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300tdi injection pump removal / refitting


Reiny

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My injection pump has just sprung a rather big leak from somewhere towards the rear end. I have booked the car in for a fuel pump overhaul but that means waiting until the 23rd. Specialist told me that if I remove the pump myself I can get it done some time during this week. Should I remove it myself? What is involved? The biggest job I have done on a 300tdi is replacing the timing belt. Is it a DIY job or should I be patient and let experts do it?

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Ok, the unit is now lying in a box on the floor, totally surrounded by loads of newspaper and plastic bags. Took just under 2 hours to remove. That's not too bad. One thing is worrying me though. When I tried to remove the timing pin from the pump, it wouldn't budge. Therefore I held the centre bolt and moved it a tiny bit to remove the pin. When I let the centre bolt go, the hub sprung by about 5mm to the left (towards 10 o clock). I have not tried to touch it. Is it a cause for concern (considering that the pump is going to be overhauled)?

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Ok, the unit is now lying in a box on the floor, totally surrounded by loads of newspaper and plastic bags. Took just under 2 hours to remove. That's not too bad. One thing is worrying me though. When I tried to remove the timing pin from the pump, it wouldn't budge. Therefore I held the centre bolt and moved it a tiny bit to remove the pin. When I let the centre bolt go, the hub sprung by about 5mm to the left (towards 10 o clock). I have not tried to touch it. Is it a cause for concern (considering that the pump is going to be overhauled)?

Thats normal, its because the pump when held in the timed possition is approx halfway through injecting fuel to number 1 cylinder.

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I'm really going to be a pain in the neck here friends but I've come to some grief. Crankshaft sprocket came out with no problems. Just screwed 2 bolts and tugged the sprocket out by hand. Seal was a bit difficult to remove but it gave way. New seal in, o-ring in pushed procket in, put timing belt on blah blah bhal, fired up the engine for a few seconds with front cover off, turned engine off and to my horror, found the timing belt slipping off the FIP sprocket by 3.5mm. In a nuthsell, I don't believe i pushed the sprocket in far enough. I tapped it in gently with the wooden handle of a handle (and tapped the head of the hammer lightly with another hammer). it didn't go any further in than it did by hand so i thought it was in place. Evidently, it wasn't.

Now, I have another question regarding the o-ring. When I pulled the sprocket out, the o-ring was seated within the sprocket. When I tried to fit the sprocket back, the o-ring kept it from slipping over the cranskhaft so I removed the o-ring and pushed it in as far as I could. Where am I supposed to put the o ring? In the sprocket or on the end of the crankshaft?

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page 219 ITEM 8 is the crank front oil seal, http://www.retroanaconda.com/landrover/parts_books/110/3_engine_200TDI_300TDI_V8_p168-299.pdf

page 215 item 10 is the 'O' ring seal http://www.retroanaconda.com/landrover/parts_books/110/3_engine_200TDI_300TDI_V8_p168-299.pdf

the O ring just slides onto crank but must be fitted over the timing gear woodruff key, the timing gear then pushes the O ring against the oil seal, as far as I can extract from my 300tdi workshop manual info.

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I suspect the o-ring is the reason the sprocket is out of alignment. You need to apply a firm, steady force to get the ring to seat inside the sprocket, hitting it with a hammer gently won't do it, and if you hit it hard enough to seat properly then you'll almost certainly damage the O-ring.

If you slide the O-ring on to the end of the shaft first, and then slide the sprocket over the top and push, you'll feel the sprocket move as the o-ring seats in the sprocket. If you don't feel it, it's probably not seated properly.

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