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(Post Link) post #1 of 21 Old 10-02-05 Thread Starter
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Vibration after cambelt change

After two days of waiting. Finally i got my car back this morning. It had a full major service,new water pump plus cambelt, tensioner and roller bearing. ( 61,000 miles on the clock. Cost me over 1070 for this job ) My car run without any problem on the way home. ( The car never have any problem since my ownership for the past 9 months ) When i stop for the traffic light. I realised unusual amount of vibration from the engine. I dont feel any problem on the way back from M4 and the temp is OK. So i decided to continues my journey back home. When i open the bonnet. ( Kept the engine running ) The engine seen vibrate more than usual with some rolling noice. Also a lot vibrateion and noise from exhaust. Anyone got any idea what might went wrong ?
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wrinx
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Re: Vibration after cambelt change

Wonder if they used camlocks? Might be that something moved and the timing is now out a little bit.

Was it a specialist or main dealer? ...and 1070 what, or

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Re: Vibration after cambelt change

It is an Alfa/Flat specialist in west London. It cost 1070 UK pound. Cambelt plus full service offer in their website 695 inclusive. It seem like a reasonable offer. 30 minutes after i drop the car. A phone call from the mechanic said that water pump need to be replace and a few small bit and pieces. Another other phone call two hours later said all spark plug need replacement ( Cost 120 ). Is 1070 seem reasonable ?
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Re: Vibration after cambelt change

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Originally Posted by 166racer
It is an Alfa/Flat specialist in west London. It cost 1070 UK pound. Cambelt plus full service offer in their website 695 inclusive. It seem like a reasonable offer. 30 minutes after i drop the car. A phone call from the mechanic said that water pump need to be replace and a few small bit and pieces. Another other phone call two hours later said all spark plug need replacement ( Cost 120 ). Is 1070 seem reasonable ?
I suggest you contact them straight away and ask them what to do, it is possible that tensioning of belt may be required again and possible slippage may have occured.. play it safe.

As for price, that seems pretty steep but not out of the realsm of Alfa possibilities. My 72k mile service which was cam belt, plugs, oil and all gaskets etc for inlet pipes (loads of em as you know) was just under 600 and that was main dealer, add waterpump and any extra's and I guess you would be pushing not far off a grand. I take it you have a detailed breakdown of parts and labour costs?


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Re: Vibration after cambelt change

that is a hell of a lot of money to part with you must love the car who was it who serviced it? seems steep for independant
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Re: Vibration after cambelt change

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Originally Posted by fletch
that is a hell of a lot of money to part with you must love the car who was it who serviced it? seems steep for independant
Yes it is a lot of money for my 6 years old car but i m loving it. The car had never cost me any problem since under my ownership and i intended to keep it as good as it can be. The independant is in West London. An Alfa/Flat specialist. I found them in Autoitalia magazine.

Took the car back to the specialist last Friday. They checked all the spark plug, cambelt timing, airflow meter. All seem fine but the engine still vibrate more than usual with some rolling noice. Took the car back this morning. They reckon it might be somthing to do with the injector. Finger cross and hope they will sort it out this time.
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Re: Vibration after cambelt change

How did you get on with this ??

I got a call from the chaps servicing my car today and they said that the top mouting bush on my 166 had gone and was causing a slight vibration !!
 
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Re: Vibration after cambelt change

wow, this is an old thread, but I'm having exactly the same problems at this moment! Last week I had my cambelt changed (including all pullies and stuff). Since then, the engine vibrates, especially when idling. Also, when driving with a constant speed, it feels like the engine isn't running perfectly smoothly, but ever so slightly.

The guys at the garage checked everything, assured me the timing is correct, also the air flow meter is functioning properly, they even cleaned something that I don't know the English name of, but the problem still exists. Also, I think they replaced the top mounting bush, if I understand correctly what's meant by this.

They recommended that I change the spark plugs. I will do that, but given the information in this thread, that might not be the problem. Also, they (and myself, and a friend of mine) think it feels like one of the 6 cylinders isn't working properly.

Maybe someone can shed some light on this, since I feel this thread hasn't quite given the answer to the initial problem.

Thanks,
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Re: Vibration after cambelt change

Faulty tensioner belts, quite possibly. Ask your garage to check them thoroughly, and don't let them fob you off.
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Re: Vibration after cambelt change

sounds like the timing belt is off in the timing, either its slipped or the tensioner isn't set correctly.
If its an injector or spark plug then remove and replace the fuel injector plug for ech injector. There should be a change in engine note/smoothness with ech one. If there isn't with a particular plug thats your problem cylinder.
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Re: Vibration after cambelt change

Quote:
Originally Posted by Sandyman
wow, this is an old thread, but I'm having exactly the same problems at this moment! Last week I had my cambelt changed (including all pullies and stuff). Since then, the engine vibrates, especially when idling. Also, when driving with a constant speed, it feels like the engine isn't running perfectly smoothly, but ever so slightly.

The guys at the garage checked everything, assured me the timing is correct, also the air flow meter is functioning properly, they even cleaned something that I don't know the English name of, but the problem still exists. Also, I think they replaced the top mounting bush, if I understand correctly what's meant by this.

They recommended that I change the spark plugs. I will do that, but given the information in this thread, that might not be the problem. Also, they (and myself, and a friend of mine) think it feels like one of the 6 cylinders isn't working properly.

Maybe someone can shed some light on this, since I feel this thread hasn't quite given the answer to the initial problem.

Thanks,
Sander
Sander

I have the same problem with my vehicle , I have had the MAF replaced twice and still the same problem , very poor idle , uneven running. Plugs have been changed and no fix still. Alfa dealer here in Australia says diagnostics show nothing wrong with sensors , but they don't seem to want to trouble shoot the problem any further. So if anyone has any further ideas I would appreciate it also.

Cheers
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Re: Vibration after cambelt change

Hm, I'm having all my spark plugs changed next week, but after reading your post, I think that might not help...

I'll make sure to post my findings here. If any one else has an idea, let us know, it's greatly appreciated.

Sander
 
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Re: Vibration after cambelt change

I had the spark plugs renewed last week. It seems to improve a little bit, but I'm not quite satisfied. I'll try the meter for the airflow next...

Sander
 
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Re: Vibration after cambelt change

Story continues...

Today, I finally had the chance (and the tools) to change the Air Flow Meter. It didn't seem to make such a big difference. Over time, the engine has started to run just a little smoother since the cam belt change (or I've gotten used to it) and after I renewed the spark plugs.

Somewhere on this forum, I read that after you change things like the AFM (MAF?), you should run the engine stationary for like 15 minutes or so, and then "give it a good thrashing" (yes, I quote). What exactly is the purpose of this? Should I give this a try to see whether it helps?

I'm at my wits end regarding this problem (although it really is only a problem when running stationary).

Thanks,
Sander
 
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Re: Vibration after cambelt change

i think that's referring to an ECU reset....you don't really need to do anything after changing the MAF i don't think, although i guess a reset of the ECU might be helpful. Giving it a thrashing after is so that it learns a more aggressive driving patern i think....
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Re: Vibration after cambelt change

Okay, well, I did it anyway (I'm sorta stuborn). But... no good result. Car is sluggish, doesn't respond well to the throttle, doesn't any more than 5000 revs... It's slow where it used to be very sporty! I drove it for around 35-40 minutes and it did seem to improve ever so slightly, but I'm a little worried...

I wonder, what could be the cause. Could the new MAF be faulty? Should I try the old one once again?

I hope there's someone who has a clue, because it is not nice. My 166 used to be very sporty, but that's completely gone for now.

Thanks,
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Re: Vibration after cambelt change

the maf could be dodgy - was it a cheap one from ebay or a genuine bosch one? I had a couple of awful ones from ebay that were worse than useless....
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Re: Vibration after cambelt change

Indeed bought on eBay, but I think it's a genuine Bosch.

So you think it's probably the MAF?
 
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Re: Vibration after cambelt change

i think a car failing to rev past 5k indicates a duff MAF - if you disconnect it and the car still feels the same then the MAF is faulty....
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Re: Vibration after cambelt change

This morning I put back in my "old" MAF, and guess what! The engine isn't sluggish anymore. No problems revving beyond 5k. I guess my own MAF is actually better than the new one. Will try to get a decent one from the seller.

Thanks,
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Re: Vibration after cambelt change

there are a lot of crappy bosch copies out there in ebay land...try to get a genuine one (either from alfa or from bosch) if you can....
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