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post #1 of 28 (permalink) Old 27-11-2021, 07:54 Thread Starter
GMJ
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Timing belt and/or water pump?

My MH is now 4 years old and as such the advisory is coming that I should change the timing belt. Fair enough (although it annoys me as the previous MH with the previous range of engines had a chain in the 3litre version which was altogether a better engine than the newer 2.3litre version imho).

So do I turn and expensive job into a doubly expensive job, by changing the water pump whilst I'm at it?

Or not?

I am not experiencing any problems with the current water pump.

ta muchly
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post #2 of 28 (permalink) Old 27-11-2021, 07:59
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Yes G, it is recommended and I had to.

Ray.
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post #3 of 28 (permalink) Old 27-11-2021, 08:11
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From a mechanical point of view there are two reasons to change the water pump at same time as the cam belt.
On this engine the water pump is driven by the back face of the cam belt, which means should the water pump bearing fail not only will it leak your engine coolant away it will destroy the cam belt which will result in a very expensive failure of the engine.
All of the work to change the cam belt is necessary to change the water pump, with around an hour extra labour to change the pump if done at same time as belt, (so long as the high pressure fuel pump comes out of its housing).

The added expense and the fact that it is not a replacement required in the guide lines of Fiat are perhaps reasons not to do it.

Do you feel lucky punk


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post #4 of 28 (permalink) Old 27-11-2021, 08:13 Thread Starter
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I'll need to get some quotes in I think. The Fiat Service Centre quoted around 600 for the timing belt kit and 1200-1400 quid for the full monty. I didn't even ask if that included labour! There is another garage I use who do commercials and do my MOT (and did the oil service last year) so I'll get a quote off them.

The MH has only done less than 18k miles so I think the water pump would probably be OK.

What's the downside of the water pump fails? I appreciate its a job and a half to get it out but if caught quickly, are there any bigger issues/problems if it fails?

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post #5 of 28 (permalink) Old 27-11-2021, 08:17 Thread Starter
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Quote:
Originally Posted by eurajohn View Post
From a mechanical point of view there are two reasons to change the water pump at same time as the cam belt.
On this engine the water pump is driven by the back face of the cam belt, which means should the water pump bearing fail not only will it leak your engine coolant away it will destroy the cam belt which will result in a very expensive failure of the engine.
All of the work to change the cam belt is necessary to change the water pump, with around an hour extra labour to change the pump if done at same time as belt, (so long as the high pressure fuel pump comes out of its housing).

The added expense and the fact that it is not a replacement required in the guide lines of Fiat are perhaps reasons not to do it.

Do you feel lucky punk


.
Thanks John - I guess you answered my post before I posted it. Psychic

The Fiat guy mentioned that there were 3 different types of water pump. Is there an easy way of finding out the correct one I'll need? Or does it have to be whipped out to get that info?
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post #6 of 28 (permalink) Old 27-11-2021, 08:19
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As I remember our Fiat 2.8L was about £450 but more recently the Tiguan was €600 with service included. But costs do go up that sounds somewhat exorbitant.

Ray.

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post #7 of 28 (permalink) Old 27-11-2021, 08:35
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Ours for both was around 800€ so compatibles with Ray’s figure.

False economy not to change as Murphy’s Law LOVES engines with low mileage…. Ours is now on 4th belt and third pump (original owner was cheapskate) and has done 32000 miles, it is a 2003…..

Last one done at Renault garage locally, very helpful small company who do all our MH servicing and who I trust implicitly.
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post #8 of 28 (permalink) Old 27-11-2021, 08:49
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Johns assessment is from a professional viewpoint and very valid G. We often think routine servicing is not always as necessary as the agent or manufacturer makes out. But when they are proved right by some catastrophic failure once in a while, can we take that risk? Cos thats what it is, a big risk.!

There are great differences in the recommended kms to do the change of the belt, pump, tyres, etc. between manufacturers but peace of mind is worth a few bob.

Ray.
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post #9 of 28 (permalink) Old 27-11-2021, 09:06
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Go to a private garage and deffo do the pump and idler/tensioner, might end up similar to Fiat prices.
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post #10 of 28 (permalink) Old 27-11-2021, 09:22
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I personally would not change until its 5 years old if it only had light use Fiats 4 year recomendation covers all motorhomes with both low and heavy usage and i would change the waterpump in both cases
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