Monday, May 2, 2011

[Honda-C70] initial engine sound

 

Hello everyone.
For 15 to 30 seconds after starting, engine gives out high pich jingling sound. Then all of a sudden this gets muffled, due to oil reaching all parts.

Is the initial jingling period the time when there is most wear occuring in the engine? From where does this noise originate? From ring pistons or timing chain?

New engines, which use thinner oil, have this sound coming all the time. But in my engine, the thick oil completely stops this sound after 30 seconds or so.

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Recent Activity:
C70 Passport Not Running Right?
1970-73 C70 Honda Service Manual: http://tinyurl.com/6ebwtw
1970-73 C70 Troubleshooting Guide:
http://tinyurl.com/6ebwtw (scroll to sec.7.1 page 101.jpg)
1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
1980-81 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec.18-1 page 170.jpg)
1982-83 C70 Troubleshooting Guide:
http://tinyurl.com/hu42c (scroll to sec. 20-28 page 205.jpg)

1980-81 C70 Maintenance Schedule: http://tinyurl.com/z4zn6
1982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c

More resources for C70 Passports and Cubs:
http://www.shlaes.com/Vehicles/Scooter.htm
http://www.velodrome.com/HondaC70/HondaC70.html
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