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rmhou(at)yahoo.com
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 Posted: Wed Feb 05, 2014 5:07 pm Post subject: 50 hours engine inspection |
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In the CJ's "Technical Specifications for Service & Maintenance", for 50 hours engine inspection on page 219, it says:
"Inspect the tightness for each cylinder with a pressure gauge. Its indication should be 3.5-6 kg./cm2 under a cylinder head temperature of 40-60"C."
Am I correct to assume it is not talking about a leak down test, but a compression test (like the one I used to do in my high school auto shop class)?
If I am correct, 3.5-6 kg/cm2 is 49.8-85.3 psi. I recall using 100 psi as an indication for a healthy car engine when doing a compression test. The 49.8-85.3 psi range seems to be very low. What am I missing?
Robin
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N13472(at)aol.com
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| Posted: Wed Feb 05, 2014 5:27 pm Post subject: 50 hours engine inspection |
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The Cj eng is LOW compression That’s why it can burn 70 octane fuel.
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell 541-297-5497
N13472(at)AOL.COM
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Robin Hou
Sent: Wednesday, February 05, 2014 5:07 PM
To: Yak List
Subject: 50 hours engine inspection
In the CJ's "Technical Specifications for Service & Maintenance", for 50 hours engine inspection on page 219, it says:
"Inspect the tightness for each cylinder with a pressure gauge. Its indication should be 3.5-6 kg./cm2 under a cylinder head temperature of 40-60"C."
Am I correct to assume it is not talking about a leak down test, but a compression test (like the one I used to do in my high school auto shop class)?
If I am correct, 3.5-6 kg/cm2 is 49.8-85.3 psi. I recall using 100 psi as an indication for a healthy car engine when doing a compression test. The 49.8-85.3 psi range seems to be very low. What am I missing?
Robin
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Sat Feb 08, 2014 5:40 am Post subject: Re: 50 hours engine inspection |
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you read correctly.
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