Lister SR3 aircooled

Hi Oz

Lots of Lister experience here but you might also want to cross-post to uk.rec.waterways as the SR3 is still relatively common in canal boats. I've got one in my garage that I lean bikes against and stand my coffee on!!

If you are lucky Tim Leech may pick this up from this ng.

Mike Ricketts

boats. I've

Hi Oz check the leak off pipes as they come off the injectors as they only push fit in rubber joints as this will put a lot of diesel in the oil also look at the injector pumps as the leak off pipes are fitted the same hear

Nick Holden Banbury Oxfordshire (UK) snipped-for-privacy@holden1.net

If your SR3 has a self venting fuel system then the leak back (return) pipes were notorious for being fragile and leaking fuel into the oil. It should be noted that the vast majority of these engines do not have the self venting pipework because this problem.

cheers

You may be getting confused here with the oil feed to the rockers, these do indeed have push fit rubber joints, at least on the later engines. I've never seen that on fuel piping, though, I don't thing I would trust it. A bit of leaking lube oil does no harm in that position, leaking fuel does. I've only ever seen silver soldered copper leakoff assemblies.

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

I've just got back from nearer your neck of the woods, Mike - taking my lad's rugby team (Lymm U15) to play against Limoux & Castelnaudary. It was a real hardship, 4 days staying by the beach near Perpignan ;^)

The question has been pretty well answered both here & on ukrw, but the prime suspect will always be the bleeds from the injector pumps, especialy if it's the self-venting type with a very fine pipe up to the injecor leakoffs.The pipes may fracture or the bleed screws simply vibrate loose. I have come across a leaking injector once (on a Lister HA), but the injector pipe unions will be the next candidate after the bleeds/leakoffs. You'll have to take off the fuel pump cover, which will also involve removing any air trunking which might be fitted. If it's not immediately obvious, running the engine for a short while with this or the rocker covers removed might be a little messy but will do no harm & should help you to pinpoint the source.

HTH Cheers

Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Hi Tim

Yes it is hard living down here. Many thanks for the reply - I was not the OP but merely suggested that the OP Xpost to UKRW because of the SR3s commonality with boats. He has had lots of advice now and is hopefully sorted.

Mike Ricketts