Need Help: '63 305 V6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

meteshjj · 04-03-2012, 10:29 PM

Okay, so here's my story. I lucked into getting a 2WD 1963 GMC 1000 with a utility box, a 305 V6, and a 4-speed standard tranny. It's been sitting for 22 years in some guy's back yard, just kinda rusting away. I spent about 2 weeks (spread out over 6 months) getting the engine back up and running. I had to rebuild the carb, take apart the valves, rewire the alternator and the spark system... It was a lot of little things.

Now I have the engine back up and running, so, y'know, whoo. My next problem is that I have no brakes and no clutch. I seem to have fixed the brake problem for the time being (I'll do a full bleed once I get this thing back on the road), but the clutch is dead. By dead, I don't mean that the actual clutch doesn't work. Mostly, I am having trouble with getting any pressure on the clutch pedal. And when I say there's no pressure, I mean zero pressure. The pedal drops like a rock.

I think that I need to bleed the clutch as well as the brakes, but I can't seem to find where the bleed valve is. Can anyone help me out? Even if I have to rebuild the MC, I still need to bleed the lines, but they split in 2 directions, so I have no idea where to look.

Additional info: The clutch is hydraulic, and the master cylinder for it pulls from the same reservoir as the brakes. When I pump the brakes, I can see air bubbling up through the fluid. When I pump the clutch, nothing. However, if I take the lines off of the bottom of the MC, both pedals pump fluid.

A.T. RockDriller · 04-03-2012, 10:41 PM

From one utility box fella to another...
Well....the easy way to remedy that one is to get under there and crack the line at your slave cylinder...about 3/4 of a turn and then go up and start dumping fluid into your reservoir....to keep it topped off....and give it a while.
After a bit the fluid will trickle down to the slave cyl, and the air will work its way up to the reservoir and bubble out.
When you see fluid dripping from your cracked line, tighten her up.
You don't need to touch the pedal during the process, just make sure it's at the top of the throw.
That should give ya some clutch....
Good luck and where are yer pictures.....?

meteshjj · 04-04-2012, 12:34 AM

Thanks, that's actually not a bad idea. I have, however, found my problem. The master cylinder leaks too much on the clutch side, so the guy who had the truck before me reversed the brakes and clutch lines... I thought that was a little strange, but at least I have my problem solved for now.

As for the pictures, it's a little dark now, but I'll upload more when I get a chance.

duallyjams · 04-04-2012, 08:53 AM

Cool truck

**1971 GMC SHORTY** · 08-14-2021, 01:48 AM

Quote:

Originally Posted by A.T. RockDriller

From one utility box fella to another...
Well....the easy way to remedy that one is to get under there and crack the line at your slave cylinder...about 3/4 of a turn and then go up and start dumping fluid into your reservoir....to keep it topped off....and give it a while.
After a bit the fluid will trickle down to the slave cyl, and the air will work its way up to the reservoir and bubble out.
When you see fluid dripping from your cracked line, tighten her up.
You don't need to touch the pedal during the process, just make sure it's at the top of the throw.
That should give ya some clutch....
Good luck and where are yer pictures.....?

What a Beauty

1963c-10 · 04-04-2012, 10:25 AM

Has some nice hubcaps too.

meteshjj · 04-04-2012, 01:17 PM

Quote:

Originally Posted by 1963c-10

Has some nice hubcaps too.

Yeah... It has 3 different types of caps, so I think I'll just leave them off until I can get a matching set.

C10 - C90 Bill · 04-04-2012, 10:00 PM

Check that again, I believe you have a GMC 1500 3/4 Ton truck there. Check the GVW on the tag. It will say 5000 for a 1/2 Ton and 7500 for a 3/4 Ton.

Bill

meteshjj · 04-05-2012, 12:33 AM

Huh... you're right. It does say 7500. According to the registration, it's a GMC 1000... I guess I'll have to fix that when I get the title signed over. Thanks for that. I just took it for a ride today. All I had was the emergency brake, but man, did it feel good to get that thing moving after 6 months. The engine's snappy, the tranny's tight, and the clutch moves smoothly. I'm glad the guy who had it before was a mechanic.
Posted via Mobile Device

**Matt's k5** · 08-09-2021, 08:22 PM

Nice truck do you still have it? Mine could be its brother!

GMC-V6 · 08-13-2021, 11:37 AM

Nice engines I love them GMC V6s...

Mike

mikie 1954 · 08-15-2021, 08:24 PM

I don't know about MT but in calif the heavier duty the truck the more the tags are, leave it as a 1/2 ton and be happy.

04-03-2012, 10:29 PM	#1
meteshjj Registered User Join Date: Apr 2012 Location: Butte, MT Posts: 7	Need Help: '63 305 V6 Okay, so here's my story. I lucked into getting a 2WD 1963 GMC 1000 with a utility box, a 305 V6, and a 4-speed standard tranny. It's been sitting for 22 years in some guy's back yard, just kinda rusting away. I spent about 2 weeks (spread out over 6 months) getting the engine back up and running. I had to rebuild the carb, take apart the valves, rewire the alternator and the spark system... It was a lot of little things. Now I have the engine back up and running, so, y'know, whoo. My next problem is that I have no brakes and no clutch. I seem to have fixed the brake problem for the time being (I'll do a full bleed once I get this thing back on the road), but the clutch is dead. By dead, I don't mean that the actual clutch doesn't work. Mostly, I am having trouble with getting any pressure on the clutch pedal. And when I say there's no pressure, I mean zero pressure. The pedal drops like a rock. I think that I need to bleed the clutch as well as the brakes, but I can't seem to find where the bleed valve is. Can anyone help me out? Even if I have to rebuild the MC, I still need to bleed the lines, but they split in 2 directions, so I have no idea where to look. Additional info: The clutch is hydraulic, and the master cylinder for it pulls from the same reservoir as the brakes. When I pump the brakes, I can see air bubbling up through the fluid. When I pump the clutch, nothing. However, if I take the lines off of the bottom of the MC, both pedals pump fluid.

04-03-2012, 10:41 PM	#2
A.T. RockDriller Registered User Join Date: Feb 2011 Location: Orient, Oregon Posts: 722	Re: Need Help: '63 305 V6 From one utility box fella to another... Well....the easy way to remedy that one is to get under there and crack the line at your slave cylinder...about 3/4 of a turn and then go up and start dumping fluid into your reservoir....to keep it topped off....and give it a while. After a bit the fluid will trickle down to the slave cyl, and the air will work its way up to the reservoir and bubble out. When you see fluid dripping from your cracked line, tighten her up. You don't need to touch the pedal during the process, just make sure it's at the top of the throw. That should give ya some clutch.... Good luck and where are yer pictures.....? Attached Images __________________ Les Hunter '59 3803 someday to be 3853 '63 GMC K1000...351E, TH400 Daily '66 GMC 4000...351C, 5&2 Last edited by A.T. RockDriller; 04-03-2012 at 10:47 PM.

04-04-2012, 12:34 AM	#3
meteshjj Registered User Join Date: Apr 2012 Location: Butte, MT Posts: 7	Re: Need Help: '63 305 V6 Thanks, that's actually not a bad idea. I have, however, found my problem. The master cylinder leaks too much on the clutch side, so the guy who had the truck before me reversed the brakes and clutch lines... I thought that was a little strange, but at least I have my problem solved for now. As for the pictures, it's a little dark now, but I'll upload more when I get a chance. Attached Images

04-04-2012, 08:53 AM	#4
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: Need Help: '63 305 V6 Cool truck __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

04-04-2012, 10:25 AM	#6
1963c-10 Registered User Join Date: Nov 2011 Location: fayetteville nc Posts: 10,338	Re: Need Help: '63 305 V6 Has some nice hubcaps too. __________________ 1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer

04-04-2012, 10:00 PM	#8
C10 - C90 Bill Registered User Join Date: Nov 2001 Location: Moneta, VA USA Posts: 3,087	Re: Need Help: '63 305 V6 Check that again, I believe you have a GMC 1500 3/4 Ton truck there. Check the GVW on the tag. It will say 5000 for a 1/2 Ton and 7500 for a 3/4 Ton. Bill __________________ '60-'72 Chev/GMC Fan GMC 9500 Fan Detroit Diesel Fan

04-05-2012, 12:33 AM	#9
meteshjj Registered User Join Date: Apr 2012 Location: Butte, MT Posts: 7	Re: Need Help: '63 305 V6 Huh... you're right. It does say 7500. According to the registration, it's a GMC 1000... I guess I'll have to fix that when I get the title signed over. Thanks for that. I just took it for a ride today. All I had was the emergency brake, but man, did it feel good to get that thing moving after 6 months. The engine's snappy, the tranny's tight, and the clutch moves smoothly. I'm glad the guy who had it before was a mechanic. Posted via Mobile Device __________________ My Fleet: 1963 GMC 1000, 205 V6, 4-speed standard, 7'6" utility box, 100% Original 1969 Ford Bronco, 302 V8, 3-speed standard, 12" lift kit [SOLD] 1952 Ford F1, 239 Flahead 8, 3-on-the-tree, 100% original, fully restored 1993 Dodge Ram 250, 360 Cummins, 5-speed standard, stock (for now)

08-09-2021, 08:22 PM	#10
Matt's k5 BLAZER THIRTY!! Join Date: May 2007 Location: Utah Posts: 325	Re: Need Help: '63 305 V6 Nice truck do you still have it? Mine could be its brother! Attached Images __________________ 49 chevy 5 window 20 year project (sold)😟 57 ford fairlane (dad's car never got to it before he passed away R.I.P I LOVE YOU DAD.) 62 GMC 305 V6 custom L/B 72 HIGHLANDER K5 BLAZER 2nd owner 71 K5 MAMMA'S RIDE! 63 GMC 4X4 305 V6 62 GMC SHORT BED SERVICE BODY V6 (STUMPY) 74 GMC CUSTOM 1500 L/B

08-13-2021, 11:37 AM	#11
GMC-V6 Registered User Join Date: Jul 2021 Location: Mazomanie Posts: 16	Re: Need Help: '63 305 V6 Nice engines I love them GMC V6s... Mike

08-15-2021, 08:24 PM	#12
mikie 1954 Registered User Join Date: May 2009 Location: caliente ca. Posts: 297	Re: Need Help: '63 305 V6 I don't know about MT but in calif the heavier duty the truck the more the tags are, leave it as a 1/2 ton and be happy.



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