Canal World

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more!

This message will be removed once you have signed in.

routrax

Diesel Leak from Fuel Pump BMC 1.5

16 posts in this topic

Hi,

I've got a diesel leak coming from the plate that the return pipe comes from (see pic)

Diesel_Leak.jpg

Initially I thought is was the return pipe itself so replaced that but is seems the leak is coming from the the gasket between the plate on the pump and the plate itself. There is a small amount of the rubber gasket poking out where the leak is and I'm guessing this this is probably the cause.

My concern is that the bolts holding this plate are wired in and have what looks like a security tag crimped on.

 

Should I just cut the wire and replace the gasket or is this a specialist job?

The pump was new just over a year ago when I had the engine rebuilt.

 

Any help appreciated.

Thanks

Steve

0

Share this post


Link to post
Share on other sites

Hi,

I've got a diesel leak coming from the plate that the return pipe comes from (see pic)

Diesel_Leak.jpg

Initially I thought is was the return pipe itself so replaced that but is seems the leak is coming from the the gasket between the plate on the pump and the plate itself. There is a small amount of the rubber gasket poking out where the leak is and I'm guessing this this is probably the cause.

My concern is that the bolts holding this plate are wired in and have what looks like a security tag crimped on.

 

Should I just cut the wire and replace the gasket or is this a specialist job?

The pump was new just over a year ago when I had the engine rebuilt.

 

Any help appreciated.

Thanks

Steve

Hi Steve, the bolts appear to be wire locked. Just cut the wire,replace the gasket and re lock with soft iron wire. Not a specialist job. If you PM me I'll send you some stainless aircraft locking wire if your stuck.

0

Share this post


Link to post
Share on other sites

Thanks Flyboy,

I'll try to have a look tomorrow evening weather permitting!

I should be able to get some lockwire in a local toolshop, but if I have trouble I'll PM you.

The gasket appears to be rubber, would you think it'd be ok to make one or would it be best to source an original part?

 

Sorry for all the questions, it's just that I know nothing about injector pumps!

 

Thanks again

Steve

0

Share this post


Link to post
Share on other sites

Thanks Flyboy,

I'll try to have a look tomorrow evening weather permitting!

I should be able to get some lockwire in a local toolshop, but if I have trouble I'll PM you.

The gasket appears to be rubber, would you think it'd be ok to make one or would it be best to source an original part?

 

Sorry for all the questions, it's just that I know nothing about injector pumps!

 

Thanks again

Steve

 

 

Hi Steve, I would source an original part if I were you. Try Calcutt boats or RCR, they should have spares.

 

Regards Ian

0

Share this post


Link to post
Share on other sites

Hi Steve, I would source an original part if I were you. Try Calcutt boats or RCR, they should have spares.

 

Regards Ian

 

Or any Fuel injection company - most major towns have one. Ask at a local garage or where they maintain trucks for contact details. It is just a straight forward hydraulically governed CAV DPA pump and things like gaskets will be fairly standard across the range.

 

I am almost sure that is just a plate with nothing below it that will jump out at you so as long as you avoid dropping any dirt, paint flakes etc. down the hole all will be straight forward.

0

Share this post


Link to post
Share on other sites

I am almost sure that is just a plate with nothing below it that will jump out at you so as long as you avoid dropping any dirt, paint flakes etc. down the hole all will be straight forward.

 

Thanks Flyboy and Tony, It was the bits jumping out that worried me the most!

I'll hunt for a a gasket tomorrow. Do you know of anywhere that would stock them to save me the usual daft question and answer scenario!

Thanks

Steve.

Edited by routrax
0

Share this post


Link to post
Share on other sites

How could you tell there was a diesel leak with all that oil and crude around everything ??

0

Share this post


Link to post
Share on other sites

I've got a diesel leak coming from the plate that the return pipe comes from ...

Initially I thought is was the return pipe itself so replaced that but is seems the leak is coming from the the gasket between the plate on the pump and the plate itself. There is a small amount of the rubber gasket poking out where the leak is and I'm guessing this this is probably the cause.

My concern is that the bolts holding this plate are wired in and have what looks like a security tag crimped on.

It is difficult to see from the photo, but is this not the feed pipe?

The way the pipe feeds in from the filter to the pump, means it is exposed to a fair amount of vibration, which either tends to fracture the pipe itself or crack the joint on the pump. The resultant fuel leak can spread fuel in almost any direction and make it appear to be coming from somewhere else.

If you are talking about the the pmump mounting to the block, make sure you check the poisiton when you remove it, as this could affect the timing.

There may be an adjusting plate cover which has a gasket, in which case this is less crucial as the nuts are wired simply to show no alteration to the adjustment has taken place.

0

Share this post


Link to post
Share on other sites

It is difficult to see from the photo, but is this not the feed pipe?

The way the pipe feeds in from the filter to the pump, means it is exposed to a fair amount of vibration, which either tends to fracture the pipe itself or crack the joint on the pump. The resultant fuel leak can spread fuel in almost any direction and make it appear to be coming from somewhere else.

If you are talking about the the pmump mounting to the block, make sure you check the poisiton when you remove it, as this could affect the timing.

There may be an adjusting plate cover which has a gasket, in which case this is less crucial as the nuts are wired simply to show no alteration to the adjustment has taken place.

 

 

No, its the return pipe. The feed pipe on a DPA is on the other end by the transfer pump.

 

Th photo makes me thing the olive on that pipe may be crushed and leaking because the "nut" looks as if it may be tightened hard onto the threaded boss on the plate.

0

Share this post


Link to post
Share on other sites

How could you tell there was a diesel leak with all that oil and crude around everything ??

Hi Micky, It was the small jet of diesel shooting out from the area marked 'leak' on the picture that gave me the clue. Most of the dirt is due to the area being covered in diesel. I will be giving it a good clean before I remove any parts though!

 

It is difficult to see from the photo, but is this not the feed pipe?

The way the pipe feeds in from the filter to the pump, means it is exposed to a fair amount of vibration, which either tends to fracture the pipe itself or crack the joint on the pump. The resultant fuel leak can spread fuel in almost any direction and make it appear to be coming from somewhere else.

If you are talking about the the pmump mounting to the block, make sure you check the poisiton when you remove it, as this could affect the timing.

There may be an adjusting plate cover which has a gasket, in which case this is less crucial as the nuts are wired simply to show no alteration to the adjustment has taken place.

 

It's definitely the return pipe, but this is not leaking, I replaced the pipe and olives a month or so ago as I thought his was the cause. I don't think I will need to remove the pump to replace the gasket.

 

No, its the return pipe. The feed pipe on a DPA is on the other end by the transfer pump.

 

Th photo makes me thing the olive on that pipe may be crushed and leaking because the "nut" looks as if it may be tightened hard onto the threaded boss on the plate.

 

It's not the olive Tony, I've already done this a few times, which is why the nut looks a bit ragged. This will get replaced along with the gasket as it's a bugger to get to!

0

Share this post


Link to post
Share on other sites

Well new gaskets (there are 2 types, cork and rubber) and a new return pipe and fittings on the way from Calcutt Boats. Here's hoping that all my diesel ends up in the engine and not in the engine bilge!

 

Thanks for all the help guys.

 

Steve

0

Share this post


Link to post
Share on other sites

Have followed this thread with interest as I also have a leak from my BMC 1.5 fuel pump and would really value any advice/info before tackiling it. The leak is coming from the engine stop arm .... does anyone know if there is a gasket or seal in there ... and if there are any bits liable to jump out when we go in there .......

 

 

cheers,

bunny

Edited by HappyBunny
0

Share this post


Link to post
Share on other sites

Have followed this thread with interest as I also have a leak from my BMC 1.5 fuel pump and would really value any advice/info before tackiling it. The leak is coming from the engine stop arm .... does anyone know if there is a gasket or seal in there ... and if there are any bits liable to jump out when we go in there .......

 

 

cheers,

bunny

 

 

I think that it is sealed by an O ring in the shaft within the turret that also houses the governor. I am sure the turret will require removing (and hence the governor) with the governor piston and valve hanging down below it. Once you undo the two? securing screws (maybe lock-wired) the whole assembly will just lift off. Form then on it gets a bit more complicated because there are several different models of pumps fitted to 1.5s.

 

I can not in all honesty encourage you to try this yourself unless you are used to working with diesel injection equipment. Cleanliness is all and you may have an idle damper to reset.

 

Make sure the pointer on the triangular plate the pump bolts onto is aligned with the line scribed on the pump flange and then remove the pump and take it to a specialist for overhaul. All you need to do to time it when you refit it is align the scribed line and pointer. The drive has a master spline.

 

I suspect we will be seeing more of this. I forecast some time ago that the loss of sulphur in the fuel would allow seal to shrink back to their original size but because they are now worn would start to leak. Just replacing the one O ring is likely to be a temporary cure because another seal may well start leaking soon.

 

Please ensure that you instruct whoever overhauls the pump that you want new seals fitted that are compatible with the new fuel.

0

Share this post


Link to post
Share on other sites

I think that it is sealed by an O ring in the shaft within the turret that also houses the governor. I am sure the turret will require removing (and hence the governor) with the governor piston and valve hanging down below it. Once you undo the two? securing screws (maybe lock-wired) the whole assembly will just lift off. Form then on it gets a bit more complicated because there are several different models of pumps fitted to 1.5s.

 

I can not in all honesty encourage you to try this yourself unless you are used to working with diesel injection equipment. Cleanliness is all and you may have an idle damper to reset.

There is a seal behind the operating arm, but I have never taken this off, so not sure whether you can simply remove the lever to get at it!

0

Share this post


Link to post
Share on other sites

There is a seal behind the operating arm, but I have never taken this off, so not sure whether you can simply remove the lever to get at it!

 

That is what I am tying to remember. I have a feeling that either a small screw is withdrawn that retains the shaft in a groove or the shaft is retained by the governor assembly. However as there have been are several different designs over the years we can only speculate unless we know exactly which pump the OP has.

0

Share this post


Link to post
Share on other sites

hmmm thanks for those comments .... I shall proceed with due caution and assistance .....

:cheers:

bunny

0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.