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Discussion Starter · #1 ·
Hi

I have a tapping noise from the left hand side of the engine, I'm not sure if its a ge related because my alfa 147 1.6 has done nearly 132,00. The noise only comes on when engine starts to warm up and it's there when engine is hot I have spoken to 2 mechanics one said most prob needs oil change but use 10w40 semi as it lubricates the engine and components better especially if the car is used on shorts runs, anyway I changed oil and filter but noise come on again when hot. So couple months later I asked a different mechanic and was told to use fully synthetic 10w40because when engine is hot the oil does not break down and stays like 10w40 whereas semi when warm breaks down when hot to 10w30.....not sure if this makes any sense! Anyway second mechanic recomend fully synthetic on high mileage 16v engines.

The car still runs fine but would rather the noise not there, I want to sell it soon and want to get a jtd and don't want to put people off with the engine noise... Maybe I being fussy

Would appreciate any recomendations


Ps I 95% certain it's not the variator
 

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10W40 Semi does not turn into a 10W30 when hot.

10W40 Semi is fine. 10W40 Synthetic of 5W40 Synthetic will be better, but probably not the reason for the noise.

When you say "left", do you actually mean left (ie the gearbox end)?
 

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Discussion Starter · #3 ·
I think it's what the belt goes on?? Sorry not mechanically minded, I can here it on left side of engine and its a bit noisier at the bottom of engine (on left side)
 

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There are two lefts of you engine.

The left side from the drivers seat, or the left as you are looking into the engine.
 
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God .... Dont you just love these non descriptive noise threads that people think we can solve for them when they can't really tell you where it is coming from:rolleyes::lol:

It could be a myriad of things... but a clicky tensioner on either the auxiliary belt or cam belt or even a noisy purge canister motor would be my guess... No way of telling without knowing an exact location..."left or your other left":lol:

One things for sure... If your oil is topped up correctly... It certainly isn't that... Take it to an Alfa independent specialist for a check over if in doubt... Especially if a "mechanic" has fed you that kind of piffle!
It's a good idea to start making friends with the specialist staff if you want a JTD soon... They are good cars and engines but in the wrong hands without being even remotely mechanical minded, they tend to be a little more complicated to keep tip, top;)
 

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Discussion Starter · #6 ·
The left side when your looking at the engine with the bonnet open, I'm sure it's coming from where the belt is attached to the side of the engine?

The 2nd guy said not to worry about it as it will go on and on...fix it if it brakes was his saying, but it's just one of those annoying in wanted sounds but prob nothing can be done as its an old car. The first guy was a alfa specialist and recomended the oil change and use semi synthetic.

I bought the car 2yr ago from an alfa specialist it's was a cambelt failure but they replaced cambelt with a whole new bottom end, it still now runs sweet it drives fine and pulls fine it uses hardly any oil or water.

Is it worth trying out fully synthetic oil? Or is the first guy right in saying use semi as its better for short journeys and helps lubricate better?

Cheers
 

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Is it worth trying out fully synthetic oil? Or is the first guy right in saying use semi as its better for short journeys and helps lubricate better?

Cheers
Nope - full synthetic is much better for short journey's as it has far better cold start characteristics.. a 10w40 full synth, is far better when cold vs a 10w40 semi.

It also handles fuel dilution far better, as you will get plenty of that if you mainly use the car for short runs..

But I'm certainly no expert.. here's a good read - Motor Oil 101 - Bob is the Oil Guy
and... ausalfa.com • View topic - 10w-60 Oil suggestions, NOT selenia

As for the noise - can't help you there sorry..
 

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Discussion Starter · #9 ·
If there is wear on the cam lobes wouldn't the noise be there when engine is cold? Cause it only comes on when warm/hot
 
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