How do i un hydro lock my 1995 7.3L? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 08-23-2015, 09:58 PM Thread Starter
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Unhappy How do i un hydro lock my 1995 7.3L?

So i got this truck for $1500 guy needed money he was in debt.... anyways he said it was burning oil cuz it was leaking from the tubo so i went and changed the O rings it stopped burning oil then i drove it for a little bit it went down a quart so i looked in my fuel filter LOTS of oil and looks black i did some research its the O rings on the injectors so thats got to be the main reason so i changed those re installed injectors and went to fire the truck up got 4 to 5 loud cranks then i stopped then it ticked i was like ok the starter went out or something and it turns out its more than likely bad i tried to jump the starter with a screwdriver across both contacts and it goes click every time i do it so the starter is bad i checked the wiring it all seems good batteries are good so my main question is when i get my new starter how do i unhydro lock my engine from the oil/fuel i have glow plugs out and the injectors are in still i was told to take glow plugs out and crank it over a few times till all the oil spews out then replace glow plugs and start it up is that true? its 1995 OBS 7.3l POWERSTROKE 273k miles

owner of a 1995 7.3L powerstroke
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post #2 of 4 (permalink) Old 09-08-2015, 05:42 PM
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Pull the glow plugs.

The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
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post #3 of 4 (permalink) Old 09-08-2015, 09:19 PM
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And then turn it over BY HAND! Use a breaker bar and socket on the crankshaft pulley and turn over two turns at least.

Dave

2004 Ford F-350 Regular cab with 6.0.
Completely Stock.

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post #4 of 4 (permalink) Old 09-17-2015, 05:32 AM
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Yes, you want to turn it slowly at first as Dave mentioned.

Bent connecting rod is a common result of a fuel or oil hydro-lock condition if it locks while running or cranking to fast.

So now the question is, how did this all turn out, does it run now?

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
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