AArgh...and now there's diesel dripping frm the cooler matrix area...

[soixante-quinze]

...and I see from Rimmer that it's a complete replacement unit.:mad: Anyone with experience of a failure in this area? Is it likely to be the matrix or more likely a pipe or union or similar?:confused:

[mark_bonsai]

There's three on eBay at the moment for under £40

[rossocorsa]

they drip from the unions at top and bottom of the actual matrix due to microscopic cracking of the pipe where it is soldered/welded or whatever to the matrix . You can short circuit the cooler with a piece of fuel pipe after dropping the matrix from the unit (simply remove the bottom retaining clip that sits along the bottom of the little radiator) .That way the car is still drive-able and if you only do short runs will be fine for a short period. I got a radiator repair specialist to look at the cooler matrix he sealed the unions with a special resin and they have been fine since ...the bill £15..... the hassle and amount of stinky diesel on me ...priceless:}

I think the unions fail because of constant vibration of the pipes and bad construction/design it's something all CDT/CDTi owners should keep an eye on it will only drip when the thermostatic valve is open so with the car at idle the drip comes and goes

[Jules]

Anyone noticed a detrimental effect with this bypassed?
I've not tried it yet but possibly the cooler is only needed on a really hot day:shrug:

[Mike Noc]

Anyone noticed a detrimental effect with this bypassed?
I've not tried it yet but possibly the cooler is only needed on a really hot day:shrug:

If you are going to do it probably best to keep the tank as full as possible so you are not constantly recirculating the same fuel.

Mike

[rossocorsa]

Anyone noticed a detrimental effect with this bypassed?
I've not tried it yet but possibly the cooler is only needed on a really hot day:shrug:

I think it matters they never deleted it under project drive did they:shrug:

The workshop manual suggests that hot fuel suffers with a reduced viscocity and gives that as the reason for the cooler

[soixante-quinze]

Turns out to be a small crack in one of the pipes brazed onto the matrix as you guys predicted. Thanks!

[James.uk]

OP So how did you repair it please.. :)

When Peugeot came out with their first common rail injection unit they found that the returning fuel was so hot it melted though their plastic fuel tank! :o

Hence the birth of the cooling matrix.. :)
...

[Jules]

I have a brand new OEM cooler somewhere!
Must dig it out and put it in my shop.
I'll make sure it's priced cheaper than the big boys don't worry:cool:

[rossocorsa]

I have a brand new OEM cooler somewhere!
Must dig it out and put it in my shop.
I'll make sure it's priced cheaper than the big boys don't worry:cool:

don't forget that there are two different assemblies for 2 pump and single pump cars..although the actual matrix is always the same