10-03-2016, 12:16 PM
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#1 |
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Junior Member
Join Date: Jul 2013
Location: Lincoln,CA
Posts: 29
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leak down test
Have trouble with tdc the motor will rotate when air is turned on. 3 plugs installed in gear and brake on. tried bottom dc cant get valves shut. All help is appreciated thanks John
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10-03-2016, 12:19 PM
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#2 |
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Senior Member
Join Date: May 2010
Location: So Cal
Posts: 8,755
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Re: leak down test
What air pressure are you using?
Bob |
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10-03-2016, 12:20 PM
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#3 |
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Senior Member
Join Date: May 2010
Location: Central, IL
Posts: 3,968
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Re: leak down test
How much air are you supplying? Only need like 10psi. Set the parking brake hard in 3rd gear.
Take the plugs out as you wont be able to detect if it blows into the next cyl.
__________________
1929 Model AA - Need long splash aprons! |
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10-04-2016, 10:36 AM
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#4 |
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Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 4,091
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Re: leak down test
3rd gear is important! Overdrive is better.
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10-04-2016, 11:41 AM
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#5 |
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Senior Member
Join Date: May 2010
Location: Fresno, Ca.
Posts: 3,636
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Re: leak down test
I don't think 10 psi is enough, 75 -100 psi is more like it. I even leak engines down on
the engine stands,...you just need to make sure your on TDC... |
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10-04-2016, 12:05 PM
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#6 | |
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BANNED
Join Date: May 2010
Location: Bucks County, PA
Posts: 11,454
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Re: leak down test
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Quote:
Last edited by Mitch//pa; 10-04-2016 at 12:18 PM. |
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10-04-2016, 12:27 PM
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#7 |
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Junior Member
Join Date: Jul 2013
Location: Lincoln,CA
Posts: 29
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Re: leak down test
thank you all pulled head. Where are the most likely places to look for cracks in block and head thanks John
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