Quadrajet Rebuild
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Joined: Mar 2014
Posts: 76
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Quadrajet Rebuild
Hi Guys, On my way though my first car rebuild. It's an edelbrock 1902 that was used by my father on his 68 corvette back during the 90's for a few months. He eventually put the stock carb back on. I have these greyish deposits inside the carb and I can't figure out what the hell it is or how to get rid of it. Carb Cleaner and chem dip WHOLESOMELY INEFFECTIVE. Looks like this Picture
http://image.superchevy.com/f/366820..._tuning%2b.jpg
I took some sandpaper of 500 grit to the accelerator pump bore and the primary rod hanger bore to clean it out and it came off as a dark dusty grey. A majority of it is in the fuel inlet which leads me to believe it was a fuel additive. Also it's not present in any quantity on the airhorn or where fuel didnt touch it. Was thinking it was lead additive because we run it for the exhaust valves.
Not sure though. Anyone?
http://image.superchevy.com/f/366820..._tuning%2b.jpg
I took some sandpaper of 500 grit to the accelerator pump bore and the primary rod hanger bore to clean it out and it came off as a dark dusty grey. A majority of it is in the fuel inlet which leads me to believe it was a fuel additive. Also it's not present in any quantity on the airhorn or where fuel didnt touch it. Was thinking it was lead additive because we run it for the exhaust valves.
Not sure though. Anyone?
Melting Slicks
Joined: May 2007
Posts: 2,415
Likes: 154
Hi Guys, On my way though my first car rebuild. It's an edelbrock 1902 that was used by my father on his 68 corvette back during the 90's for a few months. He eventually put the stock carb back on. I have these greyish deposits inside the carb and I can't figure out what the hell it is or how to get rid of it. Carb Cleaner and chem dip WHOLESOMELY INEFFECTIVE. Looks like this Picture
http://image.superchevy.com/f/366820..._tuning%2b.jpg
I took some sandpaper of 500 grit to the accelerator pump bore and the primary rod hanger bore to clean it out and it came off as a dark dusty grey. A majority of it is in the fuel inlet which leads me to believe it was a fuel additive. Also it's not present in any quantity on the airhorn or where fuel didnt touch it. Was thinking it was lead additive because we run it for the exhaust valves.
Not sure though. Anyone?
http://image.superchevy.com/f/366820..._tuning%2b.jpg
I took some sandpaper of 500 grit to the accelerator pump bore and the primary rod hanger bore to clean it out and it came off as a dark dusty grey. A majority of it is in the fuel inlet which leads me to believe it was a fuel additive. Also it's not present in any quantity on the airhorn or where fuel didnt touch it. Was thinking it was lead additive because we run it for the exhaust valves.
Not sure though. Anyone?
Last edited by PAmotorman; Aug 16, 2016 at 09:25 AM.
Thread Starter
Advanced
Joined: Mar 2014
Posts: 76
Likes: 2
I'll try and run it to see if it ends up leaking out. Maybe I'll even JB weld or qwik steel the inlet to the body and run an inline filter because I'm a bubba
Le Mans Master
Joined: Jun 2006
Posts: 6,393
Likes: 1,225
From: Tampa Florida
http://www.lbfun.com/warehouse/tech_...uel%20Line.pdf
My plan:
Melting Slicks
Joined: May 2007
Posts: 2,415
Likes: 154
That....Is alot worse than I thought it would be. ****. Thanks! Will solder the screen on later too. I got some perfect size super fine screens laying around for that. Worried about the threads now that you mentioned it. They visually look fine except for the last few threads. What a shame since this quadrajet only had about 5k miles on it. Are there any options for repairing the inlet?
I'll try and run it to see if it ends up leaking out. Maybe I'll even JB weld or qwik steel the inlet to the body and run an inline filter because I'm a bubba
I'll try and run it to see if it ends up leaking out. Maybe I'll even JB weld or qwik steel the inlet to the body and run an inline filter because I'm a bubba
Last edited by PAmotorman; Aug 16, 2016 at 10:58 AM.
Thread Starter
Advanced
Joined: Mar 2014
Posts: 76
Likes: 2
unless you are into NCRS points chasing I would just find a better carb because if the filter fitting blows out you could have a fire on your hands. some Q jets can have a heli coil installed to fix the threads but you still have the flaking problem. check the needle seat threads in the body as they also get eaten away. i have rebuilt many Q jets and some are not worth messing with
@ green 71. Appreciate the tip. That'll be helpful when i get to that point
Last edited by NothingSpecial; Aug 17, 2016 at 02:47 PM.
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