CP Series fuel pump

[Paul Carey]

My CP series pump is clearly not the original. It is mounted under the rear nearside wing, behind the wheel. In the last year it has routinely leaked a few drops after being left for a few weeks but this normally clears up after a couple of minutes - today, after a two month standstill over winter it leaked profusely. I think I need to replace it (or at least the seals if I can).

 

I cannot identify the make of pump but it is a simple cylindrical affair, and looks nothing like the Bosch version shown on the Moss website. It does not look like it comes apart easily but I guess it must somehow (I have not yet taken it off).

 

Main question: what is the best pump to get as a replacement?

 

Incidentally the twin filters are inside the boot and badly plumbed in, and I understand I actually have a TR4 tank. Does anyone have a spare TR6 tank from this series they want to sell?

 

Paul Carey

[Markymark]

Paul,

 

best idea would be to talk to Malcolm from www.prestigeinjection.net

 

The Bosch brand is probably the best choice. There are different pumps available from Bosch that will be able to replace your pump. The ones Malcolm uses are quite modern ones that are a bit smaller than the ones you can see in the Moss catalogue. The fitting on the pressure side of the new pump should match! Otherwise add new fittings or a suitable adapter to your calculation.

 

Best regards,

 

Mark

[Paul Carey]

Thanks Mark

 

Yours is the only reply in 10 days or so but very useful.

 

Paul

[88V8]

I think a lot of us were off the forum over year end, and perhaps we haven't read back over all the topics.

 

Yes, Prestige.

Here's his setup in my boot.

 

I think there's a difference between late and early TR6 fuel tanks, something to do with early cars not being designed to go round corners. Someone will fill in the details. If you have a TR4 tank it must have been modded as the connections would be wrong; is it in some way troublesome ?

 

Ivor

 

[Paul Carey]

Thanks Ivor

 

I will contact Prestige - as it happens the leak seemed to cure itself (again) so I suspect it is just dry seals expanding as they get wet (the car was still for 2 months).

 

Do you have twin filters on yours?

 

Paul

[RobinTR6]

Thanks Ivor

 

I will contact Prestige - as it happens the leak seemed to cure itself (again) so I suspect it is just dry seals expanding as they get wet (the car was still for 2 months).

 

Do you have twin filters on yours?

 

Paul

 

Sorry to be tardy. Malcolm is on holiday I think till 18 Jan. He'll be able to sort you and get the correction connections for your tank or advise what to do. He really knows his eggs.Let us know how you get on.

[nickw71]

Hi Paul

 

It sounds as though you have one of the eary Bosch conversions that simply exchanged the old Lucas pump for a Bosch one and located it in the same spot on the wheel arch. Rimmers still sell this set up. I have the same on my recently restored CP TR6. See the attached photo.

 

According to all the books this isn't a very satisfactory arrangement as the Bosch pump in forced to pull up fuel from the filter below it. Something it wasn't designed to do as it relies on gravity feed. See Neil Revington's datasheet attached which tells you all you need to know.

 

My pump is also very noisy which apparently means its not getting enough fuel to work effeciently and the boot absolutley stinks of petrol. Apparently modern, more volitile unleaded fuels permeate rubber hoses and consequently the boot smells of petrol. My car also has an occasional hesitent misfire which I suspect, as everything else is brand new and well set up, could be slight fuel starvation.

 

So for these reasons I am planning to either fit the Prestige kit or Revington kit. The Revington kit has the option of being mounted externally behind the wheel arch so eliminating any chance of fuel smells. Disadvantage is that it is £100 more. Both always have excellent write ups so you pays your money and take you choice.

 

Regards

 

Nick

[RobinTR6]

You can buy a Bosch pump, two fuel filtere, before and aft (I used Fiat Punto ones) and buy the hoses etc and mount wher you want. Did this a while ago on a previous TR6 and despite some concerns exopressed drove the car for a year without any problems. I know that the subsequent owner hasnt had any problems either. Why bother, well I was considerably cheaper than an off the shelf package about 50% of the cost. BTW got the pump wher many of the specialist get theirs..

[Guest ntc]

Hi Paul

 

It sounds as though you have one of the eary Bosch conversions that simply exchanged the old Lucas pump for a Bosch one and located it in the same spot on the wheel arch. Rimmers still sell this set up. I have the same on my recently restored CP TR6. See the attached photo.

 

According to all the books this isn't a very satisfactory arrangement as the Bosch pump in forced to pull up fuel from the filter below it. Something it wasn't designed to do as it relies on gravity feed. See Neil Revington's datasheet attached which tells you all you need to know.

 

My pump is also very noisy which apparently means its not getting enough fuel to work effeciently and the boot absolutley stinks of petrol. Apparently modern, more volitile unleaded fuels permeate rubber hoses and consequently the boot smells of petrol. My car also has an occasional hesitent misfire which I suspect, as everything else is brand new and well set up, could be slight fuel starvation.

 

So for these reasons I am planning to either fit the Prestige kit or Revington kit. The Revington kit has the option of being mounted externally behind the wheel arch so eliminating any chance of fuel smells. Disadvantage is that it is £100 more. Both always have excellent write ups so you pays your money and take you choice.

 

Regards

 

Nick

 

 

Nick

The pump must be below the fuel tank to work properly,place it outside or the opposite side in the spare wheel well