Solution to 1.9JTD water pump? - Alfa Romeo Forum
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Solution to 1.9JTD water pump?

Not really an Alfa but I have a Fiat Sedici 1.9JTD 8v.

The book said 96k cambelt interval or 8 years. The car is 6.5 years old and has done 60k.

A screaming noise appeared on Monday, at first I thought it was the Aux/fan belt but thought I better have a look. On opening the bonnet the cambelt had literally eaten it's way through the plastic cam belt cover. Luckily it had not slipped or come off.

The garage confirmed the water pump had destroyed itself and I had had a lucky escape.

Are there any metal options for the pump as I keep reading about these failures?
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I find it strange that Fiat recommend 90k or 5 years (3 yrs adverse conditions) yet the same engine in the ALfa is 72k and check at 36k.

I think most decent pumps are metal.
Fiat Sedici 1.9 JTD Water Pump 46515970

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Seems that in the book Alfa still recommend 5 yrs 90k, but in person it's a lot shorted, suspect the same is true for Fiat.
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My info is from Autodata, though not the most up to date one
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(Post Link) post #5 of 14 Old 05-02-14 Thread Starter
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This was what was left of my cam belt cover.




Lucky escape I caught it.
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Even if the waterpump impellor is metal, it doesn't stop the bearing failing & seizing and snapping the cambelt.

I think the solution which is almost a guarantee against failure is to change every 4 years / 48k.
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Have you had many 8v JTD pumps fail?
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very rare indeed for tha 8v pumps to fail..

BTW, Giulietta JTDM is also 90k or 5 years interval, 4 years for severe conditions...
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Quote:
Originally Posted by Cuore_Sportivo_155 View Post
very rare indeed for tha 8v pumps to fail..

BTW, Giulietta JTDM is also 90k or 5 years interval, 4 years for severe conditions...
Agreed - 8v waterpump is robust. It's the multi-valve pump you want to watch out for.

And as Dan says, on this waterpump the impellars are irrelevant. It's the seals and bearings inside the waterpump that are the issue.
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Quote:
Originally Posted by David C View Post
Have you had many 8v JTD pumps fail?
No, not many. We have had a waterpump seize up on our 8v JTD courtesy car, I reckon it had a couple more minutes of engine running before the belt would have failed, we luckily just caught it in time. The waterpump could barely be turned by hand once off. We even changed out an original waterpump last year which had done over 220,000 miles. The same belt had been on there since the 72k service too! Same story for the 10v, I've hardly ever seen any cambelt failures or waterpump seizures. Thing is a 8v/10v pump look very similar to a 16v/20v pump anyway and they're from the same manufacturer... So maybe they're just more stressed by having all that extra mass to turn.

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as failed pump bearings go how does this rate , mild or bad ?
ALFA 156 1.9 16V JTDm 140 CF3... FAILED WATER PUMP - YouTube

ALFA 156 1.9 16V JTDm 140 CF3... FAILED WATER PUMP off the engine - YouTube

not mine , just found on you tube

and as pumps go is one brand better quality than another ? do you see more failed brand x than brand y ?(for 16v pump this is)
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That is bad, but it hasn't seized it just has massive amounts of play in it. They don't always fail like that, sometimes the play is not anywhere near as bad but the pump has almost seized.
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Most of the ones we see failed are the original pumps. But thats because they are the oldest and have done the most mileage. Theres probably still 156 16v diesels out there with big miles on the original pump though.
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The actual pulley of the pump siezes solid and the belt continues to pass over it so its the friction that snaps the belt. Its not that common on the 8v engine. But if the belt comes off its a valve bender. Quite common on the 16v but it just snaps the rockers as there is enough clearance between the pistons and valves. We always advise the pumps to be replaced with the belt every 5 years or depending on the mileage. The belt should be done every 5 years regardless of mileage but the pump can be left if its only covered a low mileage. But we always check the pump for play and noise everytime
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