Holley 600 Swap - Questions

Discussion in 'Technical' started by Elephant, Oct 10, 2015.

  1. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,709
    Likes Received:
    2,429
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    I didn't change a thing for mine, fully opens with hookup pictured in earlier post...
     
  2. Elephant

    Elephant Member

    Joined:
    Dec 8, 2013
    Messages:
    130
    Likes Received:
    5
    Trophy Points:
    36
    Location:
    Katy, TX
    Vehicle:
    1977 Maverick
    Well I got the right heater hose fitting on today and she fired up! Running way high on idle to where the idle screw can't bring it down so I'm sure the timing is way off. Before I got to check that I found coolant pouring from the thermostat housing gasket. Is it possible the system is overfilled? I filled it up warm to about 2" below the radiator cap and I have no overflow tank, just that hose routed to the ground. I would have expected anything to vent through that but it chose to blow out the gasket instead...
     
  3. Crazy Larry

    Crazy Larry Member

    Joined:
    Jul 16, 2005
    Messages:
    3,557
    Likes Received:
    603
    Trophy Points:
    287
    Location:
    Wichita, Kansas
    Vehicle:
    '73 Maverick 2-door, 302, manual trans
    You don't have a good seal on the thermostat housing. If it was over-filled, it would puke from the vent.
     
    Static likes this.
  4. Elephant

    Elephant Member

    Joined:
    Dec 8, 2013
    Messages:
    130
    Likes Received:
    5
    Trophy Points:
    36
    Location:
    Katy, TX
    Vehicle:
    1977 Maverick
    Makes enough sense. Will replace that tomorrow and work on the kick down. I got that bushing installed for the throttle cable and it feels like it's in a better position. I'm just excited it fired up on the first try.
     
  5. dyent

    dyent Member

    Joined:
    Jan 29, 2012
    Messages:
    1,178
    Likes Received:
    455
    Trophy Points:
    258
    Location:
    vancouver bc
    Vehicle:
    1973 Comet 2 dr., 302 w/AR aluminum heads, Toploader 4 spd, 9" Trac-Lok w/3.70
    You can also try one of those "O-ringed" thermostat housings, mine was a Mr. Gasket, never had a problem in
    25 years of use. Here is one listed with Summit Racing.......

    http://www.summitracing.com/int/parts/spe-4232/overview/
    David
     
    jasonwthompson and Crazy Larry like this.
  6. jasonwthompson

    jasonwthompson Member

    Joined:
    Mar 25, 2012
    Messages:
    1,358
    Likes Received:
    468
    Trophy Points:
    196
    Location:
    Carrollton TX
    Vehicle:
    72 Comet
    It will initially run high (fast idle) on startup due to the choke. The fast idle adjustment screw is different than the idle adjustment screw.
     
    Krazy Comet likes this.
  7. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,709
    Likes Received:
    2,429
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    And a bitch to access...
     
    jasonwthompson likes this.
  8. Elephant

    Elephant Member

    Joined:
    Dec 8, 2013
    Messages:
    130
    Likes Received:
    5
    Trophy Points:
    36
    Location:
    Katy, TX
    Vehicle:
    1977 Maverick
    Well I got a Felpro thermostat housing gasket, new thermostat (again) and some permatex 518 to seal the gasket. Putting that housing back on was the worst task I've ever done on a car and I'm sure I have permatex all in my cooling system now. Oh well. I quit for the night after losing the tiniest of c-clips from inside my distributor. Will try again tomorrow...
     
  9. Crazy Larry

    Crazy Larry Member

    Joined:
    Jul 16, 2005
    Messages:
    3,557
    Likes Received:
    603
    Trophy Points:
    287
    Location:
    Wichita, Kansas
    Vehicle:
    '73 Maverick 2-door, 302, manual trans
    Wow. I don't know what you were doing to make the task so difficult, but removing & replacing that housing is a really easy thing to do. it's only 2 bolts & 2 hose clamps, and you don't need much RTV sealant --- certainly not enough to get into your cooling system.
     
  10. Elephant

    Elephant Member

    Joined:
    Dec 8, 2013
    Messages:
    130
    Likes Received:
    5
    Trophy Points:
    36
    Location:
    Katy, TX
    Vehicle:
    1977 Maverick
    Heh. What I was doing was making it harder on myself by trying to do it without removing the distributor again. I did it to myself! :coco:

    I was also certainly exaggerating. Replacing the 8 broken spark plugs in my 5.4 was way harder!
     
  11. Crazy Larry

    Crazy Larry Member

    Joined:
    Jul 16, 2005
    Messages:
    3,557
    Likes Received:
    603
    Trophy Points:
    287
    Location:
    Wichita, Kansas
    Vehicle:
    '73 Maverick 2-door, 302, manual trans
    Removal of the distributor is totally not necessary.
     
  12. Elephant

    Elephant Member

    Joined:
    Dec 8, 2013
    Messages:
    130
    Likes Received:
    5
    Trophy Points:
    36
    Location:
    Katy, TX
    Vehicle:
    1977 Maverick
    Is it possible that your distributor doesn't have the giant vacuum advance assembly on the front? That's really what gets in the way not allowing me to fit more than 2 fingers on that lower bolt.

    Either way, I can't get this thermostat housing to stop leaking from the bottom. 2 gaskets and permatex 518 gasket sealer on the second, both bolts tight, it still spits out pretty hard. I cleaned both surfaces with a razor blade until smooth and then carb cleaner until they passed the white glove test. Any other thoughts?
     
  13. dyent

    dyent Member

    Joined:
    Jan 29, 2012
    Messages:
    1,178
    Likes Received:
    455
    Trophy Points:
    258
    Location:
    vancouver bc
    Vehicle:
    1973 Comet 2 dr., 302 w/AR aluminum heads, Toploader 4 spd, 9" Trac-Lok w/3.70
    Possible that one or the other mating surfaces could be warped, one other option, remove and re-clean as you did before and use RTV sealer (blue is compatible for anti-freeze) w/o gasket. Let it really set up overnight and try again. There is also Permatex Black Gasket maker that you can use, alittle messy, but works really good too! Or you can purchase one of those "O-ring'd" thermostat housing that I mentioned in earlier post, you'll never have to worry about any leaks again and can be removed quite a few times before new o-ring is required. You might want to check that your bolts are not bottoming out into the intake manifold too soon.......good luck!
    David
     
  14. Hotrock

    Hotrock Rick, an MCCI Member Supporting Member

    Joined:
    Oct 27, 2012
    Messages:
    1,473
    Likes Received:
    718
    Trophy Points:
    313
    Garage:
    1
    Location:
    Munroe Falls, Ohio
    Vehicle:
    1972 Mercury Comet, 1997 Mustang Cobra, 2019 Ford Edge ST
    Are you having difficulty keeping the thermostat in the pocket of the housing during installation? Could it have slipped down between the housing and the manifold surface causing the leak? I have never used gasket sealer for a thermostat installation. If you are having difficulty keeping the thermostat in the pocket of the housing I have a slick trick I came up with that makes the installation easier. Let me know if that is an issue.
     
  15. Elephant

    Elephant Member

    Joined:
    Dec 8, 2013
    Messages:
    130
    Likes Received:
    5
    Trophy Points:
    36
    Location:
    Katy, TX
    Vehicle:
    1977 Maverick
    Thanks but I used the rubber band trick to keep it in the pocket until the bolts were torqued. No dice. Going to try with no paper gasket next but not today
     

Share This Page