405 diesal leak

Hi,

I'd bet that Diesel pump's drive-end seal is worn. Have a Diesel specialist to replace the seal. It happended on my brother's '91 205 TD. Come on, it's a Roto / Lucas pump ?

Regards, G.T snipped-for-privacy@worldonline.fr

I agree. But I have known it on the Bosch type too, though only once or twice. Lucas much more!!!

usually doesnt make a difference on the make it usually down to overtightening of cam belt or the occasional fill with petrol by accident

the engine was acting very sluggih hardly any power then the power came back but with the leak does that work with the theory about drive end seal? the engine runs fine now but throws diesel out. would it b easier and cheaper to get replacacement from scrappies ?

Doesn't cost that much to get the seal replaced as long as there is no other damage. Of course you would have to get the pump off, but you would have to do that whichever route you took.

Hi,

It seems it's much more common with Roto's. Damn', my car has a DPC !

Possibly. Third choice, wrong type of fuel return "valve" (don't know the real term), happened with my brother's car : Bosch valve fit to a Roto pump. As Bosch's have a lower return pressure, the hole is a bit less big - this causes an overpressure which cracks the seal. That was the diagnostics of the Diesel specialist which overhauled the pump. Having later compared with my return valve, yes it's far bigger on Rotos.

Cheers, G.T snipped-for-privacy@worldonline.fr

Just make sure that the leak off pipes on the injectors are still OK. I had a similar problem with a leak, top offside of the engine, and it was the leak off pipe on the timing end injector, the one which is just a plug. Worth checking before stripping half the engine down.

Brian.

sometimes the seal simply goes because the pump bearing is worn in cases like these a new seal is a temp fix to be fair a good diesel mechanic can tell

Hi,

It makes good sense to me.

Yes. Giving the pump to a Diesel specialist would be my best advice anyway, as opening such pumps really requires that you know what you're doing - and I wouldn't consider taking the risk ! Excepted for easy ops like throttle actuator cover change, of course.

Regards, G.T snipped-for-privacy@worldonline.fr

if it leaks only when running, its worth checking the fuel return pipe, as this could be the problem, and it is in the timing belt area,

Fitzy

sometimes a tech will just fit a seal though not even checking for shaft movement then it will last a short while cos the seals are quite good and then fail later suppose some people get rid in the middle!!

also bear in mind that if the belt is contaminated it needs renewing too

i tried looking for the fuel return pipe but cant seem to locate it in the timing belt area there doesnt seem to be any pipes around that area at all i think the fuel return goes round other side doesnt it ????