1800: 1972 pv1800es

[Othen]

Originally Posted by cassell

The fuel pump should be mounted to it's plate with rubber mountings (BL Mini exhaust bobbins are ideal), if it has ever been simply bolted to the mounting bracket the noise is very noticeable and is a common mistake made by many, in fact my own ES had been fitted with a genuine new Bosch pump over 20 years ago and it drove me mad until I remounted it with Mini bobbins!

The fuel pump seems to be secured with a single U bolt, via some flexible packing:



... everything looks like it is fitted the way it is supposed to be; I can't see where exhaust bobbins would fit in this set up:



... and from the other side:



Does this all look correct? I think the electric motor is just a bit noisy - but then perhaps it is 50 years old?

Alan

[Laird Scooby]

The rubber packing round the pump has probably gone hard as well Alan turning the panel it's mounted into a sounding board. That would make it louder!

[Othen]

Originally Posted by Laird Scooby

The rubber packing round the pump has probably gone hard as well Alan turning the panel it's mounted into a sounding board. That would make it louder!

Do you think just changing the rubber packing might solve it Dave?

Alan

[Laird Scooby]

Originally Posted by Othen

Do you think just changing the rubber packing might solve it Dave?

Alan

It may well do Alan, my knowledge of NVH isn't great but it's surprising how much vibration can travel through dried out rubber. I'd guess it needs to be fairly firm rubber to hold it in place so i'd suggest going to Volvo for it or at least a Volvo specialist that knows it's not just a piece of any old rubber.

[Othen]

Originally Posted by Laird Scooby

It may well do Alan, my knowledge of NVH isn't great but it's surprising how much vibration can travel through dried out rubber. I'd guess it needs to be fairly firm rubber to hold it in place so i'd suggest going to Volvo for it or at least a Volvo specialist that knows it's not just a piece of any old rubber.

I was hoping cassell would tell me whether the current set up looked pukka or not Dave.

[Laird Scooby]

Originally Posted by Othen

I was hoping cassell would tell me whether the current set up looked pukka or not Dave.

Go to Pg79 of this :

https://weblisher.textalk.se/gcp/201...0&noConflict=1

Look in the bottom RH quarter of the image and you will see the fuel pump is mounted in something similar to a coil clip mount and supported by a pair of resiliant mounts, similar to Mini exhaust bobbins.

If you go down that route and buy Mini exhaust bobbins or similar resilient mounts, ensure the correct nuts come with them. I know (from experience!) that the Mini ones are an oddball thread (5/16 UNF from memory) so i suspect at some point the centrl screw in the coil clip type bracket has rusted to nothing and been replaced with the exhaust "U" clamp and rubber.

Others have already mentioned the Mini exhaust bobbins so i would suspect that is the original (and best) method of mounting.

[Othen]

Originally Posted by Laird Scooby

Go to Pg79 of this :

https://weblisher.textalk.se/gcp/201...0&noConflict=1

Look in the bottom RH quarter of the image and you will see the fuel pump is mounted in something similar to a coil clip mount and supported by a pair of resiliant mounts, similar to Mini exhaust bobbins.

If you go down that route and buy Mini exhaust bobbins or similar resilient mounts, ensure the correct nuts come with them. I know (from experience!) that the Mini ones are an oddball thread (5/16 UNF from memory) so i suspect at some point the centrl screw in the coil clip type bracket has rusted to nothing and been replaced with the exhaust "U" clamp and rubber.

Others have already mentioned the Mini exhaust bobbins so i would suspect that is the original (and best) method of mounting.

I couldn’t find the right page in the IPL Dave, but no matter. I’m wondering whether either a non-standard pump or bracket (or both) has been fitted sometime during the past 48 years?

[c1800]

Here is the picture of the factory mounting assembly. The large plate is bolted to the body, and the clamp around the pump is mounted to the plate with two bobbins.

[Laird Scooby]

Originally Posted by Othen

I couldn’t find the right page in the IPL Dave, but no matter. I’m wondering whether either a non-standard pump or bracket (or both) has been fitted sometime during the past 48 years?

There's a box in the bottom centre of the page Alan, you move your cursor there, click, delete the existing number and type in the new one followed by "Enter".

No matter, our Canadian friend has furnished the image - thanks for that :



As you can see, pretty much as i described it. Looking at it, i suspect you've either had a replacement pump at some point or someone has broken the coil-clip type bracket and/or screw in it and used an exhaust "U" bracket as an alternative method with the rubber as a precaution against crushing the pump and also to pack the pump diameter out to match the ID of the "U" clamp. The "U" clamp would have been chosen to match the pitch of the bobbins which also may have failed, perhaps due to a fuel leak way back in the mists of time.

The way i see it you have 3 choices, first live with it being a bit more vocal than you'd expect. Second is to measure the ID of the "U" clamp and the OD of the pump, get a piece of neoprene sheet whose thickness is half of the difference between the two sizes and fit that in place of the existing rubber or thirdly, find some bobbin resilient mounts suitable, the correct coil-clip type bracket and putit back as Mr Volvo intended.

My vote would be for the last one.

[Othen]

Originally Posted by c1800

Here is the picture of the factory mounting assembly. The large plate is bolted to the body, and the clamp around the pump is mounted to the plate with two bobbins.

Many thanks - I see how it fits now. It looks like the mounting bracket is non-standard.
Alan