MD22 injector nozzle change.

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Heckler

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Peeps will recall that I bought a job lot of injector nozzles for my MD 22. I changed them today, fiddly etc getting the injectors out. The biggest issue was the leak off connections. Awkward to get at. I thought the no 4 injector under the raw water pump would be an issue but they all came out ok. At this moment in time I have just changed the nozzles without checking the break pressure, I need to get to Olhau to let a man pump them up and check the break pressures.Two of the old nozzles were wet, indicating a dribbling nozzle and one only had one only one hole functioning. Starting up after the change, the misfire has gone away and running for 10 minutes at full chat in gear has got rid of the blue smoke caused by incomplete combustion and wet carbon. So am well happy. I sold one of the sets of nozzles to one of the guys here but still have a set going back in the UK.
 
THDRE said:
Heckler,
I am interested in one of your sets of nozzles. Is your offer still available?
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Ive still got a set, but you need to check your injector nozzles for the correct part number. These are DLLA 150 P159 to fit a Bosch KBEL 68P 40 set to 225 bar, injector body
 
Heckler said:
Ive still got a set, but you need to check your injector nozzles for the correct part number. These are DLLA 150 P159 to fit a Bosch KBEL 68P 40 set to 225 bar, injector body
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Just an update, I got them to Olhau, three were spot on breaking pressure, one was about 220 bar. So, for the purposes of changing the nozzles without checking the break pressures, in an emegency, ok to do so
 
Beneteau381 said:
Just an update, I got them to Olhau, three were spot on breaking pressure, one was about 220 bar. So, for the purposes of changing the nozzles without checking the break pressures, in an emegency, ok to do so
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It is unwise to install new nozzles without a test of spray pattern break pressure and leakage. Presume nothing. Yes in an emergency accept the risks.

If there was an injector with partially blocked nozzle then I would be curious as to what caused it. Inspection inside the nozzle can often tell a lot and it might be a sign of internal rusting in a steel fuel tank or bugs. It is surprising what seems to find its way there in spite of filters.
 
Bilgediver said:
It is unwise to install new nozzles without a test of spray pattern break pressure and leakage. Presume nothing. Yes in an emergency accept the risks.

If there was an injector with partially blocked nozzle then I would be curious as to what caused it. Inspection inside the nozzle can often tell a lot and it might be a sign of internal rusting in a steel fuel tank or bugs. It is surprising what seems to find its way there in spite of filters.
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Thank you for your thoughts, as a youngster I was taught how to test and used to service injectors and am au fait with the risks etc. As I said in the original, I used them until I could get them checked. As for blocked nozzles, I have found carbon deposits to be the major blocking agent and the test kit from Hartridge used to include prickers to clear the nozzles.
 
Beneteau381 said:
Thank you for your thoughts, as a youngster I was taught how to test and used to service injectors and am au fait with the risks etc. As I said in the original, I used them until I could get them checked. As for blocked nozzles, I have found carbon deposits to be the major blocking agent and the test kit from Hartridge used to include prickers to clear the nozzles.
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Fine to hear you are aware of risks and procedures. When I was at sea we had equipment to service the various injectors on board when no facilities ashore.
 
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