Re: Attempting my first build 72 K5
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Re: Attempting my first build 72 K5
I've never actually done it but from reading a few things the engine should idle for a good 30 seconds on just the fuel in the carb bowls. They say to add about 1/4 cup of gas. Are you adding that much?
Also in the reading it says that within that 30 seconds of idle if the fuel pump hasnt pulled gas from the tank to the carb you have other issues. |
Re: Attempting my first build 72 K5
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What if it's not even idling for 30 seconds? Could the distributor have anything to do with this? I know the distributor got moved around from where it was set originally from the place that built the motor. If the timing was really off, could that cause it from not being able to hold an idle? |
Re: Attempting my first build 72 K5
Might as well make sure/double check the engine is at TDC on #1 with the distrubutor set to fire on the #1 cyl. Should get you close enough to twist the dizzy around as you need to get her going.
Other than that...make sure the idle screw on the carb are not closed?? |
Re: Attempting my first build 72 K5
I had another idea on you trying to start the engine.
Get the fuel bowls full and use fuel hose to hook the fuel pump to a gas can. If you can get it to run from the gas can it might be another issue down with the tank or fuel lines. Make sense? Lastly going back to the carb adjustment - might want to up the fast idle screw. Could keep it idling vs dying. |
Re: Attempting my first build 72 K5
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I used the PowerMaster, and I know it said not to crank for more than 30 or so seconds at a time or it could damage the solenoid. Any chance you burned that up? |
Re: Attempting my first build 72 K5
you know Mike it might be worth the $75 or whatever to get a regular starter from Orielly just to see if it takes less shims.
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Re: Attempting my first build 72 K5
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I took a couple days off to clear the mind and I swear that helps when you go back to working on these darn ol trucks. Turns out my battery was starting to lose juice.. I tested it and it was only pulling 10 Volts... Plugged it into a charger last night and will get back after it today. It makes sense because the starter was cranking and disengaging from the flywheel with no problems when I first installed it without using shims.. Quote:
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Re: Attempting my first build 72 K5
Starter theories can be kicked to the curb now.. She cranks over and disengages from the flywheel.. It was def the battery. Now, I can get back to figuring out if it's my fuel pump or if something is going on in gas tank
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Re: Attempting my first build 72 K5
It's gonna take a while to fill the fuel line. It will fill faster if you fill the carb bowl and it ran even short intervals (I would not use starting fluid ). I have also been replacing all my old school 3510 high torque starters with the newer gear reduction type.
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Re: Attempting my first build 72 K5
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Re: Attempting my first build 72 K5
Prime the pump so to speak with starter fluid and fire it up?
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Re: Attempting my first build 72 K5
Everyone's rooting for you, Mike! :metal:
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Mike it's going to work itself out and you'll be the envy of the west coast in short order I'm sure with that driving work of art. I spent the past week in Santa Barbara and thought of you and your build. |
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Re: Attempting my first build 72 K5
Thanks all for the support. I appreciate it the suggestions and everything.
So here's the latest.. Good news - I know what the problem is.. Bad News - In order for me to run mechanical pump I would have to change camshafts.. I removed the fuel pump and pressed the pushrod up against the cam and held it with pressure using my thumb while a buddy cranked the motor over for about 20 seconds.. There was NO pressure.. I called Motor Works, gave them my build number and told them what was happening. The cam that was built for my motor does not have fuel pump eccentric lobe so it will only work with an electric fuel pump.. Problem is.. I ordered this thing 3 years ago and even worst, I went through a middle man (west coast engines). When the order was placed it was originally for e-pump. I called Brady (west Coast Engines) and told him I wanted to run a M-Pump and he said no problem.. He must have not communicated that back to motor works.. I don't have this in writing (email) bc I called him on the phone to let him know I wanted to run a m-pump.. I have two options. 1. Use an electric pump 2. Put in a new CAM. First one sounds like the easiest and quickest solution. However, bc I have pre-bent SS lines, I will have to remove this and create a custom line myself and place the e-pump somewhere down along the frame rail.. The second option only sounds enticing bc I would opt for a bigger lift and duration.. Might as well right since you're going to swap cams.. Decisions decisions decisions... I could run an e-pump for now just so I can get this on the road much sooner. and if I really don't like it I could change out the cam some time down the road.. seems like a lot of work though |
Re: Attempting my first build 72 K5
craaaap. Man i used the same engine builder and middle man as you!
I wonder about my cam and ability to use a mech fuel pump! |
Re: Attempting my first build 72 K5
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Re: Attempting my first build 72 K5
After looking into e-pumps, they all say to mount below and close to tank as possible.. Umm okay, I guess I'll just slap this pump onto the axle since this seems to be the only spot that's below tank :uhmk:
I thought I could just have it sit inside the frame rail, but that only gets me halfway to the bottom of the tank.. other options, I could drop 400-500 on a self priming e-pump, but I'm not really feeling that idea. |
Re: Attempting my first build 72 K5
If you go electric fuel pump don't you need a fuel return line to the tank?
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Re: Attempting my first build 72 K5
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Re: Attempting my first build 72 K5
Looked into a few discussions on the good ol interweb... seems the consensus leans towards not needed a return fuel line, I think from what i read, if you have a regulator it's keep the fuel cooler which is what the return line in theory is supposed to do.
Regarding my previous note about it being mounted below fuel tank.. I called Summits tech line and the guy helped me find a pump that is self priming (pull/push) so it's ok to mount above tank. https://www.summitracing.com/parts/sww-82091 None of the pumps listed online have no description if its self priming or not.. I think they refer to it as a "lift" |
Re: Attempting my first build 72 K5
I wonder if you can get creative with the mounting and not have to modify the SS fuel lines you already have in place.
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Re: Attempting my first build 72 K5
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In-between the main fuel line inside the rail of the frame and fuel tank, there is a spot I could mount it.. This would put it as close to the gas tank as possible. I'm already preparing for Murphy's law, the fuel pump has to be mounted perfectly vertical and I would bet this pump is going to be too tall to place inside the channel of the frame. Today, I'm going to pull the gas tank and start piecing together how I'll route everything. I'll probably end up having to fab up a u-shaped bracket that extends out just pass the frame rail so the fuel pump is able to be mounted vertically without any obstruction. If I didn't want to go through all that work, I could mount it on the outside of the frame, but that's just going to look off and probably could get damaged. |
Re: Attempting my first build 72 K5
thats basically the spot i had in mind - good luck with it!
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Re: Attempting my first build 72 K5
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Here's the solution I came up with for the e-pump. Picked up a bracket from OSH with a a 90 degree bend and cut it down to 4" in width.
I really didn't have a whole lot of options for the pumps mounting location. I found this area right in front of the bracket coming of the frame for the brake hose. Attachment 1693323 Drilled 5/16 hole here.I'm only using one bolt (5/16) to hold the bracket in place. It feels like it will hold up fine. Attachment 1693326 Attachment 1693327 Had some left over braided hoses, so for the fuel coming into the pump from the tank I made up this line. I like the idea of using this style. If I ever need to remove the tank of pump, I can easily access the tube nut with a wrench from either end. Attachment 1693324 Attachment 1693325 |
Re: Attempting my first build 72 K5
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Here's the pump with everything hooked up.
Attachment 1693328 Installed a new power master starter. This thing saves a lot of room and makes for a nice clear path for the battery cable.. With the stock starter and headers the cable gets way to close. Attachment 1693332 I'm running a manually operated switch, however, whenever I connect the battery the fuel pump is drawing power and starts pumping. Attachment 1693331 There's the one main positive wire coming off the pump and a ground wire. I'm using butt connector for two power wires.. 1 goes to the battery and the other one goes to the switch. I also have another wire coming off the battery terminal to the switch. That's how I was told to wire it up so I can manually turn on/off the pump. I'll have to do some more research on this and come back to it. |
Re: Attempting my first build 72 K5
Fired the motor up and she's alive and breathing. I let run for about 2 minutes. I'm hoping my friend can make it over to help me set the timing. I want to get that dialed in right away.
Here's a video of me starting the motor. |
Re: Attempting my first build 72 K5
If this motor doesn't have roller lifters, you need to stop starting it up for theses short periods and. You need to start it up and get the rpm's up to 2000 and keep it there for 20 minutes, or you will flatten that cam. Continued short runs won't allow the break in lube to do its job on the lobes. That first start up is critical to the longivity of a flat tapper cam.
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Re: Attempting my first build 72 K5
Not to speak for Mike but pretty sure he went with a roller set up.
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Re: Attempting my first build 72 K5
Another milestone achieved. I smell success. Congrats!
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Re: Attempting my first build 72 K5
Figured out why the e-pump would receive power as soon as I connected the battery.. I removed one of the red wires, the one I had going from the pump to the battery.
I now have it setup like this: Positive wire from e-pump to switch Red power supply wire from positive battery terminal to switch Ground for pump Ground for switch. Now I got to go hide this switch somewhere only I know:devil: |
Re: Attempting my first build 72 K5
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A family friend of ours has been a mechanic for 50 years and he's been my go to for any kind of trouble shooting over the phone. He was supposed to come over today to help me bleed the brakes and set the timing, but he had a few things come up. Hoping he can make it tomorrow.
There's a local car show happening October 15th, less than a mile from my house. It's at the Santa Cruz Harbor and I plan to debut it there. It would be safe to say the list of things I need to get done is now a short list.. I'm down from 3 white boards to only half of one. That damn Horn relay as been lingering for a while. I don't think that's the right description for what I need to do. The horn closest to the fender originally had a plastic housing connector ( I still have it but took the terminal out of it) that used a two spade type terminal. the connector plugged into the horn closest to the fender and it used double spade terminal to feed the other horn. Been searching everywhere for this kind of terminal but no luck Attachment 1693526 Here's where I was 8/14. I had three white boards filled back in the middle of June when I first got her back from paint. Attachment 1693520 Where I am now. Attachment 1693521 |
Re: Attempting my first build 72 K5
Super cool!
I'm new to the board. I just bought a 72 Jimmy area weeks ago. Will have it repainted and restored over the next couple of months.im trying to retain it mostly stock and the original orange color. I'm just over the hill in mountain view. I hope to meet you on the road next year sometime! |
Re: Attempting my first build 72 K5
Mike--apologies for being late to the congrats...can't believe I missed this most important milestone. Congratulations!!!! Huge step. You're conscientious and thorough approach, your willingness to share, and gosh, lately your ENGINEERING are all to be commended. I sure have enjoyed this follow. You'll be spinning that odometer any day now. Well done!!
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Re: Attempting my first build 72 K5
Steering wheel in. I really liked how this looked on Ironcaine's.
Attachment 1683090[/QUOTE] What is the steering wheel - Wood ? Looks good. |
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