2H Injector Pump - Diaphragm replacement and spring problems?

[lostmarbles]

I need to clear up something for Tom. The use of vaseline and vacuum pump oil was something I found on line, not anything I had done. I'm just interested in learning what should be used since I now have the Nissan SD22 motor, which appears to have the same basic IP operation as some of the Toyota diesels.

I spent a bit of time this afternoon/evening doing more searching on line for info about what lubricant to use on the leather diaphragm. I found the posts from the person who used vaseline and vacuum pump oil, and at four years later he reported no adverse effects at that point, though that was three years ago at this time. On that same thread another person reported over six years of problem free service with the use of "clear" power steering fluid. A third person chimed in with info from a book--" "How to Convert Your Car, Van, or Pickup to Diesel" By Paul Dempsey ISBN 0-8306-8968-0 Tab Books # 968 first printing April 78 third print April 80". The author recommended Neats Foot Oil, and the person posting said he had been using Neats Foot Oil at that time for several years successfully, but didn't state the actual number of years. I just wish that I knew the current status of the diaphragm for each person posting.

During this foray into the past I found a copy of a Nissan service book that someone had scanned and posted on line. In it I actually read where Nissan recommended cod liver oil. Yet, I also read a thread by someone else who had used food grade cod liver oil and had posted pictures of the problems caused by the cod liver oil application. Even the manufacturers can be wrong!

Just wanted to update this thread with more info that I found. At this point Neats Foot Oil seems to be ahead in longevity for the leather diaphragm.

Don

Sorry... My speed-reading often gets me in the poo Don...

I've edited my earlier post.

Odd that an early piece of Nissan literature mentions cod liver oil. But then I used to write technical literature for a living so I do know a bit about errors and misinformation slipping through (despite editor-checks and proof-reading)..

 

[duncanrm]

Bugger it at $40 I'm just going to change my diaphragm every 4 years

 

[handcannon]

Bugger it at $40 I'm just going to change my diaphragm every 4 years

That's OK to say when you know for sure they are easily available. So far I've only found a possible cross over to an older Mercedes part. And that reference is about three years old.

Don

 

[duncanrm]

That's OK to say when you know for sure they are easily available. So far I've only found a possible cross over to an older Mercedes part. And that reference is about three years old.

Don

Hi Don,

They're available over the counter here in Australia from Terrain Tamer dealers. I bought two about a year ago.

http://www.terraintamer.com/en/

Also Denso part number: 090580-0041

 

[traveldud]

Do you still have your part number for the diaphragm? Thanks!

 

[duncanrm]

Denso part number: 090580-0041

 

[handcannon]

Do you know approximately how much the diaphragm cost? I have a special configuration tee ordered, since they weren't available locally, 1/8 male bspt X 1/8 npt female X 1/8 bspt female. As soon as that arrives I will be able to hook up the mechanical pressure gauge and check oil pressure on the motor, and then I will be able to start putting that motor into the 73 Datsun. After all that work I want a spare diaphragm since I have no knowledge on the condition of the one currently in the IP. The motor has been setting, without being run, at least three years going by what the person that I got the motor from said. I don't know anything about the motor prior to that.

Don

 

[lostmarbles]

Do you know approximately how much the diaphragm cost? ..
Don

Not the cheapest price Don.... but one that I just plucked off eBay a minute ago (from a seller in the UK):

 

[handcannon]

Thanks Tom and Duncan, your help is much appreciated.

Does that Denso part number, 090580-0041 for a Toyota, crossover to a Nissan SD22? I haven't been able to confirm anything yet.

I've been doing more online searching and I'm confused (nothing new). I've was given the name, Oregon Fuel Injection, which just happens to be about 45 miles away from me.

I called them and they found three diaphragms on the east coast USA, Zexel #155020-7920, for a Nissan SD22. I also found a chart that gives both the Zexel # I got from Oregon Fuel Injection, and the Denso # that you both gave me. The chart does not state that it is a crossover chart, I'm just assuming it is. Can either one of you confirm that the # you gave does crossover to the Zexel #?

I did find that the Mercedes Benz diaphragm for at least the 220D MAY crossover (not sure of part number):
All models listed below 1963-1989
0309D 67-74
0319D 63-65
140TD 76-85
190DC 61-65
200D 65-85
207D 77-85
220D 68-79
240D 73-85
307D 77-85
L206D & DG 71-77
L306D & DG 71-77
L405 63-65
L406DG 67-74
L407D 75-82
MB100 87-89

OM615, OM616, OM621 & OM636 Engines

Don

 

[duncanrm]

Thanks Tom and Duncan, your help is much appreciated.

Does that Denso part number, 090580-0041 for a Toyota, crossover to a Nissan SD22? I haven't been able to confirm anything yet.

Uncle Google says the Denso part number for the Nissan SD22 is actually 090580-0031.. very similar perhaps. But not the same part number.

http://nissandiesel.dyndns.org/viewtopic.php?t=183&start=30

I see some photos of the Nissan diaphragm here with measurements:

http://nissandiesel.dyndns.org/viewtopic.php?t=183&start=45

I will check the measurements and do a visual comparison against those photos tonight.

I'm happy to buy a 2H one here locally (Adelaide, South Australia) and ship over to you if you run into a brickwall.

 

[handcannon]

Thanks duncan for your help! That forum in your first link is where I previously found the Denso 090580-0031 and the 090580-0041 numbers. The 0031 # was listed as for the SD22, and the 0041 # was in a chart on pg5 of that thread. That chart wasn't listed as a crossover chart, but I was questioning if it was meant to be. I did find that same chart on a company web site (don't remember company name) and it was not clear there either if it was a crossover chart.

I did find a diaphragm for the SD22 yesterday. It was on the East Coast USA, and I'm on the West Coast so it will have to be shipped. Last night I was able to confirm oil pressure, 47-48 pounds cold and 42-43 pounds after 10 minutes idling so I ordered it this morning. It was $36.10 US plus shipping. The number is Zexel 155020-7920.

Getting pics and measurements would be great just to know if it will interchange for future reference.

Don

 

[Bill W]

I also have problems with a smoky 2H. especially under load. and suspect a faulty diaphragm (item 22303 in the diagram on the earlier post) I have had the cover off several times and cannot see a problem but there is engine oil on the back side (away from the IP) of the diaphragm. I think the only way that can get there is through the diaphragm???? I cannot however see how to actually remove the diaphragm. It seems to be securely attached to something on the IP side.
Advice on removal??
Thanks.
Bill.

 

[duncanrm]

Hi Bill,

I wrote a short guide on how to change the diaphragm here with lots of photos..

2H Diaphragm replacment

Oil is normal in that part of the housing it comes from the vacuum tubes up at the intake - from engine blowby. There's a small drain bolt on the side of the pump that should be used to periodically drain the governor housing.

It should also be noted that generally when a Diagphragm fails your 2H is VERY smoky and doesnt drop back to idle quickly. If your 2H is just generally smoky, I wouldn't be looking at the diaphragm first - but rather injectors, air cleaner and a check that your fuel hasn't been inappropriately wound up at some point.

 

[Bill W]

Hi Bill,

I wrote a short guide on how to change the diaphragm here with lots of photos..

2H Diaphragm replacment

Oil is normal in that part of the housing it comes from the vacuum tubes up at the intake - from engine blowby. There's a small drain bolt on the side of the pump that should be used to periodically drain the governor housing.

It should also be noted that generally when a Diagphragm fails your 2H is VERY smoky and doesnt drop back to idle quickly. If your 2H is just generally smoky, I wouldn't be looking at the diaphragm first - but rather injectors, air cleaner and a check that your fuel hasn't been inappropriately wound up at some point.

Thank you for the reply Duncan. I'll have a look at your short guide. I have had the injectors checked. It is VERY smoky...black and diesel smelling! Plus I can remove the front vacuum hose from the manifold and it is actually a little less smoky. So, that makes me think that the diaphragm is not operating correctly.
Thanks again.
Bill.

 

[raistlin119]

Apologies for dredging up an old thread. Im having an issue with my governor as you can see from the pic below. I just got it back from the mechanic as Ive had the fuel adjusted and the turbo checked, now oil is pissing out of the governor. Should I just drain the oil and replace the diaphragm or is there something more serious ?

 

[Tapage]

Should I just drain the oil and replace the diaphragm or is there something more serious ?

that would be my 2 first steps for sure .. ( also cleaning the area )

 

[duncanrm]

Apologies for dredging up an old thread. Im having an issue with my governor as you can see from the pic below. I just got it back from the mechanic as Ive had the fuel adjusted and the turbo checked, now oil is pissing out of the governor. Should I just drain the oil and replace the diaphragm or is there something more serious ?

Is this a newly turbo'ed engine? Has the crankcase breather hose from the top of the rocker cover been re-rerouted to a pre-turbo position?

 

[raistlin119]

Is this a newly turbo'ed engine? Has the crankcase breather hose from the top of the rocker cover been re-rerouted to a pre-turbo position?

Thank you for the reply.

Yes, recently turbo'd, had it checked (10psi) , dyno'd ,fuel adjusted and egt/boost gauge installed and this is what it looked like when I got it home.

 

[duncanrm]

Thank you for the reply.

Yes, recently turbo'd, had it checked (10psi) , dyno'd ,fuel adjusted and egt/boost gauge installed and this is what it looked like when I got it home.

Has the crankcase breather hose been re-routed to a pre-turbo intake position?

 

[raistlin119]

Has the crankcase breather hose been re-routed to a pre-turbo intake position?

hi, yes I just went out and checked the throttle body has has been capped and the crankcase breather is piped into the cold air intake between the filter and the turbo.