tweetyduck

how to set TDC on number 1

10 posts in this topic

need to change my vac pump and its easier to get out at TDC on number 1.

Is this a case of the marks lining up like when i changed the belt ?

Thanks in advance.

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First off, why does the Vacuum pump need changing ?

just align the TDC mark as for setting the engine for a timing belt change, but no need to strip the front cover off.

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Its weeping from the seal and the front plate.

Actually you know that 20p piece sized thing on the front. Also leaking from there.

do you think i should leave it. I have a OEM spare in the spare box.

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most likely it'll only get worse if left,

300tdi vac pump is only supplied as a complete unit, so there's no other part numbers for internal or external minor parts. gasket to engine block is ERR2027 if you need it.[new one is hopefully in the box with new vac pump.

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yes it is. Made sure.

Off to fit it then. What do you reckon....will i be back here in two hours or sooner?

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I've not done a vac pump on a 300tdi, so reckon it shouldn't take long, it's only 6 bolts & pipes.

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Its done. thanks for the help Ralph.

So thats new Calipers, Flex and Solid Pipes, Servo, Master and Vacuum Pump. Its all new. :)

Calipers were knackered

Pipes corroded on rear end

Servo split

Master OK but changed anyway

Rubber Flex changed for Goodridge.

Vacuum leaking

That should last the trip.....not long now.

One thing the pump plunger was pitted and i'd not say the shaft (cam shaft ??) was perfectly smooth either. Is that bad ???

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The only reason you should have to have No1 at TDC is so that the cam lobe for the pump is away from the pump foot. There's a powerful spring in the pump, so a bit of effort to push it in far enough for the bolts to get in the thread. There's no critical reason for the engine to be at TDC on No1 cylinder other than that.

Les.

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Thanks. I gathered as much. It went on easily and torqued up to 25nm the plunger gets pushed in. As you say had it not been TDC then i doubt i'd have got the bolts in.

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