Idle speed vs cam phasers?
#1
Idle speed vs cam phasers?
So perhaps I'm thinking too much into this but if low oil psi at idle is what creates phaser rattle wouldn't raising the idle speed fix the issue as well? If I raise the rpm by 200 rpm my noise disappears because of the increased oil psi. If you have a tune would this be a viable option as opposed to replacing the oil pump?
I'm have a lock out kit and tune for the truck but was curious about this.
I'm have a lock out kit and tune for the truck but was curious about this.
#5
Originally Posted by random155
5w30 works all year long in NJ
#6
@varoom varoom
Might help for a short while. BUT -I think you are failing to see the forest because of all those damn trees obscuring your view. This may even explain the plan to use lockouts.
A huge percentage of phaser jobs are done primarily to address the noise (which the lockouts will definitely stop).
However - also - 99 percent of phaser jobs include replacing chains AND tensioners ALSO - (which lockouts have no affect on fixing or preventing their repeated failure).
The chains on the 5.4 are VERY LONG, and in 175 to 200 thousand miles, they wear (stretch) to the point the tensioners can no longer absorb the slack. That is not a failure. It's normal wear and tear and not unreasonable service life on any vehicle equipped with steel timing chains. Especially 122 link long chains, so two or three 'thousandths' wear - on each end of each link winds up being multiplied several times (250, 300, 400 thousandths). That extra length (on the pulling side of the chain, - Tensioner Arms are on the trailing side of the chains) - has the _effect_ of 'retarding' cams by a few degrees. That effects aspiration AND power. And that effect would be present even if the engine were originally equipped with lockouts. When the tensioners can no longer take all the slack out effectively, chains flop around and break plastic guides. That ALSO would not be cured by lockouts.
Bottom line, if new chains, guides, tensioners were installed - in a large portion of the cases the noise would be cured even with original phasers. But for the amount of work they become part of the timing job. If you run 175 - 200 k miles with lockouts, you will be there again anyway - just perhaps noise free until the guides break and chain starts rattling.
Just food for thought.
Might help for a short while. BUT -I think you are failing to see the forest because of all those damn trees obscuring your view. This may even explain the plan to use lockouts.
A huge percentage of phaser jobs are done primarily to address the noise (which the lockouts will definitely stop).
However - also - 99 percent of phaser jobs include replacing chains AND tensioners ALSO - (which lockouts have no affect on fixing or preventing their repeated failure).
The chains on the 5.4 are VERY LONG, and in 175 to 200 thousand miles, they wear (stretch) to the point the tensioners can no longer absorb the slack. That is not a failure. It's normal wear and tear and not unreasonable service life on any vehicle equipped with steel timing chains. Especially 122 link long chains, so two or three 'thousandths' wear - on each end of each link winds up being multiplied several times (250, 300, 400 thousandths). That extra length (on the pulling side of the chain, - Tensioner Arms are on the trailing side of the chains) - has the _effect_ of 'retarding' cams by a few degrees. That effects aspiration AND power. And that effect would be present even if the engine were originally equipped with lockouts. When the tensioners can no longer take all the slack out effectively, chains flop around and break plastic guides. That ALSO would not be cured by lockouts.
Bottom line, if new chains, guides, tensioners were installed - in a large portion of the cases the noise would be cured even with original phasers. But for the amount of work they become part of the timing job. If you run 175 - 200 k miles with lockouts, you will be there again anyway - just perhaps noise free until the guides break and chain starts rattling.
Just food for thought.
#7
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#8
#9
I'd stay with the phasers for all the advantages the bring to the engines operation.