Benting valves w/o misshifting?

[Pump]

How possible is it and has it happened to anyone? Please tell your story or give input. I'm mostly concerned with the 2zz-ge, but any input is welcome. I'm just wondering. Thanks.

[ZBoyce]

Not a 2zz but i had some pretty damn bent valves due to oil starvation on my old mx-3, i had a trail leading up to my broken down car. It isn't that likely though, no one could really tell me how it happened, just that it did lol.. :crazy2:

[Chazm]

yeah, it happened to me....one day I went to go drive my car and I could hear ticking as I walked in front of it. I knew immediately when I opened my hood that I had bent valves, but I DIDN'T MISSHIFT!

All in all, Toyota voided my warranty because I had tampered with teh ECU and I traded it in for a Acura, 2 years later my roomate tells me that my other past roomate took my car for a joy ride one night and raced....ended up mis shifting! So technically "I" didn't misshift...

Hope this helps

[Blue Bomber]

I had a couple bent valves on my 2ZZ, one in cyl 1 and one in cyl 2. No noise or sound that indicated that it happened, just a CEL that popped up after my car stalled on the freeway one day. Nothing physically wrong with the engine besides the bent valves.

[SingleCamCivic]

Benting eh?

[DYI01]

Bending a valve is easy to do without misshifting. Just keep the engine at or around redline for extended periods of time. Eventually you will expereince valve float.

[nyoneway]

Originally Posted by DYI01

Bending a valve is easy to do without misshifting. Just keep the engine at or around redline for extended periods of time. Eventually you will expereince valve float.

Have a 110k miles and have enough top speed runs @ near the fuel cutoff @ 8300 to more than qualify for "extended period of time" and engine still ok. In my experience, this has been a very tough engine. You won't believe the abused I put it thru.

[DYI01]

Originally Posted by nyoneway

Have a 110k miles and have enough top speed runs @ near the fuel cutoff @ 8300 to more than qualify for "extended period of time" and engine still ok. In my experience, this has been a very tough engine. You won't believe the abused I put it thru.

Top speed runs dont really concern me. Ive dont top end runs as well and I hardly ever hold the RPM's at redline anymore than I have to. It doesnt take all that long for the car to redline 5th gear, and I really dont believe any bolt on GT-S can redline 6th gear ever. I dont see holding redline for anymore than 2-3 min at a time. What concerns me is on the track when you are downshifting TO redline and holding the RPM's steady up and down through the gears, over and over again. That type of contstant 'at or around redline' for extended peiods of time is what I meant.

[hephaestus]

I have to agree on the top speed runs.

But, I payed the price and I'm still paying.
You redline any car over and over, it's not good even a Celica with VVTLi and tight tolerances, with high compression, and aluminum parts.
Things are going to get rather noisy, loose and strange after a while of doing that, for lack of better terms. That's not including the weak stock suspension and transmission.
I always liked seeing people write our cars are meant to be reved.
You keep reving a car that could possible last 200,000 miles or more and you will see it having problems at 60,000 miles less or more guaranteed.