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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Thu Jan 30, 2014 3:18 am Post subject: Hot Judson 36er |
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ok guys, need a hand here.
have a stock 36er with judson, on the highway it runs sweet for about 20mins then gets hot and dies like no fuel is getting through.
wait 5-10mins an away it goes again.
ive tried this a couple of times an both times after it stops i jack the decklid for more airflow an it runs fine again.
has the same problem on cold and hot days and stopped at the same place on the road both times.
been trying to figure it out for ages now.
stock engine
timing is at 7.5
copper line cooler
judson coil
any help/thoughts/info would be good.
(john??...) _________________ shiny paint doesnt make it worth any more |
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Fishynos72 Samba Member
Joined: November 27, 2010 Posts: 515
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Posted: Thu Jan 30, 2014 4:32 am Post subject: |
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Judson's have a particular issue. perhaps you're suffering from it....
they lean off. the engine suddenly feels like it is running really good. But it will get hotter and hotter until rings melt. I've heard a few examples of this happening. can't remember exactly how to fix the issue.
Obviously if you haven't already install the stronger 'judson' fuel pump spring and maybe take your carby jet size up a little?
just my 2c chances are I'm wrong _________________ Collector of all things Volkswagen, Hazet and Matra.
1972 1302
1973 type2a
1957 type11
2005 Caddy panel van
2006 Golf R32 |
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jnr356 Samba Member
Joined: October 09, 2003 Posts: 205 Location: melbourne,australia
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Posted: Thu Jan 30, 2014 4:50 am Post subject: |
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checked your tappets lately dion? _________________ melburgluft.com
australias real aircooled community |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Thu Jan 30, 2014 11:48 am Post subject: |
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Fishynos, I have the larger spring and jet installed, that's one thing I've been thinking it is too, that or a vapour lock on the tank but the tank seems fine still too.
Jnr, I rechecked tappets/head torque/timing just last week thinkin it might of been a valve.
always running 98 octane in it too, won't use any fuel lower than that _________________ shiny paint doesnt make it worth any more |
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60ragtop Bonneville Belt Bitch
Joined: March 13, 2006 Posts: 7800 Location: Big Wonderful WYO 82401
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Posted: Thu Jan 30, 2014 12:36 pm Post subject: |
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check your fuel tap for debris floating in it. pull it of and just run a regular tap and see if it takes care of it. I also had a bug that had a piece of straw in the main line floating around causing same problems That one was a fun one to figure out. _________________ Rick
Certified Mechanic by the State of Michigan in 1977
ASA certified in 1987
Certified Hunter Wheel Alignment Master Technician 1986
tasb wrote: |
I've restored a large number too, but I don't toot my horn quite as loud.
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sb001 wrote: |
maybe he just snapped cause his car sucked |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Thu Jan 30, 2014 12:47 pm Post subject: |
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I rebuilt the fuel tap an cleaned the tank thoroughly when I built it, but I'll check it again since I'm nearly out of fuel, the lawn mower gets my tank fuel too..
Was staring at the engine and noticed something. Was missing the front nut off the carb to Judson to manifold but the waste was there. New nut didn't tighten up but pulled the stud, so put a bolt in from the underside through.
Maybe too much air intake was making it run hotter?
Have to test it this arvo an see. _________________ shiny paint doesnt make it worth any more |
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Fishynos72 Samba Member
Joined: November 27, 2010 Posts: 515
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Posted: Thu Jan 30, 2014 5:21 pm Post subject: |
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More air would lean it off and cause overheating like I said _________________ Collector of all things Volkswagen, Hazet and Matra.
1972 1302
1973 type2a
1957 type11
2005 Caddy panel van
2006 Golf R32 |
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AirCooledClassics Samba Member
Joined: August 20, 2004 Posts: 294 Location: Saskatoon, Sk Canada
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Posted: Thu Jan 30, 2014 8:43 pm Post subject: |
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If you want a qwick check on the vapor lock . Take a big cold drink and some ice in the cup . when the car dies ice the fuel pump .if it.s vapor lock it should start and the problem is located. the big fear here is is the heat being created by the engine(leaning out) or as simple as the fuel line boiling up near the heater box .The other thing heat related is spark ie /cond.or coil. these can fail under heat. how hot is the engine can you still handle the dipstick without pain. _________________ 2010 Bonneville record holder Type 2, 36hp
NHRA Divisional Sports Compact Champion
My You-tube video
http://www.youtube.com/watch?v=GJoq3MtsPmc
My National Dragster article
http://www.dragracecentral.com/DRCStory.asp?ID=231552 |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Fri Jan 31, 2014 3:35 am Post subject: |
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Fishynos, im hoping that it is because of too lean, when i retightened it fuel an mmo squeezed out of the gap, so this might fix the problem. didnt get to run it 2day on the highway but ill go for one in the morn.
acc, the engine around town runs at 175f an on the highway gets up to 250f this temp is a capillary run gauge from the dipstick hole. _________________ shiny paint doesnt make it worth any more |
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henry roberts Samba Member
Joined: February 24, 2003 Posts: 1275 Location: australia
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Posted: Fri Jan 31, 2014 11:54 pm Post subject: |
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sorted? |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Sat Feb 01, 2014 12:01 am Post subject: |
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Not sure Henry.
Ran this mornin for half hour on highway, only 80kmph cause of roadworks, but 220f with decklid shut n around 200f with it open. So not sure if it will be correct without running at 100kmph. _________________ shiny paint doesnt make it worth any more |
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earthquake Samba Member
Joined: January 10, 2008 Posts: 3984 Location: SANDY VALLEY, NEVADA
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Posted: Tue Feb 11, 2014 3:49 pm Post subject: |
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Do you have a good vent on the gas tank? I had this problem on a 76 1200 Honda Civic. It would suck a vacuum on the tank and it would not pull fuel to the pump. next time it does it, unscrew the fuel cap slowly and listen for a sucking sound.
Casey _________________ 74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Link to Kelly J. Nolte 3/20/53 - 11/6/08
https://time-zonelabs.blogspot.com/p/about-kelly.html
DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison] |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Wed Feb 12, 2014 2:44 am Post subject: |
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to tell the truth, my cap doesnt seal that well.
its a new gasket, but the outer casing spins so i cant put the cap on properly, so doest quite seal correctly anyway.. haha
someone also has mentioned that the seals in the oil cooler could be squished too much causing it to not have good flow. not a bad thought, something ill have to look at. _________________ shiny paint doesnt make it worth any more |
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vwhelmot Samba Member
Joined: May 04, 2006 Posts: 617 Location: united kingdom
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Posted: Wed Feb 12, 2014 6:18 am Post subject: |
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I have the same problem as you only after I shut the engine off to fill up with fuel or something like that. It then sometimes refuses to start and only a bump start will get it going again. I have tried everything I know to fix this problem as its more random than yours. All I know its that its definitely fuel related and not electrical. Its a vapour lock I think due to higher engine temps. |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Thu Feb 13, 2014 3:22 am Post subject: |
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vwhelmot wrote: |
I have the same problem as you only after I shut the engine off to fill up with fuel or something like that. It then sometimes refuses to start and only a bump start will get it going again. I have tried everything I know to fix this problem as its more random than yours. All I know its that its definitely fuel related and not electrical. Its a vapour lock I think due to higher engine temps. |
funny u say that, a friend had a 40hp judson that would do the same thing. mine. i have no problem with that tho mine will start after a highway run everytime!! _________________ shiny paint doesnt make it worth any more |
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Karly Samba Member
Joined: August 01, 2002 Posts: 641 Location: Australia
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Posted: Thu Feb 13, 2014 3:49 am Post subject: |
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hope you find the issue... mine also runs great on hwys as long as I don't turn off and try to restart straight away.
I can have problems starting mine if its been sitting for a long time as lack of fuel and then 6v struggles to get things moving! Driving daily its great though even in these 40 degree days its been ok (not doing hwy speeds though!), I do wedge the engine lid open and have set the oiler to higher than normal in hope it helps to keep things a little cooler. _________________ 1960 Beetle ''Heidi" daily driver
1964 Karmann Ghia project |
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vwhelmot Samba Member
Joined: May 04, 2006 Posts: 617 Location: united kingdom
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Posted: Tue Apr 22, 2014 12:46 am Post subject: |
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Did you fix this problem unlike me?! |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Tue Apr 22, 2014 3:00 am Post subject: |
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It seems to be running fine still and hasn't gotten too hot. I havnt taken it for a long highway run yet. (Over an hour) but seems ok, I've installed the Pertronix points back into it too.
So until I do over an hour run I won't have full confirmation yet, but I will let u know how it goes at 100km plus for a extended time _________________ shiny paint doesnt make it worth any more |
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vwhelmot Samba Member
Joined: May 04, 2006 Posts: 617 Location: united kingdom
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Posted: Tue Apr 22, 2014 6:14 am Post subject: |
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I can go for a drive say 25 miles and it runs perfect, no splutters, nothing. If I stop it sometimes and try to restart it , it will crank over and over till the cows come home and it wont even cough or fire whatsoever.
Ive tried squirting easy start down the carb, nothing
Ive opened the top of the carb to make sure there was fuel in the float chamber , which there was.
Ive removed the plugs which were not wet, but are sparking
Ive tried new condenser, points, starter, starter gearbox bushing, installed a yellow top modern gell optima 6v battery
Ive checked for air leaks around the manifold
Ive checked the tank for shit and venting
Valve clearences
Timing
The list goes on.
As you can see, it boils my piss and I cant trust the car . the only way it will start is by bumping it. Once it starts it smokes a little bit but not bad and will continue to run fine. I can then stop the engine with the key and it will restart straight away.
I think its either a faulty coil,(breaking down with the heat ,I run a Judson magneto coil) or a petrol evaporating problem.
Im going to hook up another coil and try that first.
GGGRRRRRRRRRRR!!!!!!! Ive had this problem for the last 9 years! |
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D-train Samba Member
Joined: January 08, 2007 Posts: 1455
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Posted: Tue Apr 22, 2014 1:27 pm Post subject: |
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That does sound really annoying, an for 9 years too!! Mine will strut again if I stop after a trip, but I have the back jacked too to get more air in, is yours?
When I didn't have it jacked it wouldn't start, so I jack it wait 5 an away it went again.
It seems to be a problem they have doin this
When mine starts to get too hot it makes a faint rattley sound or if it's under a bit of load then heats up.
I've tried to find the problem with that too, but can't find much. _________________ shiny paint doesnt make it worth any more |
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