SpoonFedHatch

ok i was reading in an earlier post that most aftermarket valves will shatter if valve float happens....then i read that OEM honda valves will not shatter, but rather bend if knocked.....hmmm.....if this is true, then what type of forging/material are most aftermarket valves made of that would cause them to shatter upon impact, and not just bend?
[edit] btw, i'm talking about intake/exhaust valves


[Modified by SpoonFedHatch, 8:47 PM 12/5/2002]

SpoonFedHatch

bump

JDMvtecDRAGSTA

ive never heard of this kind of case happening ive only heard of bent valves happening whether its stock or aftermarket valves

ablangc

I have never heard of valves shattering but I have heard of camshafts breaking but that was due to improper installation!

BlackDeuceCoupe

Valves do not shatter; they bend and break. Pistons shatter when the valves bend and break. Hope this clears things up...

Russ713

iTrader: (1)

these are pics of what remains of my stock valves after floating the **** out of them.

close up under head


Another close up under head



for the rest of the pics, click the link in my sig.

SpoonFedHatch

holy **** that's bad.....yeah i was reading a post in the lude' forum and somebody posted that most aftermarket valves will shatter if floating and impact the piston....i have ALWAYS known that valves will bend, but i didnt know if it was possible to shatter....thanks for clearing that up

Russ713

iTrader: (1)

yeah, just click the link in my sig. You'll see where remains of the valves, seats, and guides mated with the pistons. One of the valve heads is permanently bonded to the second piston in the last pic.

BlackDeuceCoupe

Been there - done it!

I sucked an intake valve a while back, but HAD to get to work, so I drove it for about 5 miles with the valve head floating around in the cylinder. Finally, it jammed itself sideways in the port. Made hella racket before it wedged itself in place, but NEVER shattered.

Anyway, valves don't shatter. They bend and break, but pistons shatter. Here's a picture of that (not my car):



Nitrous bottle ran dry in the middle of a run...

double0Si

Ouch, some of these pics are just painful.

Honda valves are less likely to break than most aftermarket valves. Honda valves usually just bend, instead of the hat breaking off and then totally trashing the piston and combustion chamber with the hat bouncing around in there. You can see the difference in the pictures of the one cylinder that just bent and the others that broke. There are always exceptions though.


[Modified by double0Si, 6:23 PM 12/7/2002]

nerces

you guys OEM honda valves are 2 peaces. if you take your honda valve and put it in a vise grip and tap it softly it will break in half

nerces

your right the pistons are what shatter not the valves they just fall apart real easy lol