Author Topic: 300 tdi landrover pump on an ALH TDI engine  (Read 14149 times)

Reply #30September 24, 2020, 11:06:33 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #30 on: September 24, 2020, 11:06:33 pm »
 Whaa I just updated it in the post before yours.
 He called me  today.

The hub seems to be brittle.
 He removed it to put it on the machine.
 When he went to put it back on somehow was using the sprocket mounting holes to hold it in place and the thing cracked.
 We can all learn from others mistakes.

 He ordered a new hub and I should have it back soon.

 He couldn't tell me why the RPMs kept hanging.
 He also put the old lever back into it.
 He of course couldn't tune it to TDI specs because they are in milivolts or something.
 Probably should be tuned to the specs of the AAZ pump.
Anyone have pump numbers for that one?
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #31September 25, 2020, 12:43:50 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #31 on: September 25, 2020, 12:43:50 pm »
  Bosch service center guy said my internal pump pressure was way too high and could crack the pump.
 79.77psi @ is probably double what it should be at 1000 engine RPM.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #32September 25, 2020, 01:35:47 pm

libbydiesel

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #32 on: September 25, 2020, 01:35:47 pm »
  Bosch service center guy said my internal pump pressure was way too high and could crack the pump.
 79.77psi @ is probably double what it should be at 1000 engine RPM.

I wonder if that is a discrepancy between crank rpm and pump rpm (1/2 crank).

Reply #33September 25, 2020, 11:50:28 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #33 on: September 25, 2020, 11:50:28 pm »
 Might be.
 Here's the quote from reply#22 in this post.
 Copied some from the M-TDI pump info thread:

 "It is sufficient to perform measurements at 1000 rpm and at 4000 rpm.
The pressure at 1000 rpm of the ENGINE should be about 5.5 bar, at 4000 rpm-9 ... 10 bar."
 5.5 bar is 79.77psi so I have that at about 2000 RPM instead of 1000 like it's supposed to.

 So it's supposed to be close to what the 1.6 uses.
About half that.
Glad I didn't crack the pump.
« Last Edit: September 28, 2020, 01:35:35 am by fatmobile »
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #34September 26, 2020, 10:58:55 pm

ORCoaster

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #34 on: September 26, 2020, 10:58:55 pm »
What?  Why am I confused?

In reply #32 you state your IP pressure of 5.5 bar is twice what it should be.  Then in Reply #34 you say you have 5.5 bar at 2000 RPM instead of at 1000 RPM.

A lower RPM would equal lower pressure at idle, yes?  So is your idle pressure 3.5 and the higher 2000 RPM is 5.5?   This isn't making logical sense to me.

But then somethings never do. 

Reply #35September 28, 2020, 01:39:28 am

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #35 on: September 28, 2020, 01:39:28 am »
 That whole section is a repost from post #22.
 When I was reading specs from the MTDI info thread.
 I brought it back, reposted it as wrong.
 Wasn't as clear as I could have been.
 Thanks for pushing me to clear that up.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #36October 06, 2020, 08:00:37 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #36 on: October 06, 2020, 08:00:37 pm »
 Got the pump back.
  The RPMs still hang, it doesn't seem to climb as much just hangs..
 He mostly dealt with things inside the pump.
  Nothing with the high pressure head.

 Something weird I noticed:
 When I was priming the pump with a vacuum pump on the "OUT" banjo, it wouldn't prime.
 I heard a hissing and it was coming from one of the delivery valves.
 I pulled the cap and I could prime the pump if I covered the delivery valve with my finger.
 Turned the pump 90 degrees and it did the same thing on the next delivery valve.
  Even weirder yet, it was number 4 (bottom left) that was sucking in air when the pump and engine were set at #1 (top right).
 There was no power to the pump.

 I haven't noticed this before.
 I don't know if it was because I always had the injector lines on before I primed the pump.
 Or maybe the screw-on caps sealed the delivery valves.
 Hard to believe after all the pumps I've primed this way that this would be normal and I wouldn't have seen it happen before.
« Last Edit: October 06, 2020, 08:04:13 pm by fatmobile »
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #37October 06, 2020, 09:46:18 pm

libbydiesel

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #37 on: October 06, 2020, 09:46:18 pm »
I haven't seen that before either although I typically install the lines onto the delivery valves (loose at the injectors) before priming the pump. 

Reply #38October 07, 2020, 12:42:14 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #38 on: October 07, 2020, 12:42:14 pm »
  I'll try powering it up and turning it with a wrench and see if it's still pushing out fuel on #1 when it's at TDC.
Because it's weird that it leaks on 4 when the engine is at 1.
 Also wondering if the plunger might be bad and air/fuel is leaking past it.
 Has been a couple time that I shut it off and it didn't shut off right away.
 Also times when I rev it and it kills just stops.
 Thought it might be that butterfly in the intake shutting,.. but reved it in the engine bay and it killed
but that didn't move.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #39December 07, 2020, 07:03:29 pm

Chuck1978

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #39 on: December 07, 2020, 07:03:29 pm »
Did you find any resolution to your pump issues?  It sounds like it was running pretty well aside from the odd running condition issues with revving it just killing it outright. There seems to be some internal issue going on without a doubt I'd guess.

Reply #40December 07, 2020, 08:48:00 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #40 on: December 07, 2020, 08:48:00 pm »
  I'm putting a timing belt on a 2003 TDI.
 I'm going to swap this pump onto that engine and see if the problems move with it.
 I can't see how these problems could be caused by the engine but
this should rule it out.
 I see I haven't posted the numbers on the pump.
 Sometimes I wonder if it's a left handed pump.
 Here's a pic of the plunger next to the 1.6 plunger.
 I can see all the way through the holes on the end.

 Flicker is upgrading or something.
 I'll post them later.
« Last Edit: December 07, 2020, 08:56:41 pm by fatmobile »
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #41January 13, 2021, 11:25:09 pm

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #41 on: January 13, 2021, 11:25:09 pm »
  I put the pump in the 03 TDI Jetta wagon,..
 and it did the same thing in.

I put it back in the Golf and swapped delivery valves.
 Still had hanging RPMs.

I'll post the pump numbers.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #42January 14, 2021, 07:32:39 pm

libbydiesel

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #42 on: January 14, 2021, 07:32:39 pm »
Well, that was a good test.  It pinpoints the pump as the issue. 

Reply #43March 30, 2021, 12:05:12 am

fatmobile

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #43 on: March 30, 2021, 12:05:12 am »
 Bought a pump from Andrew Libby.
 It's spinning tires and burning clutches like it should.
 Runs great.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #44March 30, 2021, 05:15:16 pm

libbydiesel

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Re: 300 tdi landrover pump on an ALH TDI engine
« Reply #44 on: March 30, 2021, 05:15:16 pm »
Excellent!

 

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