exhaust valves

[19907mgte]

my vavles on that side have 10 times as much build up on them what causes that? and is rough build up

 

[Suprapowaz!(2)]

Carbon build up. What brand of gas do you use? You can pick up some BG44K and see if that works. http://www.bgprod.com/products/fuelair.htmlhttp://www.bgprod.com/products/fuelair.html It's a little pricey.
There also Berryman's B12. Some people use Seafoam. Do some research on each one before you use.

 

[19907mgte]

yea but it pitted the valves only on the exhaust side and there was a shit ton of build up had some carbon but there was white on it and it was really rough

 

[Poodles]

Somewhat normal. Usually the valve stem seals fail on that side first because of the heat and oil leaks down causing the buildup.

 

[metaphysico]

clean fresh air with gas comes in on the intake valve side, they have gas constantly cleaning them off and cooling them. Burnt fuel and air go out the exhaust side, so all the products of internal combustion are going out the exhaust side and the heat too. Not much worry about the intake valves getting too dirty due to the fact they have gas and cold air shooting across them, well that is until all the auto manufactures switch to direct injection spark ignition systems, then god save us all.