Valve's broken. - Toyota Yaris Forums

Yaris Hilton · 09-07-2010, 03:20 PM

Oh, one more thing. The light reciprocating weight of the valve train in these engines is an advantage, allowing less valve spring pressure. Increase the spring pressure and you increase wear on the lifters, cam lobes and valve seats.

Bluevitz-rs · 09-07-2010, 07:49 PM

Quote:

Originally Posted by Yaris Hilton

Oh, one more thing. The light reciprocating weight of the valve train in these engines is an advantage, allowing less valve spring pressure. Increase the spring pressure and you increase wear on the lifters, cam lobes and valve seats.

Not to mention the increase of friction and loss of efficiency.

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09-07-2010, 03:20 PM	#1
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Oh, one more thing. The light reciprocating weight of the valve train in these engines is an advantage, allowing less valve spring pressure. Increase the spring pressure and you increase wear on the lifters, cam lobes and valve seats.