primalurges

if you had a few bad followers and adjusters shop should have really replaced them all while they we're in there as most of your cost is labor. The filter is sometimes the cause of the start up rattle but once you're approaching 100k it's more than like the seals on the tensioners.

Primo

You know I have been hearing this for a long time about the anti-drainback valve (or lack thereof) causing the tensioners to loose pressure and slacken the chain, but then I wonder why when I change my oil and pull the filter and let it set for an hour I have never had rattle on start up? The last tensioner I had fail didn't even have a blown seal. I was just weak like something internal let go. Just some thoughts after having done this damn job twice!

primalurges

yeah the while drain down theory is off at best. Sometimes my truck will sit for a week and story up quietly while other times it will sit for a couple of hours and rattle on start up. The only other oil component that may be responsible is the oil pump. I don't know just freakin weird engine.

lewissa81

The anti - drain back valve (I'm calling it ADBV) decreases cold start damage. It's not a cure, but it helps a lot. The damage can happen anyway over time, and some parts can just be defective. Once the damage is done though, the only way to reverse it is to replace it.
Personally I don't think the lack of an ADBV causes the seals to blow. Those seals are just too weak in my opinion and give out when they want to. The ADBV keeps oil in the head so all of the parts up there have a better chance of surviving cold starts.

Area51Werks

The tensioners were changed along with the guides and several other parts. The cam and followers (only on the bad lobes) were changed.


The oil filter did not cure the start up knock or rattle. I had the shop swap out the filter they installed and use a Motorcraft filter I picked up from the stealer. I agree all the followers should have been changed. Hind sight is always 20/20.

Mossy

I tackled this job with a buddy of mine last weekend and low and behold it fixed the dieseling. I had a loose chain which I assume was from the seal of the tensioner. Either way I replaced all the parts and was crossing my fingers when turning the key so I was obviously pretty happy that it worked out. Also a big thanks to lewissa81 for some quick replies when I ran into some road blocks.
Now, onto my passenger manifold gasket..........

Pmoon

I dont have a constant deisel sound, it happens when the engine is warm and I come to a stop after running at low rpms, then it really sounds like crap! It doesnt have a lot of power at low rpm either, warm or cold. Does this sound like phasers or something else?

Pmoon

/\ Vct's have been replaced with no effect

Allinkdupp

Phasers, mine was the same way

Skeet025

Hi I have a 2010 f150 and am getting a ticking noise on acceleration. I called the ford service dept. they said it was probably my cam phasers. They quoted me $3,800.. Is this what it costs or are the ripping me off??