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Originally Posted by leonb
I have a ticking lifter on my 99 C280. All the lifters was replaced about 10 000km ago. Before the lifters were replaced, it had a constant ticking. After the lifters were replaced, the lifter ticking is intermittent. Usually on a cold start (but not always - about 50% of the times), I'll have the ticking for about 10-20 minutes before it goes away. Sometimes the ticking will come back even if the engin is still warm, for example after I have driven for 200 km and stop - when I start up after 5 minutes it will tick for a few minutes before silencing.
I dont know why it still ticks even when all the lifters where changed. The only thing I can think of is that one of the lifters is not getting oil due to partially blocked oil galleries, etc.
Is it advised to do an engin flush, or put a detergent in the oil, to try and open up oil galleries. Or what should I do?
I afraid of causing more problems if I flush, such as all the varnish/deposits coming loose and block up the whole engin.
The car has been running on Magnatec for whole of its life (160 000km). Apart from the last service before the lifters was changed when it had Mobil 1 in. I think the previous owner tried to use a synthetic to see if it wouldn't solve the problem before changing the lifters. I bought the car on 150 000, with noisy lifter, but under the agreement that he will change the lifters.
What is the possibility that the ticking noise is something else (not a lifter), keeping in mind that it is intermittent and usually is only noisy in the first 10-20 minutes after a start.
Thanks for helping. I really need to solve this, and have asked for advise in a number of forums over the last few months (this one included), without real pratical advise.
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Have you tried
auto-rx? I have used it on 3 cars '95 C280 135K miles, '96 Maxima 127K miles, and a '00 Passat 105k miles. When looking at the cams on my C280 after treatment, all signs of varnish are gone. The C280 filter looked as if the varnish had been transfered to the filter like the testimonial / pics on the auto-rx site of the MB S500 after the cleaning phase. The Maxima filter (which is an extremely small filter) had noticeable thick dark sludge coating the filter after the cleaning phase. I'm still on the rinse phase and will cut the filter open when I'm done with the cleaning phase to see if there is any additional sludge. I didn't notice any sludge on the VW filters and its color looked similar to the C280 but a bit darker after the cleaning phase. I used a roto-zip tool with a metal circular blade to cut the Maxima and VW metal shells from the filters. Although my C280 had no noticeable ticking sound, I do believe the engine runs quieter. It seems that my normal idle is up slightly on the VW (760 ish to 780 ish). And on my Maxima, my overall mpg appears to have increased by almost 1 mpg to about 24.5.