Jump to content

BMC 1.5 Oil with a lot of fuel in it.


mtbvincent

Featured Posts

A friend told me to go out and spend an hour or more on the water so the engine en exhaust can dispose of the build up dirt from all my cold starts' en messing around in the harbor.

Even try a bit of cleaning fluid in the raw water intake when the engine is hot.
 
As you know, my fuel pump setting is kind of a mystery for me.
Turn it left, right, or just leave it on the mark?
Can someone help me out, is there a basic setting I need to find after replacing the pump. 
 
 
Link to comment
Share on other sites

Yes there is but to do it you need a special timing gauge and access to the timing marks or way of finding top dead center and perhaps counting flywheel teeth. I doubt you or anyone you know will have the gauge so I fear it is just trial and error.

 

If you have no yet given the engine a good long hard thrash I would suggest I am not surprised it is still smocking. I am with your  friend.

Edited by Tony Brooks
Link to comment
Share on other sites

  • 4 weeks later...

The engine til runs like *^% contact with the person ho has rebuilt the pump, and he wanted it back for a check.

He took everything apart and the main shaft inside the pump has a crooked tooth.
It is a thick tooth sow we think this may have gone wrong on the test bench.
So another one went in, and the pump is ready to be fitted again.
The idea is to get the rebuild specialist to mount and adjust and set the pump on my boat..
Only he is a busy man lives 2 hours away, but hopefully he can make time on a short notice.
 
   
image.jpeg.e39e18569141985f5bdfc9ee046cb29c.jpeg
  • Greenie 2
Link to comment
Share on other sites

It's a beautiful day guys! 

The engine finally runs like a new one!
The fuel pump has been refurbished again.... and the main shaft has been replaced. 
Apparently this was the problem, not a 100 sure but ok it works finally!
So happy i can enjoy my boat again 🥰
I want to thank you guys for all the advice and helpful ideas.
It's been much appreciated and i am thankful for your time.
Here is a video of the engine running 
With kind regards, 
Vincent
   
  • Greenie 2
Link to comment
Share on other sites

Thanks for the feedback and pleased it is sorted. So after all that it was a timing problem, not the pump to the engine but the rotor to the drive shaft. Without that master spline the drive shaft would fit into the guts of the pump in a number of different positions which would put injection timing so far out it would be beyond the pump adjustment.

Link to comment
Share on other sites

Good to hear all is well, and as regards the dipstick that rebuilt the pump. "Next time Specsavers"!!

On 29/03/2022 at 21:49, TNLI said:

I'm not saying what the smoke is, as you can get light grey smoke from burning oil or whitish smoke from head gasket failures. I had an injection pump for a Yanmar seize, and the smoke was black. I just sniff it, and then it's obvious if it is oil or fuel. 

  This article is a good one as regards smoke and it does list incorrect injection timing under no 3, the continuous light white smoke.

The 3 Causes of White Smoke From A Diesel And What To Do Next – Learn Diesels

 

OK, so wild guess, the injection timing is off, as it's rare for a professional company to fork up an injection pump rebuild. If an amateur using the special tools required to service a high pressure pump bought from a scrap yard, then yes that could also cause some real nasty white or even light grey smoke.

  • Incorrect injection timing (Worn timing gear or damaged crankshaft keyway).

Looks like my guess of dodgy injection timing was correct, although I'm surprised it was the pump itself. 

Link to comment
Share on other sites

I thought you would be better off taking the pump back to the specialist. Seems it was right and he solved the problem. 

I have never seen a shaft twisted like that and I cannot imagine how it could happen.

 

Glad it is now OK.

Link to comment
Share on other sites

By coincidence a diesel specialist stops by at my work just now. 

So I asked him to take a look at the picture of the shaft and his thoughts.
He said this was a 100% the problem. 
The twisted shaft / tooth combination resulted, for example, 3 degrees on the shaft is 1.5 cm or more on the pump housing.
I am still seriously happy with the rebuild specialist, sh#%@ happens, and I am just glad it runs so well right now 😍
 
 
 
  • Greenie 1
Link to comment
Share on other sites

11 hours ago, mtbvincent said:

By coincidence a diesel specialist stops by at my work just now. 

So I asked him to take a look at the picture of the shaft and his thoughts.
He said this was a 100% the problem. 
The twisted shaft / tooth combination resulted, for example, 3 degrees on the shaft is 1.5 cm or more on the pump housing.
I am still seriously happy with the rebuild specialist, sh#%@ happens, and I am just glad it runs so well right now 😍
 
Can't figure out why you are seriously happy with a rebuild specialist that forks up a rebuild, or the friend who suggested the smoke would disappear if you just motored around for a few hours. That pump could have damaged its connection to the crank shaft, (The pinion drive), given enough time to wear the opposite teeth out.
 
Love the sound of your BMC in the clip and good to see it's running smoke free, although you could use a fender sock. Just make one from an old dark jumper or trouser leg.
 
 
 

 

Edited by TNLI
Link to comment
Share on other sites

  • 11 months later...
On 20/05/2022 at 14:19, mtbvincent said:

By coincidence a diesel specialist stops by at my work just now. 

So I asked him to take a look at the picture of the shaft and his thoughts.
He said this was a 100% the problem. 
The twisted shaft / tooth combination resulted, for example, 3 degrees on the shaft is 1.5 cm or more on the pump housing.
I am still seriously happy with the rebuild specialist, sh#%@ happens, and I am just glad it runs so well right now 😍
 
 
 

Did he have an answer as to how it may of happened though?  Never seen one twist like that.

On 21/05/2022 at 01:49, TNLI said:

 

Its OK. he had magic oil in the engine, Liquid Moley or some such.

Link to comment
Share on other sites

  • 1 month later...

We have had the fuel diltion problem for a few years now and its being a mystery. Currently though We have stopped it by turning off the fuel when the boats lying idle

 

What was happeing is, the fuel in the fuel tank can be higher than the engine and syphon effect takes over finding a slight gap in the fuel pump shaft and drips into the sump.

 

The seal needs to be done on the pump at some stage, but for the moment delighted to have arrested the problem. I wont take credit for fixing it either myself.

 

We had been through the mill, replacing the lift pump seal, injection pump and injectors. All which helped a little but didnt stop it.

Link to comment
Share on other sites

Thank you, this really helps. I do not have the problem during summer season, when the engine is regularly running, but especially after the winter stop. I intended to close the main valve from tank to engine this winter and your post confirms what I suspected, diesel oil slowly seeping into the sump during stand still.

Link to comment
Share on other sites

I had a small fuel dilution in my truck with a DPA hydraulic pump for a long time .......one day it was idling outside my shed ,and I see a pool under the motor....it was diesel coming out of the dipstick...........,fortunately I have many pumps for Perkins ,so I fit a spare DPA pump.....replacing the seals on the drive shaft is well documented here ,and can be done by anyone who can do mechanical work...........anyhoo,the point of the story ,is the seals will suddenly fail completely after leaking a slightly for ages.

Link to comment
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.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.