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Leakdown test
What are the chances of bending valves during a leakdown test? motor is a 73RS.
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11-30-2001, 11:38 AM
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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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None, if the engine was running correctly before (no bad tensioners, chain ramps, etc.) and the cams and timing chains are left undisturbed. Did your engine get damaged?
 Jim
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11-30-2001, 11:47 AM
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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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What can happen is a piece of carbon can break loose (taking spark plug out and installing leakdown test rig can cause this) and keep a valve from closing properly and thereby producing poor leak down numbers.
 Jim
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11-30-2001, 11:50 AM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,474
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what the heck kind of a test are you running on it?
__________________
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11-30-2001, 11:58 AM
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leakdown
thanks for the input! motor runs strong. it's in my daily driver 72S. a friend of mine is interested in the motor pending a leakdown or compression test.
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11-30-2001, 01:10 PM
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leakdown test
What I was worried about is if the pressure is applied during the leakdown test, is there a chance that the crank can move against the normal direction of rotation and bend valves? thanks.
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11-30-2001, 01:19 PM
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Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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The pistons and valve train move together in synchronization, forward or backward, nothing will hit as long the valve train is intact and assembled correctly.
Jim
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11-30-2001, 01:28 PM
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