I just rebuilt my original 4657 fuel pump on my 63 coupe. I have reinstalled the pump and everything applicable is hooked up. However the engine will not start. I am unable to manually pump gas into the the carb by way of he linkage. Is it possible I have air in the line? when I removed the inlet side I plugged the line and when hooking the inlet side back to the pump gas was flowing. Any ideas?
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Re: 63 fule pump rebuild engine wont start
Kerry,
Providing you cranked the engine long enough to pump fuel to the carburetor could you have installed the valves in the pump wrong. -
Re: 63 fule pump rebuild engine wont start
My post was a misleading. After removing the fuel pump I found the problem to be the lower cover gasket. This is the only part I replaced on the pump meaning I did not remove or replace any internal parts. I have cranked the engine until it is nearly dead and no gas. I did add a small bit of fuel to the carb and the engine fired and ran until the fuel was used up.Comment
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Re: 63 fule pump rebuild engine wont start
When you reinstalled the pump did u make sure the fuel pump shaft engages properly with the engine?Comment
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Re: 63 fule pump rebuild engine wont start
As Ron said above, I hope you used a bolt to hold the pushrod from the cam when you removed the pump. Otherwise you may have forced the pump back on without the plunger on the pump engaged. There are many threads about this procedure.Comment
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Re: 63 fuel pump rebuild engine wont start
I made sure the best I could to make sure the rod was in the up position. The tip about the bolt was good as I was unaware of the trick. This is the sewcond time I have installed the pump. The first was several years ago and although it wasn't easy it worked. It looks as if I will be pulling and reinstalling the pump once again. Also, the hard fuel line that leads from the delivery line to the pump and the hard fuel line from the pump to the filter has metric fittings but the threads fit the pump. I know the pump was manufactured in Canada but are the metric fittings correct.Comment
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Re: 63 fuel pump rebuild engine wont start
Kerry -
No midyear Corvette ever had metric fittings or threads on any component. The elbow fitting into the pump has NPT (tapered pipe thread) threads, and the other side of the fitting has female SAE inverted flare threads, to mate with the male SAE inverted flare tube nut on the short pipe that connects to the main line on the frame with a rubber hose. If you have leaks at the fittings, the pump may be sucking air instead of fuel.Comment
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Re: 63 fule pump rebuild engine wont start
Rubber flex fuel line looks like this on my 62.Last edited by John F.; September 18, 2011, 10:43 AM.Comment
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Re: 63 fule pump rebuild engine wont start
I want to thank you all for the input. I have ordered correct lines and fittings and will install these prior to removing the pump. Obviously if the car still won't start the push rod must be installed incorrectly.Comment
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Re: 63 fule pump rebuild engine wont start
Kerry,
Even though the pushrod looks strong you may have bent it while installing the pump. If so the rod is now jammed in the block and not following the cam. When you remove the pump you can check this by seeing if the rod slides by it's own weight down to the pump mounting plate. If it does not move freely you have found your problem. Removing a bent rod will not be fun either. Check this and get back to us. If the rod is bent we can talk about removing it. BillComment
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