Namerow Posted January 21, 2015 Share #13 Posted January 21, 2015 Anyone here who can comment on whether these newer-style Nikki pump diaphragms are compatible with E85 gas? Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-462254 Share on other sites More sharing options...
Fred Sigarto Posted January 21, 2015 Share #14 Posted January 21, 2015 Great writeup motivealloy!.... thanks, I have to rebuild my fuel pump on the Fairlady this Spring. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-462256 Share on other sites More sharing options...
Reverend Posted January 23, 2015 Share #15 Posted January 23, 2015 Nice writeup! If someone is interested, they still sell those Nikki (and the other OEM brand wich i cannot remember) pumps here in some places. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-462332 Share on other sites More sharing options...
Kerrigan Posted February 24, 2015 Share #16 Posted February 24, 2015 Darn. Rebuilt mine and I see now from this I made an error and put the new oil seal in upside down without doing the retainer ring because my fuel pump didn't have the seal in it when I took it apart and it was the original one on the car. Made in May 1971. Wonder how it got left off? Maybe rebuilt before and it was left out? Had 76,000 miles on it when it failed. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-464333 Share on other sites More sharing options...
bartsscooterservice Posted February 24, 2015 Share #17 Posted February 24, 2015 Anyone here who can comment on whether these newer-style Nikki pump diaphragms are compatible with E85 gas? I wouldn't run ethanol crap on a classic car. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-464335 Share on other sites More sharing options...
CanTechZ Posted August 19, 2015 Share #18 Posted August 19, 2015 Excellent write up, also wondering if you could use the rocker arm pin from an F10 pump to replace a worn pin on a 240Z pump? Mine has started to leak oil in that area. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-476054 Share on other sites More sharing options...
Careless Posted September 29, 2015 Share #19 Posted September 29, 2015 Excellent write up, also wondering if you could use the rocker arm pin from an F10 pump to replace a worn pin on a 240Z pump? Mine has started to leak oil in that area. Nikki Fuel Pump.JPG Did you find out any information on this? Can the pin be pressed out? Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-478192 Share on other sites More sharing options...
siteunseen Posted September 29, 2015 Share #20 Posted September 29, 2015 (edited) Here's a reman from O'Reillys. It's upside down so I can't see Nikki written on the dome top but I bet it is. If not you could swap the tops. http://www.oreillyauto.com/site/c/detail/IDF0/M23049.oap?ck=Search_E-1080_-1_-1&keyword=E-1080&doInterchangeSearch=true EDIT: I just ordered one and should have it Wednesday before lunch, I'll put up some pictures. Edited September 29, 2015 by siteunseen Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-478200 Share on other sites More sharing options...
Careless Posted September 30, 2015 Share #21 Posted September 30, 2015 The pin cannot be pressed out. It has two ball bearings swaged into either side. If you press one in on one side, it eventually breaks the housing by cracking it where the pin goes through, because there is a small step in the bore that the ball does not easily slide through to the other side. So yes, you can press the pin out. But the pump won't be useable. Found this out today. Wasn't fun. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-478224 Share on other sites More sharing options...
Captain Obvious Posted September 30, 2015 Share #22 Posted September 30, 2015 Bummer. If the Nikki pumps used balls pressed into counterbored holes on both sides, that's a tough one... Are the balls hardened? If not, one could drill (and maybe tap) them to extract them. I give it pretty good odds that they ARE hardened, but you never know. Some heat might also help with the removal as the aluminum case would expand more than the steel ball. Basically it's clear that they never intended those sealing balls to come out. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-478255 Share on other sites More sharing options...
Careless Posted September 30, 2015 Share #23 Posted September 30, 2015 I really don't think there's any way of removing them without making some serious dents and marks on the housing. heating is of no help either, because there is a step just beneath each ball. the step is the ID of the pin for a press fit, and the ball is larger than the step. so once it gets to the step, the area on the inside and around the pin just pops/cracks open. they are hardened ball bearings, they did not deform whatsoever. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-478261 Share on other sites More sharing options...
siteunseen Posted September 30, 2015 Share #24 Posted September 30, 2015 Dead end on the O'Reilly one. I'm giving it back. Link to comment https://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/?page=2#findComment-478273 Share on other sites More sharing options...
motorman7
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