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#11 |
Junior Member
Join Date: Oct 2014
Posts: 42
Likes: 0
Liked 9 Times in 8 Posts
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I have a OTC also ,works well and would recommend it.
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#13 |
Junior Member
Join Date: Dec 2009
Posts: 52
Likes: 17
Liked 17 Times in 9 Posts
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I bought mine off a Cornwell truck quite a few years ago. I use mine after every race on both car as part of my routine maintenance, and it's been perfect. I would buy another one if I needed too.
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#14 |
Junior Member
Join Date: Nov 2008
Location: Cascade, CO
Posts: 48
Likes: 22
Liked 7 Times in 5 Posts
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Turns out my brother has a Matco tester that I will be using. Do I need to warm the motor before running the test? It's been parked in my garage for about 3 weeks without being started. Also, what numbers are acceptable? My motor is 447 C.I. with 14.3 compression.
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#15 |
Member
Join Date: Jun 2007
Location: NJ
Posts: 348
Likes: 55
Liked 126 Times in 60 Posts
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You can leak a motor cold or hot. Just do the same thing each time. A warm motor should leak alittle better the cold. If doing cold just spin the motor over a few revolution to make sure you have some oil on the walls. Certainly under 10% mine usually leak 3 to 5% when fresh cold
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#16 |
Member
Join Date: Jan 2009
Location: Las Vegas, NV
Posts: 180
Likes: 9
Liked 41 Times in 30 Posts
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Had an OTC for years with no issues
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#17 | |
VIP Member
Join Date: Mar 2007
Posts: 2,348
Likes: 555
Liked 1,699 Times in 519 Posts
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![]() Quote:
__________________
Mike Pearson 2485 SS |
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#18 |
Member
Join Date: Mar 2021
Posts: 124
Likes: 0
Liked 51 Times in 30 Posts
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whats normal leak down on a new motor? does it matter what ring package?
thanks mike Last edited by garyc; 01-31-2022 at 04:49 PM. Reason: previous post |
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#19 |
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Join Date: Mar 2021
Posts: 124
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Liked 51 Times in 30 Posts
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most times leak down was used to find a dead cylinder
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#20 |
VIP Member
Join Date: Jun 2006
Posts: 3,366
Likes: 389
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definitely less than 10% and if you have gapless end rings less than 5%---if its a tight motor AND NEW never started you are going to see about 3-4 to maybe 5 - 6 %---watch for variations between the cylinder readings especially those cylinders that are next to each other-- not small ones like a few percent but big differences like 10-30%--FED 387
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