300tdi plunger lift - Defender Source
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  #1  
Old December 14th, 2012, 10:57 PM
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Ethan
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300tdi plunger lift

Does anyone know what injection pump plunger lift at TDC should be? I've got a sick 300tdi at work that, at risk of sounding un-PC, seems to be a bit retarded. I couldn't find a value in Rave,and thought maybe someone might know. Thanks a lot!
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  #2  
Old December 14th, 2012, 11:26 PM
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Eric Williamson
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1.54mm. Though some say 1.6 is the hot-spot.

Eric.
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  #3  
Old December 15th, 2012, 12:41 AM
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Ethan
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Thanks so much!
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  #4  
Old December 15th, 2012, 04:07 PM
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Matthew
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how exactly does 1 measure this plunger lift?
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  #5  
Old December 15th, 2012, 04:28 PM
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Quote:
Originally Posted by Naplm00 View Post
how exactly does 1 measure this plunger lift?
On the back of the IP, in the center of the fuel line outlets, is a plug. Remove it. Inside is the plunger, it rises & falls as the IP turns over sending fuel to each fuel line. To measure this rise and fall requires a screw in adapter & a dial gauge. To adjust the rise & fall requires the front gear/pulley to be adjusted and slightly turned clockwise or counter with the pin to gear (tool) inserted to maintain timing.

If I got any of this wrong please chime in to correct me.

Here's some more info.
http://www.dividingcreekimports.com/...umpTuning.html

Though this is a VW site the Bosch IP is basically the same
http://vincewaldon.com/index.php?opt...d=24&Itemid=28

Here's a thread from our forum
http://www.defendersource.com/forum/...ad.php?t=36001

And from the land of OZ
http://www.aulro.com/afvb/technical-...-timing-2.html

Couple more
http://www.cs.rochester.edu/~jag/vw/...i/injpump.html
http://ww2.justanswer.com/uploads/Cl...imingMARKS.pdf
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  #6  
Old December 15th, 2012, 05:00 PM
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John B.
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No you do not loosen the pump. The adjustment is the same way as normal with the adjustable pulley in the timing case.

You turn the engine until just shy of TDC. The dial gauge will not move for a bit. This is where the plunger is at its bottom. Zero the gauge. Continue turning until the engine is at TDC (by the notch on the ring gear). Note the dial gauge reading and that is the lift.
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