B58TU HPFP Fitting Guide on Gen1 B58

340, 440, b58, hpfp, m140, m240 -

B58TU HPFP Fitting Guide on Gen1 B58

The B58TU hpfp is a good upgrade to the fuel system in the gen1 B58 engines. Allowing you to run more power with higher ethanol concentrations.
Parts needed:
1 x B58TU high pressure fuel pump
1 x HPFP wiring harness extension
BEFORE STARTING THIS JOB, DISCONNECT BATTERY.

b58tu b58 hpfp williams performance ltd m140i m240i tuning

First steps are to remove the engine cover and the rubber trim on each strut top and the bottom of the scuttle panel.

b58tu b58 tuning williams performance hpfp

Then remove the plastic panels at either side. These are held in place by plastic 10mm screws, they only need 1/4 turn.

b58tu b58 tuning williams performance hpfp

After this we remove the two plastic grommets at the centre of the scuttle panel, this will give you access to two of the strut brace bolts, also remove the bolts on each strut top holding the strut brace on. These need an 'E20' socket.

b58tu b58 tuning williams performance hpfp

once the strut brace is removed you will see another plastic panel covering the engine sound deadening. This is held on by 7 x 10mm bolts. Remove these bolts and the hose which is attached, then pull the plastic trim out. You should then be left with the sound deadening like the pic below. This can now be pulled out.

b58tu b58 tuning williams performance hpfp

Once the sound deadening is out it will give you a better view and access to the HPFP. Firstly disconnect the electrical connector on the fuel pump, I would also remove the electrical connectors on the coil packs which have the fuel line running underneath them. 

b58tu b58 tuning williams performance hpfp

Now get an old towel and place it under the hose fittings either side of the fuel pump. Go slowly here as there will be some small pressure still in the fuel line. Use a 17mm spanner to very gently crack the fuel line fittings loose, this will release a very small amount of fuel. I would losen these till they are able to be turned with your fingers. Then go to the fittings on the fuel rail, all the pressure will no have been released so no need to worry about any fuel spray from these.

Once all nuts are loose, undo them completely and remove the hard line from hpfp to fuel rail completely. Put it somewhere clean and safe.

b58tu b58 tuning williams performance hpfp

With both fuel lines now disconnected from the pump, undo the torx bolts either side of the pump. Do not fully remove each bolt at a time, instead alternate a few turns on each bolt. The piston on the fuel pump is spring loaded so it will push itself up and out of cam cover as you remove the bolts.

b58tu b58 tuning williams performance hpfp

As you can see the electrical connectors on the pumps face opposite ways, this is why you need the wiring extension harness.

b58tu b58 tuning williams performance hpfp

Make sure all surfaces are clean and keep the cable out the way when refitting.

b58tu b58 tuning williams performance hpfp

Fitting the pump is simple, place it in position and fit each bolt finger tight. Then again, alternate tightening each bolt a few turns at a time to help bring the pump down straight. DO NOT TIGHTEN EACH BOLT FULLY. Torque spec for these bolts is 12NM.

b58tu b58 tuning williams performance hpfp

Once the pump is fitted and bolts torqued you can then refit the fuel line from pump to fuel rail. Fit all fittings finger tight first, then once ALL fittings are on you can tighten them up.

Next step is to fit your wiring extension for the fuel pump, make sure the wires are in a position so that they can't be damaged or kinked when the sound deadening is refitted. You can now also refit the plugs to the two coil packs you earlier disconneted.

b58tu b58 tuning williams performance hpfp

Now its time to refit all the sound deadening, plastic trims, strut brace etc in the reverse order you removed them.

RECONNECT BATTERY

b58tu b58 tuning williams performance hpfp

Refit engine cover and its time for BOOST!!!!!!

This job should only take your 30-60 minutes, depending how much you get side tracked or distracted.

There is no need for extra tuning for this fuel pump to operate, but custom tuning will see the best from this pump.

We can supply and fit both the fuel pump and wiring harness.

If your having a go yourself, feel free to email for any information on any part your not sure of or with any questions you have.

Thanks

Marc