The resullt of valve float: a painful discography
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The resullt of valve float: a painful discography
Well, as some of you know I`ve had some recent troubles of cam breakage, timing issues, and just flat out bullshit. I ran Crower 402`s and managed to make several pieces out of them:
During that little venture I bent all intake valves. They were replaced with (thank God they were stainless, and we`ll get to that lil significance later), new valves that were .5 over stocks.
Everything is put back together, everything seems ok, although I never really had a concrete answer as to WHY the cam broke in the first place, I settled for the anser you and everyone else did: Crower did a bad grind. Fine, they say the new cams are better and gave me new ones. Free.
Well last night I was rollin` along, goin thru the gears and all the sudden...cling cling cling...etc. the car died. There was no starting back up, just an awful sound.
I thought I busted another cam! Damnit! Well after a compression test I found 180+ on cyl 4, 180+ on 3 and 0 on 2 and 65 on 1. I looked through the sparkplug hole and I could actually see the damn valve. I knew I was in deep ****.
I proceeded to tear the engine down and found this:
along with a few bent exhaust valves.
I took the springs to my machine shop and and the look on the guys face after he tested it was downright scary. The spring actually BROKE!!!
That would explain the reason I busted a cam. That would explain EVERYTHING. Valve float is the death of any motor, or in my case, 2 deaths in one motor
That`s my tech lesson for today
[Modified by sinister, 11:38 AM 4/4/2003]
During that little venture I bent all intake valves. They were replaced with (thank God they were stainless, and we`ll get to that lil significance later), new valves that were .5 over stocks.
Everything is put back together, everything seems ok, although I never really had a concrete answer as to WHY the cam broke in the first place, I settled for the anser you and everyone else did: Crower did a bad grind. Fine, they say the new cams are better and gave me new ones. Free.
Well last night I was rollin` along, goin thru the gears and all the sudden...cling cling cling...etc. the car died. There was no starting back up, just an awful sound.
I thought I busted another cam! Damnit! Well after a compression test I found 180+ on cyl 4, 180+ on 3 and 0 on 2 and 65 on 1. I looked through the sparkplug hole and I could actually see the damn valve. I knew I was in deep ****.
I proceeded to tear the engine down and found this:
along with a few bent exhaust valves.
I took the springs to my machine shop and and the look on the guys face after he tested it was downright scary. The spring actually BROKE!!!
That would explain the reason I busted a cam. That would explain EVERYTHING. Valve float is the death of any motor, or in my case, 2 deaths in one motor
That`s my tech lesson for today
[Modified by sinister, 11:38 AM 4/4/2003]
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#8
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Re: The resullt of valve float: a painful discography (monicle)
No over revving here, and I`m using crower springs...everything was to spec. I was in the clear
#12
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Re: The resullt of valve float: a painful discography (sinister)
Your valve looks like a mushroom.
But wasn't there some talk about the LMA's needing to be Type-R's....something about binding in the LMA spring?
But wasn't there some talk about the LMA's needing to be Type-R's....something about binding in the LMA spring?
#13
Re: The resullt of valve float: a painful discography (EE_Chris)
now that is scary.... i got the stage 2 crowers and was just waiting for all the other parts. now i am very hesitant with my project!
#14
Re: The resullt of valve float: a painful discography (HybridHackBatch)
hmmm i thought because we have OHC style motors that valve float wasnt possible, i thought it was a push rod thing?? i could be mistaken
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Re: The resullt of valve float: a painful discography (sinister)
holy ****!!!!!!!! what kind of springs were you running with your crower setup??? was it all from crower??? portflow??? skunk2??? please do tell...might help others here...thanks
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Re: The resullt of valve float: a painful discography (civictypenos)
what cuaes the valve to float,springs not keeping up with the cam?
A VW friend once said, "So, damages aside, it's like VTEC?"
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Re: The resullt of valve float: a painful discography (Loco Honkey)
what we think happened with mine was, the cams were lofting the valves/retainers just enough so that the retainers were just barely hitting the valve guides at hight rpm. Eventually this "mushroomed" the tops of the guides to the point that it stuck/held the valves in the cylinder and...BANG! Big mess. Installed height off, maybe?
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Re: The resullt of valve float: a painful discography (ProEater)
I did some valve floating myself about a week ago. Mine valves were nowhere near as bad as yours (I just SLIGHTLY bent cylinder 3 exhaust valves). Good luck with everything and sorry to hear about your continuous bad luck with your valvetrain