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Install aftermarket fuel check valve

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
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2003 - 2007 S60 R

rootleaf
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rootleaf

Install aftermarket fuel check valve

Post by rootleaf » Sun Feb 23, 2020 8:28 am

Have an 07 S60 2.5t. The fuel rail looses all pressure after sitting overnight which produces long crank time hard start. The fuel pump and relay are good car runs beautiful just losing the fuel pressure over the course of several hours down to 0 pressure. I do not smell fuel loss anywhere so will assume from what I read on the forums its the check valve which is built into the fuel pump. I can survive by just turning the key to position 2 for a few seconds which builds the pressure up and then I get an immediate start which I have been doing in the meantime. But I am toying with installing an aftermarket check valve somewhere since I dont want to take on the task of replacing the pump over something as trivial as the check valve that is not affecting drivability. So, I do see some people have done this on previous year model cars but I dont see anyone trying it on s60 2001-2009. Can anyone tell me if it has been done, where the best place to install is and is there a particular check valve requirement or any aftermarket check valve will do? I would like to find a spot under the hood to install it for ease of access. Interesting enough, we have had 5 volvos with this same engine and two of them with over 250k miles yet this is the first one to develop this problem with only 112k miles.

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oragex
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Re: Install aftermarket fuel check valve

Post by oragex » Sun Feb 23, 2020 10:40 am

Do you have a fuel pressure sensor at the rail ? I would look into that one first.

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abscate
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Re: Install aftermarket fuel check valve

Post by abscate » Sun Feb 23, 2020 11:26 am

Spec on P2 is something like 52 PSI while running, and 30 psi after 20 minutes

There is no spec for overnight, so I would not put any hardware in until you check against spec.
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Re: Install aftermarket fuel check valve

Post by RickHaleParker » Sun Feb 23, 2020 12:36 pm

rootleaf wrote:
Sun Feb 23, 2020 8:28 am
Can anyone tell me if it has been done, where the best place to install is and is there a particular check valve requirement or any aftermarket check valve will do? I would like to find a spot under the hood to install it for ease of access.
I would install it as close to the fuel pump as practical. To prevent the fuel line between the aftermarket check valve and the pump from draining.
--------
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.
Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.
Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
Platform P2 2004 S60R, B2524T4, AW50/51 AWD, Bosch Motronic 7.0, BorgWarner K24 turbocharger, Plant Ghent Belgium.

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