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1944 ZTU Runs... But Hunts

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Ken Christopherson
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Joined: 01 Oct 2007
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PostPosted: Mon Mar 12, 2018 12:03 pm    Post subject: Re: 1944 ZTU Runs... But Hunts Reply to specific post Reply with quote

Right now it seems I have three issues:

#3 exhaust valve is sticking open....
Valve oiler is plugged in about 4-5 of the 8 locations
fuel tank is littered with pinholes on the front half...

Slowly but surely we will get there!
 
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MMDEL
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PostPosted: Tue Mar 13, 2018 7:46 am    Post subject: Re: 1944 ZTU Runs... But Hunts Reply to specific post Reply with quote

With the motor running, just take a pair of pliers, grab hold of those nails and rotate them back and forth till the oil starts to drip. You don't want the oil to run. You may have to move the nail up and down. After you get oil drip, you may have to bend the nail to aim it on the end of the valve stem.
MMDEL
 
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MMDEL
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PostPosted: Tue Mar 13, 2018 8:09 am    Post subject: Re: 1944 ZTU Runs... But Hunts Reply to specific post Reply with quote

I forgot to mention, you may be able to go though the spark plug hole with a thin punch and tap the valve back. Squirt some juice on it from both sides for a day or two first. If the valve isn't in the all the way open position. Drive it open just a tad with a hammer and a drift to break it lose. Then juice again let it sit and try to move some more. When going through the spark plug hole you will be at an angle, try to get as close to the center as much as possible so as not to bend the valve. Also sometimes you can grip the end of the stem with a vise grip and rotate the valve to loosen. When doing this mark the position of the valve on the retainer so when finished you can leave valve in the exact place where it was running because the mating valve and seat is where it will seal the best. You will have to remove that set of rockers to do this.
MMDEL
 
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Ken Christopherson
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PostPosted: Tue Mar 13, 2018 12:43 pm    Post subject: Re: 1944 ZTU Runs... But Hunts Reply to specific post Reply with quote

Thanks for the info! I will definitely try this next time I get over to work on it. Right now the project is to get the tank sealed up.
 
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