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1955-57 272 not starting

Posted By wasabi255 12 Years Ago
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wasabi255
Posted 12 Years Ago
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Hitting on all eight cylinders

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Ok

New on here ... Hear me out I picked up a 1956 customline that I'm trying to get running / slow restore for my dad

Pulled the seized 292 out that was I. There and put in a "it ran" 272 so numbers matched... Cleaned it al up and gasket kitted the motor... With shit head gaskets it pulled 30psi all cylinders placed back in car and wired everything up had some issues with distributor points but got spark... Pulling 70~ psi all cylinders. Its timing seems right per timing light manually feel for TDC and checking marks... Cranks over and sounds good cranking speeds up like it wants to fire and then back to normal cranking...

15486372 firing used
New plugs & wires
New oil
Carb rebuilt but using starting fluid
Psi 70~

Will try and post video of what it's doing
stuey
Posted 12 Years Ago
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Hi there wasabi
welcome
where are you?
70 psi seems low ,should be around 160psi for 2barrel or 155 for 4 barrel
firing order is correct cylinder numbering is (facing forward from drivers seat) 1 2 3 4 right side from the front of engine and 5 6 7 8 front to rear left side
i'm sure others on this site who are a lot more capable than myself will soon chime in
good luck
stuey
UK
MoonShadow
Posted 12 Years Ago
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Counter clockwise firing order? Did you check compression with all plugs out and the carb open? That will give you a more accurate reading. If compression is that low it may be very difficult to start. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire
The Horvaths
Posted 12 Years Ago
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It is best to open the choke when running a compression test.
62f250
Posted 12 Years Ago
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My guess is the compression is to low but double check firing order as the other guys have said see what happens

1962 f250 currently heartless
1961 country squire 292 3 speed
1963 galaxie 390 powered
1976 f250 4wd 390 powered
wasabi255
Posted 12 Years Ago
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Hitting on all eight cylinders

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I'm in the US in Idaho...

Counterclockwise is used on distributior

Check compression with carb off and plugs in... Can do it the otherway tonight....

Per the video she is so close to running
wasabi255
Posted 12 Years Ago
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this should work
https://www.youtube.com/watch?v=0qOUrck5aA8&feature=youtube_gdata_player
wasabi255
Posted 12 Years Ago
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So I have 40 to 90 psi all over 90-40-40-40 and 60-40-60-40 ??? No plugs throttle open...

Why would this be all over the place when I had solid 30psi on old head gaskets ????


And is this spinning enough to get oil to help seal the pistons up... My thought is the rings might be a little froze until it runs for a bit but I dono anymore

What you guys think from that video
stuey
Posted 12 Years Ago
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sounds like its cranking good
i still think those pressures are low
http://forums.y-blocksforever.com/Topic67162.aspx?Keywords=stuck+rings#bm67224
read the response from T Eaton. maybe a spoonful of ATF(medicine ) will do the trick
stuey
Ted
Posted 12 Years Ago
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The rule of thumb for compression readings is that they all be within 10% of each other. Your numbers far exceed this so you’ll need to dig deeper. Putting air on the cylinders will help determine if you have valve issues or piston ring problems at the cylinders. Even an engine with 8.0:1 cr will have 130 psi pressure at the cylinders during cranking so you’re numbers need to be higher. A consistent 90 psi across the board should at least get you cranked up though.
..
Here’s the link to the post on pressurizing the cylinders with oil to help free up the rings. ..
http://forums.y-blocksforever.com/FindPost67168.aspx


Lorena, Texas (South of Waco)




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