UBP - Under Bonnet Pump - What it looks like inside - Page 4

COLVERT · 25th February 2012, 20:38

How are the armature and brushes sealed from the diesel or do they run immersed ?????

Very hard to see from the pictures. MORE MYSTERY LOL.

Colvert.

HarryM1BYT · 25th February 2012, 21:07

Quote:

Originally Posted by COLVERT

How are the armature and brushes sealed from the diesel or do they run immersed ?????

Very hard to see from the pictures. MORE MYSTERY LOL.

Colvert.

They run immersed in the diesel and the fuel cools the motor down.

craig8661 · 26th February 2012, 09:02

and there was me thinking of using a dodgy under bonnet pump to syphon petrol out of a scrap car knowing the motor is immersed in diesel it would not be good to immerse the motor in petrol lol

HarryM1BYT · 26th February 2012, 10:19

Quote:

Originally Posted by craig8661

and there was me thinking of using a dodgy under bonnet pump to syphon petrol out of a scrap car knowing the motor is immersed in diesel it would not be good to immerse the motor in petrol lol

Would you mind much if I came along to watch

rik007 · 27th February 2012, 14:33

Our of interest it put my UBP motor back together and taped it up to hold it together as it was out of the ali canister.

Hooked direct to the car battery it runs a treat. Brushes are probably half worn from a simple visual inspection. So, I suspect the fault may well be that the pump mechanism, it is perhaps the area that evenutally gets some wear and then the two worm drives may have a tendency to lock together.

Tap the pump and pehaps this gives them them a slight jolt allowing the motor to turn them again. The worm drives are metal on metal and even thought the diesel is the lunbricant, after 3000gallons (very roughly for a 100k car) may be this fault develops? Only conjecture though; as for me, detecting wear is pobably impossible given the realtively fine tollerance the manufactured parts?

Cheers,

Rich.

rovexCDTi · 27th February 2012, 19:40

All the more reason to use 2 stroke then..

Ive noticed my UBP is quieter since i stared using it.

Jules · 27th February 2012, 19:48

Unfortunately All the aftermarket UB pumps make far more noise than the OEM Pierburgh or BMW.

COLVERT · 29th February 2012, 10:38

Quote:

Originally Posted by HarryM1BYT

Would you mind much if I came along to watch

Harry, that's a good idea.

Perhaps we could sell tickets !!!

DerekS · 29th February 2012, 11:48

Jules .. I was hoping to see your pic of the deeply worn commutator, I suspect thats the whole problem with these pumps.

James.uk · 29th February 2012, 14:09

Bearing in mind they run in diesel oil, I imagine the screws are non ferrous, prob brass or copper alloy. And they are unlikely to be made of the same material. I.E. one is prob softer than the other. .

Clever lil system though innit...

...

26th February 2012, 09:02	#33
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	and there was me thinking of using a dodgy under bonnet pump to syphon petrol out of a scrap car knowing the motor is immersed in diesel it would not be good to immerse the motor in petrol lol __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

27th February 2012, 14:33	#35
rik007 Loves to post Rover 75 Tourer CDT 2002 Join Date: Aug 2011 Location: Cumbria Posts: 404 Thanks: 41 Thanked 7 Times in 7 Posts	Our of interest it put my UBP motor back together and taped it up to hold it together as it was out of the ali canister. Hooked direct to the car battery it runs a treat. Brushes are probably half worn from a simple visual inspection. So, I suspect the fault may well be that the pump mechanism, it is perhaps the area that evenutally gets some wear and then the two worm drives may have a tendency to lock together. Tap the pump and pehaps this gives them them a slight jolt allowing the motor to turn them again. The worm drives are metal on metal and even thought the diesel is the lunbricant, after 3000gallons (very roughly for a 100k car) may be this fault develops? Only conjecture though; as for me, detecting wear is pobably impossible given the realtively fine tollerance the manufactured parts? Cheers, Rich. Last edited by rik007; 28th February 2012 at 08:30.. Reason: spolling

27th February 2012, 19:40	#36
rovexCDTi This is my second home MG ZT+ 135 Join Date: Jan 2011 Location: Exeter Posts: 3,626 Thanks: 9 Thanked 42 Times in 26 Posts	All the more reason to use 2 stroke then.. Ive noticed my UBP is quieter since i stared using it. __________________ [SIGPIC][/SIGPIC]

27th February 2012, 19:48	#37
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	Unfortunately All the aftermarket UB pumps make far more noise than the OEM Pierburgh or BMW. __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

25th February 2012, 20:38	#31
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	How are the armature and brushes sealed from the diesel or do they run immersed ????? Very hard to see from the pictures. MORE MYSTERY LOL. Colvert.

29th February 2012, 11:48	#39
DerekS Posted a thing or two Rover 75 Tourer Join Date: Nov 2006 Location: Malpas Posts: 1,526 Thanks: 34 Thanked 118 Times in 89 Posts	Jules .. I was hoping to see your pic of the deeply worn commutator, I suspect thats the whole problem with these pumps.

29th February 2012, 14:09	#40
James.uk Passed Away 2002 Pale Blue. Rover 75 CDTi Connoisseur auto. 170K miles Join Date: Dec 2008 Location: Near the M67. Posts: 14,509 Thanks: 199 Thanked 585 Times in 397 Posts	Bearing in mind they run in diesel oil, I imagine the screws are non ferrous, prob brass or copper alloy. And they are unlikely to be made of the same material. I.E. one is prob softer than the other. . Clever lil system though innit... ...