acem Posted November 21, 2025 Posted November 21, 2025 My 93 Dodge Cummins will not start. While troubleshooting it, I'm trying to remove the fuel shutoff solenoid but it won't come loose. I have removed stuff so I have good access and have a good open end wrench and have applied alot of force but cannot get it to budge. Got my (step)son who is stout as a mule to try and he cannot budge it either. Used a heat gun to heat it up until the plastic in the center got soft and it still does not budge. I expect someone put locktite on it. Thought the heat would help. Before trying to remove the solenoid, I replaced the fuel filter and bled the filter. I am not getting good fuel from the injector lines when loose. Any advice on removing the solenoid? If I put any more pressure on the wrench I am certain something will fail, most likely the flats of the solenoid. Thank You Quote
CIHTECH Posted November 21, 2025 Posted November 21, 2025 Little tap-tap on corner of hex with air hammer... 2 Quote
Powered by IH Posted November 21, 2025 Posted November 21, 2025 40 minutes ago, acem said: If I put any more pressure on the wrench I am certain something will fail, most likely the flats of the solenoid. Just put a small pipe wrench on it with a small cheater pipe then, unless you can't get it in there. 1 Quote
acem Posted November 21, 2025 Author Posted November 21, 2025 We've put alot of force on a good Proto combination wrench after heating it enough to melt the plastic in the center... Quote
acem Posted November 21, 2025 Author Posted November 21, 2025 Wish I could get a socket or box end wrench on it... It's supposed to be 10 foot pounds... Quote
Dirt_Floor_Poor Posted November 21, 2025 Posted November 21, 2025 An air hammer is sometimes capable of performing a miracle. 3 Quote
int 504 Posted November 21, 2025 Posted November 21, 2025 There is probably a special socket that fits it. I have some old ones that were for oil pressure senders and stop light switches IIRC that could possibly work. Check online for a socket that's made for it and try that. Quote
Injpumped Posted November 21, 2025 Posted November 21, 2025 It's 24mm, but 15/16 fits, try a good Snap On flank drive plus and see if it'll grip it. A few taps would possibly help. They get rusted in there, I put blue loctite on the threads when I rebuild them, to seal the threads off from rusting. 2 Quote
acem Posted February 17 Author Posted February 17 Finally got the pump off. The weather and all has made it difficult... With the pump off, sitting on a bench I still can't get it loose. How again do you use an air hammer to loosen it? Quote
GaAgTech Posted February 17 Posted February 17 Use an air hammer with a chisel bit on one of the flats near a hex point with it hammering counter clockwise loosening the solenoid. Works amazing on hydraulic lines and fittings. I use it to loosen a leaking hydraulic line (metal or hose) that couldn’t be accessed with a wrench without removing other lines that are in the way. And if you’re careful you can also tighten the line. Great tool that I’d never be without. 2 Quote
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