Just curious what the causes of blow by are, I've heard its from piston seals to head gaskets to valve seals...and any combination of the three, anybody that has had blow by or know what its from please let me know what you think...BTW I HAD a stock head gasket and never touched anything in my motor. Steve.

 

me, got it from a crak piston ring or ringlands, I have yet to find out...

compression was 220 220 90 220

 

does that mean that the only way you get blow by is from piston damage? Just trying to narrow down what is going wrong...

 

blow by in hondas is normal. to a certain extent

 

Here is a link that gives some info...

http://www.salemboysauto.com/faqs/faq-33.htm

Hope it answers some questions for you.