Pump is not timed to the engine.
Fuel injection pump belt change
Hello, I have inherited a 2011 3.0 V6 TDI Touareg with 130k. The fuel injection pump belt, roller, and tensioner are in poor condition. Is it necessary to lock the injection pump cog when changing this belt? I've read that this pump is timed to the engine. If I absolutely need special tools I can pick them up, but if a paint mark works fine I'd rather do that.
Any help is appreciated!
Any help is appreciated!
1 - 13 of 46 Posts
Correct. Common rail pumps aren't timed, all they do is create the high pressures. The ecu controls the timing by telling the injector when to open.
Significant damage?Well, if it were mine, I'd treat it just like a timing belt. It is essentially the equivalent of one, and if it goes to crap, it does significant damage. Remember that belt degrade, and over down under you probably have lots of heat and stuff so you may want to bite the bullet and do it as PM instead of waiting for the big bang.
Just curious what damage there would be? It would simply stop running.Guess not. Just wait till it lets go and simply replace it.
Not saying I wouldn't replace it, just that it isn't going to cause catastrophic damage, and it is a lot harder than on an old V6, as it's on the back of the engine.
There is nothing to get tangled. You guys have them over there in boats 😉. Generally when a toothed belt like a timing belt fails, the teeth are ripped off the belt, the belt doesn't flail around wildly like a failing ribbed belt can, there is also a guard over the whole lot. You normally.enjoy a good argument 😔
You can't see the wear on a toothed belt, they are working one minute, have no teeth the next minute.I would like to see some actual data on wear from a used belt vs. a new one.
There are a couple 3.0 TDI's in Canada that have gone over 500,000 kms and afaik, they never changed that belt.
Obviously different environments and usage can affect something like this.
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That's not how toothed belts work. Cracks or not on the outside tell you diddly squat about what's happening on the inside of the belt, or whether the teeth are about to fall off.You could put a caliper on a new belt and measure the difference on the worn belt, if didn’t loose its teeth. Not sure if they make a gauge for measuring. Gates makes a gauge for their serpentine belts.
Not to mention they can develop cracks before they break....well if they are EPDM this is not the case.
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You don't need to make marks or count teeth, the high pressure fuel pump is not timed.Replaced, make marks and count teeth.. Make sure you adjust the tension on the tensioner correctly..
With nearly 200k on the original it was time to have some more piece of mind.
Make sure you do the hardware pullies and all.
No sense in being cheap over parts that have gone 12yr and 200k miles in my opinion.
Unfortunately for anyone who thinks they are timed, they are incorrect.That's debatable depending whom you ask lol
I'm not suggesting. They are not timed. They have nothing to do with timing, they simply make pressure, the ecu controls when the injectors are fired.I've heard some pretty convincing arguments either way. I wish I remember who it was arguing it.. it was somebody big in the field. I know you can't install a pump 180* out like the old days but I saw pretty convincing engineering discussion that to a point they are indeed timed. Dunno my guy. I'm neutral on this one but can accept that these pumps can basically be installed however
No common rail pump needs to be timed. On anything at all. Ever.Maybe, but its a just a regular old cp4.2 which every big diesel uses, and on every other big diesel they need timed....
Probably a nvh thing for weird American products. You could put it on "incorrectly" and it's still going to run.I'm not saying you're wrong, but there's countless sources that disagree
2011-2014 Post-Warranty Power Stroke Fix Part 2: Turbo & CP4.2 Install
With the right air and fuel added to an early 6.7L Power Stroke you can have a 640hp tow monster!www.drivingline.com
Here's the timing procedure for the eco diesel ram
As above, I'm talking about timing in the traditional sense, they will run no matter how they are installed, it doesn't control the timing of the injection. That is for some nvh reason or similar.
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