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Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 9436
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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Have put a new camshaft in a 6bt 5.9 lt. After running

Customer Question

Have put a new camshaft in a 6bt 5.9 lt. After running engine there appears to be almost no oil comming out of oil holes in the rockers. Is this normal or could this be the reason why the camshaft failed. When we pulled it out the lobes where nearly all worn off.
What is the oil path to to get the oil up to the rockers. Do you have any suggestions.
Cheers Greg
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 1 year ago.

Hi I'm Wayne

I will help you with this

I have rebuilt engines for 34+ years.

what you have is failed cam bearings

the holes being blocked from oil passage

they spun in there

sorry to say need to pull the Cam , and replace the bearings

I hope this helped you

Hi if this helped you

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Customer: replied 1 year ago.
These engines only have 1 bearing at the front the rest are machined in the block.
When we put the new cam in there was no wear on the bearing surface at all only cam lobes worn.
How does this stop the oil getting up to rockers?
Expert:  Wayne replied 1 year ago.

Thank you for that

the oil is directed from Cam oil galley to the rockers

That is why I said the Cam Bearing

only thing to wear the lobes , is lack of oil, which you know

something is not correct in the cam bearing or the the machined block , is worn

I hope this helped you

Expert:  Wayne replied 1 year ago.


Just following up with you

did my answer help you

let me know ,Please

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