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Old 18-09-2013, 19:43   #16
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Thx ya'll

I almost have the pump out. I am lucky that I have good access to both dudes if the motor.

I have 2 Q.

1)What is the size of the Allen bolt on the inside of the pump?

2) I have read that it helps to mark the position of the pump as it homes out so that it will be easier to time when i out it back in. Can you tell me what I am looking for and how to mark it?

Thanks?

Dave
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Old 18-09-2013, 19:51   #17
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Redcoat, thx. I observed all fuel line connections and they are now dry. it appears the leak is coming from the bottom back of the pump. You mention that the rear pressure line could be the leak. I did reach under with a wrench and could get no movement on the fuel fitting . The pressure line connection is good.

Not sure why I need to remove the. Jabsco pump. Since i have good access to the left side of the engine it appears I will be able to pull the pump without removing the heat exchanger ss well. Thx for your thoughts.

Dave
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Old 18-09-2013, 19:53   #18
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Re: 4-108 Fuel leak between govenor and high pressure fuel pump. Sitka

Did you try the fuel nut going into the pump. On the front edge there is a factory mark. A line one on the pump one on the block. If you have not touched the water pump good reinstalling the injection pump will be easy as it is keyed and only goes in one way. The allen is like 5/16 or metric equivalent find a long extension
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Old 18-09-2013, 19:54   #19
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Thx Don. I will call oregon fuel injection In the morning. Looks like their prices are good
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Old 18-09-2013, 20:28   #20
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Quote:
Originally Posted by Redcoat View Post
Did you try the fuel nut going into the pump. On the front edge there is a factory mark. A line one on the pump one on the block. If you have not touched the water pump good reinstalling the injection pump will be easy as it is keyed and only goes in one way. The allen is like 5/16 or metric equivalent find a long extension
Redcoat, yup tried the fuel nut.

Understand that when I pull the pump I will see a factory mark. (Shall I note the position of the Axel when it comes out relative to the factory mark?)

I have marked the block and the pump... Not sure why as it seems impossible for it to be installed any other way.
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Old 18-09-2013, 22:12   #21
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Re: 4-108 Fuel leak between govenor and high pressure fuel pump. Sitka

No there is a flat spline. The Cav pump will only go in one way and unless you mess with the 4 bolts that are outside the jabsco raw water pump. I am not sure of a pump service but if you have never rebuilt your injectors now would be a good time. They should be about 50 bucks apiece.
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Old 18-09-2013, 23:12   #22
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Re: 4-108 Fuel leak between govenor and high pressure fuel pump. Sitka

It is a common problem with the CAV injection pump leaking from the seal at the front of the pump even on car engines. If it's bad enough it has been known to fill the sump with diesel. You must mark the pump to housing as the pump holes are slotted. I use a small cold chisel. On some applications they used set screws to secure the pump. There was a special spanner available but I changed the inside bolt for a cap screw.

John
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Old 19-09-2013, 03:38   #23
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Re: 4-108 Fuel leak between govenor and high pressure fuel pump. Sitka

When I had a leakon 4.108 pump it was a glued seal holding on the governor. i didnt know it was glued and the whole thing popped off when I tried to tighten it. I was offshore and fixed with jb weld and its been holding for years.
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Old 19-09-2013, 05:23   #24
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Re: 4-108 Fuel leak between govenor and high pressure fuel pump. Sitka

JB weld what wonderful stuff! Before we rebuilt the guy who did the work laugh at all of it on my engine.
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Old 19-09-2013, 09:53   #25
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Talked to the gents at oREGON fuel injection (541-485-1434) . They were great in the phone and offered me thus link. $725 to rebuild the pump .


http://oregonfuelinjection.com/pdf/d...structions.pdf
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Old 19-09-2013, 10:09   #26
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Thea are screen shots from their site
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Old 19-09-2013, 17:04   #27
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Here are some pics. Notice the shot of the buried Allen head bolt 7/32nd
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