loud tappet type ticking in Duratec 2.0 dohc 2005 - Ford Focus Forum, Ford Focus ST Forum
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Old 11-19-2012, 03:36 PM   #1
ronj100
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loud tappet type ticking in Duratec 2.0 dohc 2005

My 2005 ZX4 Duratec 2.0 DOHC just started making a loud lifter type noise. Engine has 98k on it with regular oil changes.
Increases and decreases with the engine speed. I can hear it best as the rpm's drop when I rev the car in nuetral. It is also loud at stop lights. It almost disappears under accleration or at steady freeway speeds.
Also, in a similar fashion, when i'm driving in gear and take my foot off the gas to declerate, it gets loud.

My mechanic checked the oil, oil pump, and took off the oil pan to clean the oil sump screen.
He also removed the cams to check everything. He said everything looked tight and clean. However, while he has much experience with the Zetec, this was his first adventure into a Duratec engine. I am trying to get advice before I have a new head put on ($$).

Could this be injector noise?
Without actually replacing each injector, how could one determine that the loud ticking noise is from an injector rather than a bad bucket lifter, etc?

The mechanic was also wondering if the DAMB type lifters could be shimmed if they were out of spec.

Its a loud enough engine ticking that I do not want to just live with it. I want to fix it.



Last edited by ronj100; 11-20-2012 at 08:15 AM.
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Old 11-19-2012, 04:41 PM   #2
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This noise you say you're hearing is your IMRC flaps in the ports of your intake manifold. This can easily mistaken for valvtrain noise and is a common problem with the duratec 2.0/2.3's...my car did the same thing as well. The flaps get sloppy in the ports of the plastic manifold and make a tapping/fluttering noise when they are closed at idle. Then tend to go away when revving the car or driving. Ford does not offer replacement flaps by themselves, you have to buy the whole intake manifold (about $250 if I recall). And unfortunately, the manifold you buy will eventually have the same problem years down the road since they are made from plastic!
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Old 11-19-2012, 04:57 PM   #3
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Are you familiar with the mechanic's stethoscope or screwdriver trick? Use that on the valve cover to help give you some peace of mind. If it's the "tumble flaps", then you won't hear anything in the valve cover. Yes, it will take another intake manifold to fix it- unfortunately. I purchased a used one for mine. You can remove the tumble flaps, but be prepared to suffer low end torque loss as a result. The same goes for aftermarket manifolds, and cams are too expensive to help alleviate the issue of low end torque loss.
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Old 11-19-2012, 05:03 PM   #4
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OH, btw, mine has been clacking for about 50k miles, and I'm at 150k.
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Old 11-19-2012, 05:11 PM   #5
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Buying a used manifold might be a ok option if you are lucky enough to get it from a super low mileage car or if you plan on selling the car soon. Otherwise it is a gamble since you don't really know how worn it is....could last 6 months, or a year or so if you drive the car a lot and you plan on keeping the car for a while, buying a new manifold makes more sense since you know its brand new and should at least last for a couple years. Whynotthinkwhynot is right about the stethoscope thing, I forgot to mention thats how I found this issue with my car....put the stethoscope on your intake manifold right about where the port is... you will definitely be able to hear it over anything else..
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