Clattering / diesel sound at startup and light acceleration
#17
02-21-2012, 10:53 AM
Senior User
#18
02-21-2012, 03:51 PM
My vote is for worn camshaft chain tensioners guides in the front of the motor.
They are tensioned by oil pressure.
If the guide material is nearly gone, the tensiones have a longer travel and lets the chains hit the front covers.
As speed increases the oil pressure goes higher and takes up the slack..
I hope oil heavier than 5W30 was not used over the engine lifetime because heavy oil contributes to the wear from excess pressure just after starting until the oil thins from heat, but it can still happen with any oil used.
Good luck.
They are tensioned by oil pressure.
If the guide material is nearly gone, the tensiones have a longer travel and lets the chains hit the front covers.
As speed increases the oil pressure goes higher and takes up the slack..
I hope oil heavier than 5W30 was not used over the engine lifetime because heavy oil contributes to the wear from excess pressure just after starting until the oil thins from heat, but it can still happen with any oil used.
Good luck.
#20
02-21-2012, 04:06 PM
Senior User
#22
02-21-2012, 04:33 PM
Senior User
#24
02-21-2012, 04:36 PM
If the heavier oil accellerated the wear, changing to the lighter oil may just make the noise worse now.
It's the lighter tension on the chain guides that would have given them their longer life.
There is still a lot of old time thinking about using heavier oils to increase engine life.
That is not where it's at, today. Modern engines are built to tighter tolerences, Ford engine designs are no longer the old push rod types, and oils are greatly improved all for longer life.
If this is ignored for thinking an owner knows better than the mfger, then the consquence comes visiting later on in terms of wear for the original owner or all owners afterwards.
Good luck.
It's the lighter tension on the chain guides that would have given them their longer life.
There is still a lot of old time thinking about using heavier oils to increase engine life.
That is not where it's at, today. Modern engines are built to tighter tolerences, Ford engine designs are no longer the old push rod types, and oils are greatly improved all for longer life.
If this is ignored for thinking an owner knows better than the mfger, then the consquence comes visiting later on in terms of wear for the original owner or all owners afterwards.
Good luck.
#25
02-21-2012, 04:36 PM
Senior User
#26
02-21-2012, 04:37 PM
Senior User
If the heavier oil accellerated the wear, changing to the lighter oil may just make the noise worse now.
It's the lighter tension on the chain guides that would have given them their longer life.
There is still a lot of old time thinking about using heavier oils to increase engine life.
That is not where it's at, today. Modern engines are built to tighter tolerences, Ford engine designs are no longer the old push rod types, and oils are greatly improved all for longer life.
If this is ignored for thinking an owner knows better than the mfger, then the consquence comes visiting later on in terms of wear for the original owner or all owners afterwards.
Good luck.
It's the lighter tension on the chain guides that would have given them their longer life.
There is still a lot of old time thinking about using heavier oils to increase engine life.
That is not where it's at, today. Modern engines are built to tighter tolerences, Ford engine designs are no longer the old push rod types, and oils are greatly improved all for longer life.
If this is ignored for thinking an owner knows better than the mfger, then the consquence comes visiting later on in terms of wear for the original owner or all owners afterwards.
Good luck.
#27
02-21-2012, 05:15 PM
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