MX-3.com

Just a curiosity poll really.. just trying to see if there is a common denominator for the ZE engines that have broken valve retainers and have sucked valves as a result. Also if you or someone has additional information about the engine (Like when & how it went down) if you could post it in this thread as well.. that would be awesome. If you know someone on Probetalk or MX-6.com or elsewhere that had this happen.. please steer them to this thread Thanks

Tunes67

I had the problem.

2-crack retainer
both are on the intake side

happened while misshifting
one drop instantly
the other one broke while I took the head off !!

IIRC both happened on the front head (left one)

Which engine did you have Steve?

Tunes67

Tunes67 wrote:Which engine did you have Steve?

Tunes67

klze with originally long neck intake and kl31 cams)

That is basically what I've heard too, mis-shifts or over revving are when they break retainers.

but thats where i'm curious along with tunes, is it just in the straight necks or is a problem that lies in all ZEs PAT LETS GO RIPP APART OUR ZE's, ::slaps self in face:: no no no we will not tear apart the motor unless we are putting in better parts

PATDIESEL wrote:That is basically what I've heard too, mis-shifts or over revving are when they break retainers.

I know some dropped them while driving out their drive way too.

Although possible, did those people by chance have a history of being hard on their motors?

I dont think i have yet heard of anyone dropping a valve on the kl-01 cammed zes. Supposebly they are the exact same valve train? Im swapping out the retainers anyway once i swap the cams. The car i rarely drive anyway. I know it happens to most people that over rev their car alot. Ive had mine for 10 months, a few missed shifts and im still good (crosses fingers)

kl31 cammed straight neck with curve neck swapped to it, miens droped ar about 4000rpm in 2nd gear. I have never overeved mine either.

the motor now has Ferrea valve springs, retainers and locks and 5angle valve grind. I love it

hey mxeautozam, for how long did you have your engine before this happened?

mx3autozam wrote:I have never overeved mine either.

lmao i guess never is a few times hittin rev limiter a day?

fieromx3 wrote:

mx3autozam wrote:I have never overeved mine either.

lmao i guess never is a few times hittin rev limiter a day?

haha, qtf

7500 is where i shift at!

mx3autozam wrote:7500 is where i shift at!

why?

doesn't the powerband drop after 6600?