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Discussion Starter #1
1. I've noticed that the tak tak sound on start up is now lingering longer than the few seconds it used to. Its probably sticking around for about a minute.

It really doesn't sound right to me? Once warm the sound goes away and the engine purrs. Want to nip it in the bud before it become a real problem.

2. I've noticed a significant power increase after 4000rpm. I.e. it pulls but then you feel a surge as it revs past 4000rpm. Is this a normal characteristic of the busso 24v engine?

3. the wiper sprayers have stopped working. can hear the pump whining but nothing comes out of any of the jets. any ideas as to a solution?

Thanks
 
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Yes the extra surge of power after 4000 revs is normal for the Busso. Driven numerous Busso's in my lifetime and they all come alive after 4000 revs. Love it when does that!
 

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You can see the kink in the torque curve at 4k here (this is actually for the 2.5L in the 156):

ImageUploadedByTapatalk1324565129.187061.jpg

Is that just due to better gas flow as the revs pick up? There's no cam phasing on the Busso, is there?

Would be interesting to compare to a graph from the 12v version, would expect the initial pickup to be improved somewhat.
 

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I agree with the guys. Although the Busso is reasonably strong low down the torque come on after 4000.

If the water is not leaking at a spot where the tubes as broken, take a needle and push it into the nozzle. They are just blocked, the needle is also the easy way to direct the stream of water.
 

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Don’t drive the car before you had the cam belt tensioner checked. The sound normally happens if the tension is to low at start-up and then disappears when the motor warms up.
GET THE TENSION CHECKED!!!!!!!!!!!!!!
 

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Discussion Starter #8 (Edited)
Don’t drive the car before you had the cam belt tensioner checked. The sound normally happens if the tension is to low at start-up and then disappears when the motor warms up.
GET THE TENSION CHECKED!!!!!!!!!!!!!!
Thanks Turbo, I wish you lived in Durban!
Phoned a guy who's going to check it out. Can I just get the tensioners changed or must I do a new cambelt. Cambelt was done at 85k and its on 115k at the moment.


Update:
quoted 4000 to do tensioners and pulley only and 5600 to do cambelt tensioners and pulleys. Still have to take it in to have it checked tho.
 
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It's the tensioner as mentioned above . It's to loose . As it rattles back and forth. OR depending on the sound it could be one hydraulic lifter not getting pumped up.
With regard to wiper sprayers get a needle and scratch the wiper spray opening as it can get clogged with polish .

Just reset the tensioner . No need to change belts if that is the noise.
 

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Discussion Starter #10 (Edited)
It's the tensioner as mentioned above . It's to loose . As it rattles back and forth. OR depending on the sound it could be one hydraulic lifter not getting pumped up.
With regard to wiper sprayers get a needle and scratch the wiper spray opening as it can get clogged with polish .

Just reset the tensioner . No need to change belts if that is the noise.
Thanks Krasch and turbo
I'll take a video tomorrow and you can listen out for the sound.

Update:
Been reading up on cambelt tensioners and found this video which sounds almost identical to mine on startup:
https://www.youtube.com/watch?v=4YqFLnRIAFk from thread http://www.alfaowner.com/Forum/alfa-gtv-and-916-spider/276945-new-unknown-engine-noise-1998-alfa-spider-2-0-ts.html which identifies the noise as a cambelt tensioner.

Don't really have R4000 to spend on a cambelt tensioner (doing a trip to lesotho and need two new Wrangler A/T tyres for the bakkie before I go) so trying to find out how to reset.
 

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They can adjust the tension no need to replace it now.

But replacing it will be best.
 

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Video 1 is normal that’s the electronic butterfly playing with itself.
Video 2 definitely sounds like the tensioner and it is bad get it sorted asap.

Haven’t seen a failed belt on them but a couple of failed tensioners
 

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Discussion Starter #14
Thanks Turbo for getting back to me.

Spoke to my Alfa Mech and he asked if its the cambelt tensioners or the fan belt tensioner (he said that in his experience the cambelt tensioners don't make a noise and that its more than likely the fan belt tensioner??)

I just want to clarify which part he must order (unfortunately he is an hour away so can't just pop in for a check)
 
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My race car with same engine made same noise and it does not have a fan belt . The tensioner was hectically loose . I have never heard the fan belt tensioner make that noise even on a wrong size belt (I have other cars). But then again if I'm wrong , don't hold me to it as this is only a forum not a guaranteed one stop problem solving centre
I just paid R1500 for a cam belt tensioner for my 916 series spider two weeks ago( 3.0 24v) - who quoted you R4000 ? Also the fan belt tensioner about R 600 .
 

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Discussion Starter #16
Thanks Krasch for the input. Yes just looking for similar experiences and/or possible clues to the problem.

Have finally found a reputable mech who will be looking at the car when I get back from holiday (not the chancer who quoted R4700). He reckoned the cost of the parts plus R200 labour to sort it out.

Will give feedback once I've had it worked on
 

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My vote is also on the cam tensioner. My v6 did this and ironically, it was a new tensioner. Spend the money now cause if this goes its allot more. Not sure where these guys come with pricing as its 9k to do both bearrings, belt, tensioner and waterpump through the agents. and we all know how they like to charge for labour. so 4K is really excessive
 

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Spares alone will be close to R3000 depending on where you get it it could be a lot more and that's without a water pump. A new tensioner will be noisy if not set properly. If a specialist never encountered a noisy one he probably only worked on nords and old 12v's.
 

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Had the same problem with the tensioners on my GTV. Cost me just over R1K to sort out at a Alfa Indy
 

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Yes he just adjusted it which is fine depending on how long its been running against the stopper.
 
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