Hi folks

I've just changed the cambelt, tensioner and waterpump on my 100HP and would like to know if I also have to do a phonic relearn as with some other Fiat models?

The engine is running smoothly and normally as it was before I did the change. There's no warning lights.

It was quite a time consuming job, the inner engine mount is a very tricky to remove and refit with 6 horizontal bolts and very little space between the engine and the chassis.

I used a toolkit with the measuring rods and locking tools. I found the wedge tool that locks the camshaft pulley didn't always engage properly with the teeth due to the pulley position. I had to make a pulley holding tool from steel strip to secure it when undoing/torquing the pulley bolt (120Nm).

Did have a bit of a fright when I started the car after everything was back together. The car didn't want to start and was running very roughly. Ahhhh

It turned out one of the coil packs hadn't seated firmly enough on the sparkplug. :bang:

I've taken a few photos as I did it and will upload them to the forum soon.

If the engine light is not flashing,it won't need a relearn.

multipete said:

If the engine light is not flashing,it won't need a relearn.

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Good news, thanks.

Here's some photos


Old belt, it was a Dayco one and looked in decent condition for 5 years old, no cracks or splits.


Old belt waterpump & tensioner removed


Waterpump hole


New and old waterpumps


New waterpump with Loctite RTV applied

Second half of photos:


New parts fitted, belt ready to be tensioned


Setting the tension. I ordered a new tensioner retaining nut from the Fiat dealer. It cost £3.50 but it held the tensioner more securely than the original nut did.


All done, ready to have covers and engine mounts refitted. I used a Dayco kit.


The pulley holder design is from the Haynes Panda/500 manual. The main strip is 600mm long and the smaller is 200mm.


Closeup showing the M10 x 50mm bolts and nyloc nuts.

Nope

No need to re calibrate the sensor

The mechanic that did mine said it was a bit of a swine to do, he reckoned the water pump is good for 100k but I said might as well do it anyway (75k).

Next project - change a 1.3 Multijet timing chain!
Only the brave .......

Gavv8 said:

The mechanic that did mine said it was a bit of a swine to do, he reckoned the water pump is good for 100k but I said might as well do it anyway (75k).

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There's so little space between the engine and the side of the chassis/body that makes it such a pain.

The Grande Punto with the same engine seems to have acres of space from the photos I've seen.

The inner engine mount is the hardest part to remove & refit. Getting at all 6 bolts required jacking the engine up to the max and lowering very low as well. Even then it was a pain to loosen/tighten some of the bolts.

It's definitely worth changing the waterpump at the same time, since the hardest and most time consuming work is getting access to that part of the engine, rather than replacing the timing parts.

For ****ing horrible job access try doing a Punto Mk2 HGT.

I ended up with cheapo screwdriver set torx bits and an 8mm ring spanner to remove the belt covers. No way could I get a torx angle key into the job and professional (10mm AF) bits were too long. It also needs special cam locking tools and the the aux belt tensioner is a bar steward

- and - breathe.

PS

And when I'd done, I realised the new water pump was still sitting on the garage floor.

Anyone want a Punt HGT water pump? It will probably also fit the Alfa TS engines.