removing the secondaries a compelling story
 

http://i1120.photobucket.com/albums/...n/DSC_0748.jpg

http://i1120.photobucket.com/albums/...n/DSC_0754.jpg


Scope view at point of discovery the awwww Crap moment!!!!!
http://i1120.photobucket.com/albums/...cope20view.jpg

Folks a lot of you know I am going through a motor rebuilding process. For those of you not in the know my car engine stopped dead in late May of this year almost at idle. Preliminary checks revealed Zero compression on Cylinder #2. I am sharing this as a documented failure on my 91 for the entire community’s info.

Here was the cause. One of the butterfly valves (#2 Cylinder)for the secondary’s snapped at the shaft screw point and fell into the head into the combuston chanmber and wedged a valve open. You can cleary see the fatigue at the screw point of the shaft. Scoring was seen on both the #2 and #4 pistons. This actually happened to me before on the other side of the motor when I received a CODE 61 Error. That time the parts did not go into the motor.

IMHO the debate is over. If you are doing any headwork or motor work remove the secondary system. Blades, Rods, actuators, reservoirs etc. Who doesn’t drive our car in full power anyway?

Just FYI and I hope this helps another brother out. This is a failure point but after 20yrs there are bound to be a few. Please heed my sage advise. GC

Re: removing the secondaries a compelling story
 

Correctamundo. We don't need no stinkin secondaries ! Yank them out and plug 'em up.

Re: removing the secondaries a compelling story
 

I also want to add my car was a daily driver with 122k Miles. No issues up to that point for almost a year the engine just died. It did restart but was obviously running like a drunken mule on 7 cylinders.

Re: removing the secondaries a compelling story
 

Thanks Cliff its all about helping out the membership. :cheers:

Re: removing the secondaries a compelling story
 

And Frank ought to know. BTW My heads are being ported, welded and Multiangled at this time. With Petes Intake Cams and a 380 bottom end with a Fidanza flywheel. OH Baby

Re: removing the secondaries a compelling story
 

Jez, that stinks Daryll! Pardon me while I reach for the bourbon to kill the pain.

Okay I got a question.......awe come on you knew this was coming...:p....:o

The only stress that I can identify is the suction caused by an intake stroke when the butterfly is closed......which is almost all the time if you live where I do....maybe I better start driving around in 2nd and leave it at 4th till I get to WV.....:dontknow:.....I mean how could this not happen, right?

signed:
the lost grasshopper ;)

Re: removing the secondaries a compelling story
 

Must be heavy throttle syndrome. ;)

Re: removing the secondaries a compelling story
 

:thumbsup: but I'm serious...what stress? It takes 8"Hg & they're open fully. They don't close until you back out enough that the ECM says okay, no more. The only stress has to be from the intake stroke when they're closed, right?

On another note: I do hope you get the worst case of permagrin that side of the great plains!:thumbsup:

:cheers:
Tom

Re: removing the secondaries a compelling story
 

Yank em!, I Lost maybe 1 MPG, picked up 11 RWHP, no more "extra stuff" to go wrong or worse yet blow the motor a GC found out

Re: removing the secondaries a compelling story
 

i'm assuming the 11hp was due to extra work like porting or something not just tossing the plates