It is the leakage of compression gasses past the piston rings.
Blow by is caused when combustion gases get past the piston into the crank case. The cause will be piston, rings, or cylinder wall.
Blown is the past participle for blow. The past tense of blow is blew.
The simple past tense of "blow" is "blew."
The past participle of "blow" is "blown."
The past tense of "blow" is "blew," and the past participle is "blown."
The past participle of "blow" is "blown." For example, "The wind has blown all night."
How do you blow a engine turbo.
Blow by is the fumes that are produced inside the engine from the compression that slips past the piston rings as they wear out. The worst the ring get the more compression (blows by) the rings. Which is Where the Quote comes from. Steve @ mstrwrnch@yahoo.com
Past tense - blew (simple) & blown (past participle) Present tense - I/you/we/they blow. He/she/it blows. The present participle is blowing. Future tense - will blow.
"Blew" is the past indicative of "blow", and the past participle of "blow" is "blown".
"Blew" is the past tense of "blow".