

Lack of lubricant in the pan decreases pump output, and the passage to the cam bearings is sort of roundabout. The oil flows up from the block, across a narrow passage on the bottom of the cylinder head, around a head bolt(peripheral flow) into a passage in the head that leads to a gallery that feeds the cam bearings and the lifter supports.
If you look at the bottom of the head, near the edge, drivers side rearward area you'll see the small volume that connects to a cylinder head bolt hole. That's how oil gets to the cam bearings & lifters.
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Old 09-25-2018, 10:27 AM   #3
Johnnyboiranger22
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Quote:
Originally Posted by tomw View Post
Release the cam followers, and pull the camshaft out of the head. Then you can see the cam bearing surface, the cam itself to know the actual condition. If the bearing inserts are scored and damaged, you can leak a lot of oil through the created excessive clearance, reducing pressure within the whole system. A lot of the oil will flow through the easiest exit, and the other bits get less than normal.
What your pictures is possible cam bearing damage. Cannot tell w/o removing the cam.

Lack of lubricant in the pan decreases pump output, and the passage to the cam bearings is sort of roundabout. The oil flows up from the block, across a narrow passage on the bottom of the cylinder head, around a head bolt(peripheral flow) into a passage in the head that leads to a gallery that feeds the cam bearings and the lifter supports.
If you look at the bottom of the head, near the edge, drivers side rearward area you'll see the small volume that connects to a cylinder head bolt hole. That's how oil gets to the cam bearings & lifters.
tom
Hey Tom! thanks for the explanation ended up being a defective cylinder head have to send it back unfortunately, seller wasn't happy but neither was I, bath and forth that i damage it however i never drove the truck lol. That was the metal noise i was hearing was the oil pump or rod bearings to begine with however truck is tore apart might as well do rod bearings to lol.
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