k9unit Posted December 16, 2008 Share Posted December 16, 2008 is it a big job to change the vac pump and do i need any special tools disco 300tdi auto 1996 Quote Link to comment Share on other sites More sharing options...
cipx2 Posted December 16, 2008 Share Posted December 16, 2008 It's a 15 min job with a socket wrench + extensions. A flat screwdriver and a spanner will do but it will take longer and you'll have to crawl underneath. Quote Link to comment Share on other sites More sharing options...
freeagent Posted December 16, 2008 Share Posted December 16, 2008 I reckon it'll take you a littel bit longer than 15 mins, but as cipx2 said, its not a hard job. Just make sure you get the gasket on the right way around, as the holes are not equally spaced. Quote Link to comment Share on other sites More sharing options...
k9unit Posted December 16, 2008 Author Share Posted December 16, 2008 I reckon it'll take you a littel bit longer than 15 mins, but as cipx2 said, its not a hard job.Just make sure you get the gasket on the right way around, as the holes are not equally spaced. cheers mate any bleeding or purging needed paul Quote Link to comment Share on other sites More sharing options...
Orgasmic Farmer Posted December 16, 2008 Share Posted December 16, 2008 Had mine off last night to redo the gasket and to seal a leak in the riveted gasket on the outside of the unit. 15 mins sounds about right for removal. I removed the vertical crankcase breather pipe first to make it a bit easier (2 jubilee clips). There are 6 x 10mm bolts holding the unit to the block and you may need a screwdriver to ease the vacuum pipe from the outlet. The other thing I did on advice from Haynes was to set No1 piston to TDC. I did this by lying underneath and looking into the bell housing at the flywheel while turning the crankshaft nut (27mm) until the obvious slot appears. Apparently in this position the pump is off-cam so much easier to get back on! A tip is to have a stool or something handy to stand on (I have a large block of wood) as it makes life much easier when reaching into the depths of the engine bay! Quote Link to comment Share on other sites More sharing options...
patch1 Posted December 16, 2008 Share Posted December 16, 2008 Dose anyone know what sort of suck these 300Tdi pumps have, can it weaken over milage (275K) or do they just work or they don't. Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted December 16, 2008 Share Posted December 16, 2008 Mostly they either work or they don't. But occasionally there is one that becomes a bit weak, and the brakes don't work too well. The manual gives no figures for the vacuum you can expect from a good one. Sorry about that. Quote Link to comment Share on other sites More sharing options...
cipx2 Posted December 16, 2008 Share Posted December 16, 2008 Nominal specs: 1. Type of operation: Piston 2. Lubrication: circular pressure lubrication 3. Capacity: 85 cc 4. Operating speed: 5000 5. Port threads: Pipe Ø 9mm + 1x Ø 11mm 6. Mounting: 6x Ø 8.5mm 7. Drive: Camshaft 8. Typical performance curves: Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted December 16, 2008 Share Posted December 16, 2008 So -80kpa seems about right? (I wonder how many of us have a calibrated vacuum gauge - I do ) Quote Link to comment Share on other sites More sharing options...
k9unit Posted December 17, 2008 Author Share Posted December 17, 2008 thanks to all for your comments useful merry xmas paul Quote Link to comment Share on other sites More sharing options...
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