Inline diesel pump questions

[Mustangstolli]

Hi
Below is a photo of my toyota 13b Diesel engine (out of a daihatsu delta), which I am putting in my bj40.
I have two questions:
1) I have labelled the photo with "hard line to no-where". This line is not connected to anything - what is its purpose?
2) I have labelled where I have two wires coming out of the pump. I have attached a second photo of the item. What is this and do I need to hook these wires to anything?

 

[Mustangstolli]

Photo of wires

 

[lostmarbles]

Photo of wires

There are 4 plugs (each called PLUG, INJECTION PUMP FELT PLATE) on the bottom face of the main body of the IP. They lie directly below each of the 4 delivery valves (and below the 4 related lobes on the IP camshaft) and are needed to gain access for assembly/disassembly work.

And it looks like they have a "square-drive" hole for torquing/loosening as shown here:


Could it be that one of these plugs has been removed and replaced with that hex-head plug you have that has the wires coming out of it.

It sure looks like this is what has been done because I think I see one of those square-drive plugs directly beside the wired plug in your photo.

If so, perhaps it's some form of fuel heater?

Anyway, if it is sitting there instead of one of those plugs I'd say it is non-OEM and the work of a previous owner (and it would be easy enough to remove it and check whether it is a heater or not).

I can find no record of Toyota installing anything other than the standard square-drive plugs in those holes.



PS. As for your pipe-to-nowhere, I'm curious too as I mentioned in your other thread..

 

[Mustangstolli]

Yes - it certainly does sound like it could be a fuel heater or something similar.
The 13b did not have a glow screen - supposedly these were a cold climate optional extra on the daihatsu delta - so maybe a fuel heater was a PO solution?
If I take out the hex plug - what is behind it? Do you have an exploded diagram? Don't want a spring loaded something or other to come flying out with a shot of diesel thrown in the mix!

 

[lostmarbles]

Yes - it certainly does sound like it could be a fuel heater or something similar.
The 13b did not have a glow screen - supposedly these were a cold climate optional extra on the daihatsu delta - so maybe a fuel heater was a PO solution?
If I take out the hex plug - what is behind it? Do you have an exploded diagram? Don't want a spring loaded something or other to come flying out with a shot of diesel thrown in the mix!

I began thinking of this immediately I woke this morning.

I now think it is far more likely to be a sensor for a tachometer (than any form of heater because heating the fuel WITHIN an IP is normally unadviseable).

As mentioned before, each of those plugs sits immediately below a cam lobe. This is the ideal location for a tacho sensor...

Some black oil will probably pour out when you remove any of those plugs but nothing else should. They are normally there solely for access purposes.

You now have the torque specs and if you have a good liquid sealer (and have the patience to get the threads cleaned properly prior to application of the sealer) then, unless you want to run a tacho from there, I'd remove it and replace it with a standard plug from your other IP.

I'll now go and search for some info on IP-mounted tacho sensors and add it if I can find any.

Edit: Yep! Found it... It is a "DETECTOR ASSY, REVOLUTION" and most likely part number 83180-36020. (Could alternatively be 83180-36010)

Man... That part number info is hidden DEEP in the bowels of the EPC and was very hard for me to find!


So. now that I've solved THAT one, how about someone explaining the other question about "the little piping piggytail-to-nowhere" in the fuel lines of many of our diesel cruisers?

 

[Mustangstolli]

Thanks for the help!!!

I think for now i will leave the tacho sensor in there (as it doesn't affect operation). Great to know what it is tho!

Is it a tacho sensor in the normal engine RPM sense - or is it to check speed of IP shaft lobe - ie it is more a sensor to ensue IP is working properly? I take it to make it work i would need to know pulse rate per revolution and match a tacho to suit?

 

[lostmarbles]

Thanks for the help!!!

I think for now i will leave the tacho sensor in there (as it doesn't affect operation). Great to know what it is tho!

Is it a tacho sensor in the normal engine RPM sense - or is it to check speed of IP shaft lobe - ie it is more a sensor to ensue IP is working properly? I take it to make it work i would need to know pulse rate per revolution and match a tacho to suit?

The sensor is used purely to drive a tacho (to display engine RPM to the driver) as far as I can see.

It's a 4-stroke diesel and the sensor reads off one cam lobe (for injecting fuel into one cylinder) so if my maths is correct, RPM of engine = pulse rate x 2

A 13B engine with a tacho like this can be found in an Aug 87 to Aug 88 BU85L-MDDHT3 Australian-market Dyna (for instance) whereapon the sensor would be 83180-36010 and the tach itself would be part of the instrument cluster (part number 83242-95BO2.

And this is that tacho image taken from the EPC:


By the way, many owners are keen to fit tachos to their old 40-series diesels and it looks like we've stumbled on a simple way to do it using a genuine Toyota sensor.

I wonder if one of the stand-alone Toyota Tachos (that aren't found embedded in an instrument cluster) is compatible with this sensor that you have there.

 

[Mustangstolli]

I have in the past fitted aftermarket tacho's to petrol engines that you could select 4, 6 or 8 cyl engines.
I would say this would simply be pulses/rev of the coil ie 4, 6 or 8 pulses per rev running with "wasted" spark on the exhaust stroke.
This sensor off the lobe would be 1 pulse per revolution, unless it is geared up or down? I'd say it would need to be geared down so that it is one pulse every two revolutions - as you would only inject once per cycle (no "wasted" injection - unlike wasted spark).
So not sure if this could work as it would be 1 pulse every 2 engine revs (confirming your 1 rev = 2x pulse rate) rather than 4,6 or 8 pulses every 1 rev.....

 

[amaurer]

Hard line to nowhere looks like it should go to the fuel return rail on the injectors?

 

[lostmarbles]

Hard line to nowhere looks like it should go to the fuel return rail on the injectors?

That would be fine Drew except it's apparently blocked off internally (but this is just my assumption) and I think this line here alongside it (arrowed in aqua-blue) goes to the fuel return rail:



Am I right MS?

And I remember seeing these "lines to nowhere" on other diesel cruisers but in slightly different places (if I recall correctly).

 

[Mustangstolli]

Yes, line just on the left of line to nowhere is return from injectors.
I will need to pull off the banjo fitting to see if line to nowhere may be blocked off. This was the case on the vacuum fitting off the back of the alternator and the line acted as a stopper to prevent incorrect positioning of the fitting.

 

[lostmarbles]

.... and the line acted as a stopper to prevent incorrect positioning of the fitting.

Yeah... I was thinking of that as a possibility ....

 

[Mustangstolli]

Ok - got home and took off the banjo fitting.
Solid tube - so used as a locating pin to prevent fitting being installed the wrong way or damaging injector return pipe by rotating fitting whilst tightening banjo!
Mystery solved! Thanks for the help and getting to the bottom of it!

Now for the tachometer sensor/aftermarket tacho issue.....

 

[Darkwing58]

I began thinking of this immediately I woke this morning.

I now think it is far more likely to be a sensor for a tachometer (than any form of heater because heating the fuel WITHIN an IP is normally unadviseable).

As mentioned before, each of those plugs sits immediately below a cam lobe. This is the ideal location for a tacho sensor...

Some black oil will probably pour out when you remove any of those plugs but nothing else should. They are normally there solely for access purposes.

You now have the torque specs and if you have a good liquid sealer (and have the patience to get the threads cleaned properly prior to application of the sealer) then, unless you want to run a tacho from there, I'd remove it and replace it with a standard plug from your other IP.

I'll now go and search for some info on IP-mounted tacho sensors and add it if I can find any.

Edit: Yep! Found it... It is a "DETECTOR ASSY, REVOLUTION" and most likely part number 83180-36020. (Could alternatively be 83180-36010)

Man... That part number info is hidden DEEP in the bowels of the EPC and was very hard for me to find!


So. now that I've solved THAT one, how about someone explaining the other question about "the little piping piggytail-to-nowhere" in the fuel lines of many of our diesel cruisers?

Part numFirm numFirmName
83190-1140B HINOPICKUP ASSY, TACHO
83180-36010-000 DAIHATSUPICKUP ASSY, TACHO
83180-36010 TOYOTAPICKUP ASSY, TACHO

searched for this part, mega zip.net shows out of stock.
amayama.com shows no shipments to the United States.
parts.lakelandtoyota.com shows discontinued.