I need help people

1980-1986 Datsun 720 forums. All 720-specific topics and discussion can be found here.
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per84720
Posts: 23
Joined: Sat Apr 11, 2009 6:06 pm
Car: 1984 Nissan 720

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Hey guys..this is my second post I want to get the 720 running....the truck has been sitting for 4-5 years...i think when it stopped running it was left with fuel in the tank...should I clean out the tank..or pour some new fuel and try to start it...should i replace the tires...HELP ! .....Thanks

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breadbox
Posts: 8550
Joined: Tue Oct 17, 2006 4:09 pm
Car: Red 89 240sx,Black 89 Koop, White 84 720 4x4KC
Location: Va Bch

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From a thread about start a truck after like 10 years
herculesinwyoming wrote: "first i cleaned under the hood so it isn't so filthy, i pulled the plugs and put a little diesel in each cylinder let it sit over night, today i added marvel mystery oil and am letting it sit, then I'm gonna try to turn it a a few revolutions by hand with a breaker bar and socket.the engine oil looks like new so i will change it after i get the engine warm, all the ignition parts are new, cap, rotor plugs, etc"
datto510 wrote:"There may be a drain plug on the gas tank when you get to that point. Don't mess with the carb until you know for sure that it is messed up, it should at least get it running in the condition that it is in. "
I wouldn't worry about tires until it runs. If you can drain the gas, I would, then put new fuel in and give'er a'go.
Phlebmaster wrote:"If you are just trying to get it started..then don't mess with the carb yet.

Less to try and guess about and if it ran when parked then it should be fine just to get her going. I would then either rebuild it or put a weber on her. Keep the stock carb for emissions if you are required to pass that in your area.

Sounds like you are on the right track with the oil in the cylinders...try and hand crank the motor first like you said. That will let you know when she is ready for more action. start out slow and work your way into it. Change the oil before you start it up. "
Modified by breadbox at 6:31 PM 4/29/2009
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per84720
Posts: 23
Joined: Sat Apr 11, 2009 6:06 pm
Car: 1984 Nissan 720

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Oh man thank you ..i never thought about the oil... it would it just be sitting at the bottom huh...So i would have to take out the plugs and pour oil in each cylinder...um how much....Wait there is a drain pug on the fuel tank ....
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breadbox
Posts: 8550
Joined: Tue Oct 17, 2006 4:09 pm
Car: Red 89 240sx,Black 89 Koop, White 84 720 4x4KC
Location: Va Bch

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There may not be a drain on the gas tank. He was just telling him to look if there was one. In any case you can stick a hose in and siphon out the gas or remove the tank and clean it out.

I think just a couple drops or so just so the oil can sit there and hopefully lube the top ring a smidge. Let us know how it goes.
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phlebmaster
Posts: 912
Joined: Wed Dec 31, 1969 5:00 pm
Car: 1973 240z L26 4spd rip roar and ready to go!

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breadbox wrote:There may not be a drain on the gas tank. He was just telling him to look if there was one. In any case you can stick a hose in and siphon out the gas or remove the tank and clean it out.

I think just a couple drops or so just so the oil can sit there and hopefully lube the top ring a smidge. Let us know how it goes.
I would be carefull about being too rough with the tank...the float mechanism can get stuck.

The oil in the cylinders is a good idea too....I would use the marvel mystery oil because it is a light lube that is easily combustable. Put it into a spray bottle and send a few good squirts into each of the cylinders.
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per84720
Posts: 23
Joined: Sat Apr 11, 2009 6:06 pm
Car: 1984 Nissan 720

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Thank you guys for the info .... can get that marvel mystery oil at any parts store right....have any of you guys ever tried to remove the gas tank......i should probably look for that thread huh
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phlebmaster
Posts: 912
Joined: Wed Dec 31, 1969 5:00 pm
Car: 1973 240z L26 4spd rip roar and ready to go!

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per84720 wrote:Thank you guys for the info .... can get that marvel mystery oil at any parts store right....have any of you guys ever tried to remove the gas tank......i should probably look for that thread huh
LOL...yes on the oil.

I have never taken off a gas tank either, I would try a search.
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2kredz3
Posts: 150
Joined: Fri Apr 18, 2008 7:56 pm
Car: 1984 Nissan 720
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per84720 wrote:Thank you guys for the info .... can get that marvel mystery oil at any parts store right....have any of you guys ever tried to remove the gas tank......i should probably look for that thread huh <IMG NAME="icon" SRC="http://images.nicoclub.com/forums/image ... s/slap.gif" BORDER="0">
get a haynes manual, it goes over the gas tank removal. just a warning the haynes manual covers all ranges of 720 and can be somewhat confusing if you dont go slow. you can pick one up @ autozone
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per84720
Posts: 23
Joined: Sat Apr 11, 2009 6:06 pm
Car: 1984 Nissan 720

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Hey guys last week on saturday I was going to remove the tank to drain it..but then i thought about what one of you guys said about that there might be a drain plug and...there was one . dang I was about to remove the whole thing. So yea I removed the old gas...I took some pictures I will try to post them
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phlebmaster
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Joined: Wed Dec 31, 1969 5:00 pm
Car: 1973 240z L26 4spd rip roar and ready to go!

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Cool! I can't wait.
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