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1955-57 272 not starting

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

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Alright guys...

Did the ATF trick and rechecked the compression 90psi in most cylinders... Hooked up gravity feed tank and cranked over and everything started on fire... Found leak in carb... Took carb off recleaned again and placed on car....

Tried one last time she cranked over and I pumped her a few times and she fired up and started idling like she wanted to be alive again... Thanks for all your help so far I will be back and share the knowledge I have gained preserving my piece of the past thanks again

Spencer
The Horvaths
Posted 12 Years Ago
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Altitude will inversely affect the readings.

Edit - and Ted reminded us that a misaligned or badly worn timing chain could lower compression readings.
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)


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
wasabi255
Posted 12 Years Ago
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Hitting on all eight cylinders

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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
wasabi255
Posted 12 Years Ago
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Hitting on all eight cylinders

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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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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
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
The Horvaths
Posted 12 Years Ago
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It is best to open the choke when running a compression test.
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


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