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| Just Changed The Hydraulic Tappets-got Worse! | |
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| Tweet Topic Started: Sat May 26, 2012 2:59 pm (1,022 Views) | |
| mchell | Sat May 26, 2012 2:59 pm Post #1 |
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HELLO just finished changing the hydro tappets on my 2.6 auto and the engine got a kind of a rocking uneven idling speed!!! I've done everything properly-applied correct torque to the bolts, filled up the tappets with clean oil and even changed the spark plugs to some bosh super 4 (four electrodes) which could be better even, but no..... please help as I don't want the engine to be working like that- it seems it is deregulated on idling but before changing the tappets was much better on this! cheers |
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| Richy190E | Sat May 26, 2012 3:21 pm Post #2 |
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bubble bubble
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Put single electrode plugs back in and wang the super 4's as far as physically possible. The tappets will take a while to settle. |
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| mchell | Sat May 26, 2012 3:27 pm Post #3 |
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why are 4 electrodes are the ones causing the trouble!!!??? I thought it would be better!!!! please explain! |
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| mchell | Sat May 26, 2012 3:52 pm Post #4 |
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yeah-you're right! put the old ones (that still i want to change for new ones anyway) back into it and it works just as before-smooth idling and rev up, because with the spark plugs of 4 electrodes, it wasn't even accelerating properly, almost misfiring..... but still the explanation is important- why the four electrodes are worse? Is it because they need a more powerful coil? cheers ps-I took pictures of the procedures for the hydraulic tappets that could be useful to everyone doing the same job, but it seems that I've been having problem uploading them into a nice thread of the forum. they were taken with the mobile, but due to this great day (lots of sunshine!) they are of great detail and definition. Could someone help on this too!! |
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| Matt | Sat May 26, 2012 3:58 pm Post #5 |
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Administrator - Hawk Eye
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How to post images. |
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| Richy190E | Sat May 26, 2012 5:02 pm Post #6 |
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bubble bubble
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The super 4's only seem to work correctly in modern 16 valve engines with super fine fuel atomisation and strong spark system, our cars glob fuel at them and they dont like it. CR and cylinder shape/valve size and positioning could also affect it. Fact is although listed for our cars they rarely cause an improvement. 1 big spark is better than 4 little ones in this case. |
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| Neil | Sat May 26, 2012 6:00 pm Post #7 |
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Newbie
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Golden rule of old Mercs, iirc
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| iggy | Sat May 26, 2012 7:33 pm Post #8 |
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agreed chuck the super fours in the trash no good for your car |
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| mchell | Sat May 26, 2012 9:28 pm Post #9 |
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ok thanks guys. I waste of money those spark-pugs! anyway, the tappets are done so i hope no more problems from there-no more of that unnerving rattle in the first spinns form the engine from cold! Next big (expensive!) thing will be the injectors- a fairly easier job- and create a kind of tutorial for the tappets replacement for everyone to use it. cheers everyone |
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| Deleted User | Sun May 27, 2012 5:18 am Post #10 |
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Deleted User
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RE: plugs/anything else: I have rarely found an "alleged" "upgrade" that improved these cars. There is always some tiny reason why they are done the way they are, and everytime I try to change something, I learn why it was done the way. It reminds me that THEIR way and THEIR parts were tested for years in development, and any new idea or part is somewhat experimental. |
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| alogaparaloga | Sun May 27, 2012 10:09 am Post #11 |
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crazy mind
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While I agree with Richy, I would like to add that the injection system should work corretly first and the rest of the ignition system should be up to the task. The reason I mention this is that because I have a different experience with the Super 4 plugs on my 1.8 8v. and since I put these plugs in I tried single electrode ones again and then I moved back to super 4. I found super 4 plugs to make my engine more responsive and I also found 10miles better mileage per tankfull. There are many factors that can affect the way an engine operates and I would say that for our cars the reason super 4 may not work depends on coil released charge and dwel time if the coil is tired. Anyways try it and use what is best for your car and your driving style. |
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| mchell | Sun May 27, 2012 10:43 pm Post #12 |
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I've changed yesterday the from the super 4 to to the old sparks but i kept the super for ones. then started looking at them and noticed that in one of them, one of the electrodes was smashed against the centre!!! I have NO idea how this happened as i'm always careful when placing sparkplugs in any car- first you spin it by hand with the sparkplug socket(with a socket extension), and when i cannot tight any more by hand I still look, just to be 200% sure, if the sparkplug is well aligned in the hole, and only them I finalize the torque with a torque wrench. I really haven't a clue on why the one electrode on that sparkplug was bent like that, but it was only in that one, so it could not have been by the cylinder hitting it!!!-a far fetched idea anyway.... I bent back the electrode, installed the spark plug's and the engine works fine, revs up nice and all-so it could be only of that spark plug that was not allowing explosions in one of the cylinders. cheers everyone! |
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8:36 PM Jul 11