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  #1  
Old 01-20-2005, 11:05 AM
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Question injection pump calibration

is the injection pump calibtates for a specific car? or is it just calibrated for it's own need?

Basically what I'm asking is...can I remove an IP from a good running engine and install it on another engine without recalibrating the pump?

Both are 617 turbos.

I have a running parts car and was curious about this. If say I wanted to trouble shoot a problem by swapping parts, can I just swap IPs and see what happens?

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Old 01-20-2005, 12:27 PM
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I'll bite

I think the consensus is, in short- Yes.

In long, you need to verify a few things:

-Timing chain, acceptable "stretch" (there should be few pags in the manual on how to check timing chain stretch
- IP start of delivery- this is the only "timing" you can do to an OM617 pump. Make sure this is good before starting the car.

Other than that, the thing should run fine. I assume that you are *sure* your current IP is not working properly.

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Old 01-20-2005, 01:55 PM
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So the calibation should be already set, essentially for the life of the IP.

The "start of fuel delivery" timing would have to be set for each individual engine the IP is bolted to.

Sounds like a go then.

But I'm just asking out of curiosity now, the future might be anything.

As far as the timing chain stretch...I assume the IP would need to be re-timed every few years over the life of the engine.
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1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
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  #4  
Old 01-20-2005, 07:09 PM
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Not sure.

From what I've gotten out of my reading here...

As the timing chain "stretches" (it doesnt really stretch, but the term is close and now very colloquial) it will affect IP timing...but not enough to cause concern- IE- if you just replace the timing chain when it needs it (5 degrees of stretch ? not sure...), then the IP timing will always be "close enough".

A few guys here have experimented with advanceing the IP timing or otherwise playing with it (something about a shim or key), you'll have to do a search on that and from what I remember, its something you dont approach unless you REALLY have nothing better to fix (car runs fine, starts instantly at 10F, valves, prechambers clean, Injectors balanced, start of delivery OK....) and even then is kinda risky.

I could be wrong though.

-John
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Old 01-20-2005, 09:40 PM
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Thumbs up Good question...

Quote:
Originally Posted by odie
is the injection pump calibtates for a specific car? or is it just calibrated for it's own need?
Basically what I'm asking is...can I remove an IP from a good running engine and install it on another engine without recalibrating the pump?
Both are 617 turbos.
I have a running parts car and was curious about this. If say I wanted to trouble shoot a problem by swapping parts, can I just swap IPs and see what happens?
The calibration of injection pump is applicable to the pump only, not engine.
Each injection pump is calibrated on a test stand, and then delivered to the factory for installation on the engine.
I hope this answers your question.
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  #6  
Old 01-20-2005, 10:38 PM
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If I had a IP to swap I would take it to a IP service shop to have them check it out. It is rare for an inline pump to have major issues, they seem to be very durable but while it is out is the time to have it checked. The shop will also be able to tell you if it is calibrated correctly for your application. The short answer is bolt it in, set the timing and you are good to go. RT
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Old 01-21-2005, 06:28 AM
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It would be a good idea to get the "new" IP serviced (resealed and recalibrated) before installing it. A IP that has been removed and drained of fuel is alot more likely to leak. Also you won't have to R/R it again if there is a leak/calibration fault.
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Old 01-21-2005, 11:57 AM
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if anyone is looking for a good shop to do ip and injector nozzle work, give the Clark-son Co. a call. They are located in New Haven, CT on 354 Davenport ave. They specialize in bosch diesel injection. I recently had an injector nozzle rebuilt there.

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