3 fuel pumps have been replaced because of diaphragm failure in 2 months!
Why are the diaphragms failing, is it with the installation?
It can only go in the right way? any advice? what can I do to fix this?
2 Delphi's and a Cartier all out the weep hole. Can still drive with the
pump leaking. 3 pumps in a row, my nerves are shattered.
3 mechanical fuel pumps in 2 months on a YJ with no plates, the failures happen when driven @ 3 miles.
My engine oil has to go too. !@#%^&
I had purchased some kinda odd 15w40 oil for import diesel engines, could the oil weaken the diaphragm?
There is no spacer required between the pump and block eh?
Update: the oil was Castrol GTX Diesel 15 40. Full Syn for Heavy Duty Diesel. Has the formula to remove sludge, there is no oil sludge in the engine.
Cam wear on the Delphi levers was normal. The Cartier was a heavier spring that showed cam bite on the lever.
2nd Update
The pump on the Jeep when purchased was a Delphi and it was working with the 15 40 diesel oil, I replaced it for under $50.00 as a precaution. I did try to reinstall the working pump that was on the jeep and it did not work after a month on the shelf. The pump failures are when the motor is driving at neighborhood speeds and all failed in the past 2 months. Testing the jeep after installs of various new parts the gas starts out the weep hole on all 3 failed pumps.
Benson's replaced the 2 Delphis the next day and CT is replacing the Cartier the next day after pumps failed.
I am calling friends in Toronto and their mechanical fuel pumps are being replaced within mere months after new installs.
Yes, the common event is all pumps are failing at the same duration of operation of garage idle and neighborhood street testing of @ 3 k's
honestly, you can run a stopwatch, that's how common it is.
The jeep goes in 2 weeks for a DOT safety inspection.
I am draining the oil now and will not use diesel 15 40 but will go with gas 10w30.
The fuel tank on the jeep has been cleaned out last year as seen in my build thread.