Ford transit 2.5 diesel - broken

i have a Ford transit 2.5 diesel and am currently encountering problems.

the problem is that when the van starts its runs smoothly for a few minutes before the engine gives a bang and lots of black smoke i have read posts and this seems to be quite a common problem however there never seems to be any solutions.

any information will be greatly appreciated

thanks

graham

Reply to
dodgydeals1
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Could really do with soe more infor about the van.

What age is the van?

What do you mean the engine gives a bang?

Does the engine smoke at idle, when revved or all the time?

Has this appeared suddenly or gradually?

If you can give me some answers to those questions, I'll point you in the right direction. From what you've said so far, possibilites are Injection Pump, Injectors, Timing, valve problems, EGR valve problems, fuel air locking. There are plenty other possibilities.

moray

Reply to
Moray Cuthill

You need to take it to a diesel specialist to have the pump and timing checked over.

Reply to
Conor

we have taken the head off and the pistons and rings are okay the bang was the oil filler cap blowing out and the van is Y reg milage 70,000 rgular services the head gasket appears to be okay but we will replace when rebuilding looking like EGR valve or injector pump any suggestions??

thanks

graham

Reply to
dodgydeals1

Blocked breather? Summat is building up the pressure in there.

Reply to
Conor

You still have not told us which model of Transit is it, and the engine fitted!

Tim..

Reply to
Tim..

"Tim.." wrote in message news:df3ntn$rgb$ snipped-for-privacy@nwrdmz02.dmz.ncs.ea.ibs-infra.bt.com...

On a Y-reg, to be a 2.5 diesel it must of been a late registered old style (95-2000) transit.

I've never seen one of these engines blow out the filler cap (I'm sure the filler cap can not come of when the bonnet is shut, as it rests against the bonnet lining). Anyway, obvious checks would be to check for excess blow-by gases (remove filler cap with engine running at idle, and see how much gas flow is coming out it. There should be a gentle flow of gases, but if you can visually see exhaust gases coming then there's a major problem most likely with the pistons/rings/bores) Next would be to check the engine breather (built into the filler cap). Remove all the connecting pipes and check for any obvious blockages. Also subsituting the filler cap for a known good one is worth a try. Next check would be the EGR valve. Check that the operating linkage (the one from the top of the pump to the EGR valve itself) is properly connected, and adjusted correctly. When the throttle is held full open on the injection pump, the roller (also check the plastic roller is still there, as they do fall off - ideal replacement is the head of a monobolt, as the plastic roller isn't available seperatly) on the EGR valve should be just past the peak of it's track. Another possibility to try is temporarily disconnecting the stainless steel pipe coming from the exhaust manifold, Next thing to check would be the engine timing. I've seen many belts jump a couple of teeth, and can cause the exact running you describe (lots of smoke/no power).

If none of the above showed up anything, i'd then be checking for the fuel system airlocking. This is a known fault on this engine, and the rework is to alter the injector leak off pipe routing. Instead of being blanked off at the front injector, with the leak of pipe return line to the tank connected to the rear injector, the rear injector is blanked off, and a new long return pipe is fitted to the front injector.

Then if all that hadn't shown anything, next item to get checked would be the injectors. You'd need to take them off and get a diesel injection specialist to check them, and any decent specialist would be able to tell you if they were blocked, and if there is any obivous fault with the injection pump (common for the later bosch pumps to brake up and clog the injectors - has the van been noticably slower recently?)

Failing all that, you're looking at a major mechanical problem with the engine, which would then require the removal of the cylinder head for further inspection.

Reply to
Moray Cuthill

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