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BMC 1500 smoking on idle


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As Tony says it sounds like an injector problem, try slacking the pipe off on each injector with the engine running, one by one, if the smoke stops there is your problem. Used this method on Land Rover diesels, usually works.

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3 minutes ago, Mike Hurley said:

As Tony says it sounds like an injector problem, try slacking the pipe off on each injector with the engine running, one by one, if the smoke stops there is your problem. Used this method on Land Rover diesels, usually works.

and at idle the one that stops the smoke  will probably make less of a difference to the engine running than the others.

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11 hours ago, Tony Brooks said:

I would want to know a lot more about those "reconditioned" injectors and exactly what was removed/replaced down the injector hole. Did the re conditioner ave the equipment to test Pintaux injectors or did they treat them as pintle ones?

Sorry i dont know i just know the chap reconditioned and re calibrated them ??

I have taken all the advice which is very much appreciated ;) i think i will get on to the chap that did the work and throw all these questions at him :D

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12 minutes ago, Chas78 said:

Sorry i dont know i just know the chap reconditioned and re calibrated them ??

I was just trying to point out that on the face of what has been said it seem there may well be a problem with the "reconditioning". If your chap did not free the  auxiliary spray hole, if he fitted the wrong nozzles, or if he has not set the correct break pressure then that could be the problem.

I suggest that you look at the later part of the other topic headed OIL in the BMC section. The last part has a lot that may relevant to your problem.

If the valve clearances are all correct or a little wide the you are faced with head off for inspection or injectors out to allow inspection of the holes and getting them tested but if your chap is not willing to give you chapter and verse of what he did and hat he set them to then I would go elsewhere. far too many so called professionals just put them on a pop-tester, reset the pressure and call them overhauled. doing it properly involves caustic baths. centrifuges, possibly nozzle lapping or fitting new nozzles, rebuilding, testing and setting the break pressure.

I think your next sensible step would be a compression test in case thee is low compression on one cylinder and then the injectors removed, the holes inspected (see other topic) and the injectors tested at least.

 

PS technically recalibration is a procedure for injector PUMPS so if he is using that word for injectors we may know what he means but it calls his knowledge into question.

Edited by Tony Brooks
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This is all new to me all i know is Rover V8 engines as P6 Rob will know these olde dervs are a big learning curve for me all i do know is he sonically cleaned them re calibrated them fitted atomiser washers and copper washers as for the top hats i presume the were already in the bores he did say there were no atomisers in two of the bores which he replaced :blush:

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29 minutes ago, Tony Brooks said:


If the valve clearances are all correct or a little wide the you are faced with head off for inspection or injectors out to allow inspection of the holes

Just to clear a point, you cannot see the injector nozzles by taking the head off. 

Sorry Tony not nit picking but I thought the OP may interpret this wrongly.

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10 hours ago, Boater Sam said:

Just to clear a point, you cannot see the injector nozzles by taking the head off. 

Sorry Tony not nit picking but I thought the OP may interpret this wrongly.

No, good spot. For the OP:-

Head off to look for gasket damage,  internal damage or wear to the pistons, cylinders, valves, seats & head.

Injectors out to initially check they are Pintaux and the pintles are all still there, then look at the tp hats, atomisation washers etc. 9see other BMC topic) and if all is well seed the injectors for testing.

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10 hours ago, Chas78 said:

This is all new to me all i know is Rover V8 engines as P6 Rob will know these olde dervs are a big learning curve for me all i do know is he sonically cleaned them re calibrated them fitted atomiser washers and copper washers as for the top hats i presume the were already in the bores he did say there were no atomisers in two of the bores which he replaced :blush:

This gets odder and odder.

It sounds as if this person was a boat mechanic rather than a diesel equipment specialist because he would have had to have the engine or head to check the top hats and fit atomistaion washers. As the other thread says each time the injectors are replaced new copper washers AND atomisation washers should be fitted. That is four atomistaion washers.

I can not say he did anything wrong or cut any corners but you have symptoms of a possible injector fault and that suggests he may have done. I know few, if any travelling boat mechanics who have the equipment to properly clean overhaul and test injectors - especially pintaux ones. I know a number have a pop tester to reset the pressure and do a field test. This, what you say was done and the use of the word calibration in relation to the injectors makes me suspicious.

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