Billman250

this one is real bad....puts a new twist on things....

I just did car#6 2 weeks ago, this is getting rediculous.

stay tuned for the whole story and pics...

FISH22

wow

jyeung528

please also inform us of the cause, etc.

Jsmply

Hopefully not an AP2! LoL . . . I'm still thinking your theory is right on the AP2's. Thanks for all of these updates Billman, they are very valuable to a lot of us.

Billman250

Ok...2002, about 50k, 2nd owner.

Damage list:

-8 broken Intake retianers
-1 broken Exhaust retainer
-1 damaged camshaft (intake) this is a result of the retiners being so high up, they made contact with the roller rocker. The hardened particles from the retainer get transfered to the cam and etch it away like sandblasting.
-3 damaged intake springs. Razor sharp edge around the tops, due to rocker contact. Also due to retainer walking, due to insufficient spring pressure, due to cracked retainers that have walked upwards.

This car did have some SMALL symptoms. Idle would drop very low, and almost stall. It would also shudder at idle. Other than that, it ran fine and had no noise. This is not the typical "idle low/shake/idle return to normal". This car's idle was low, about 500, and was a little shaky.

This car is the 7th car I've found broken intake retainers during routine maint out of 370 s2k's, give or take a few.

THIS IS THE FIRST CAR I HAVE SEEN WITH A BROKEN EXHAUST RETAINER. All exhaust retainers I have seen (about 3000, 370 X 8) were never broken till now. Not even the slightest bit of recession. However, one exhaust retainer had SOMEWHAT recessed keepers. Sure enough I pull it and it was broken. The other 7 were fine. So I did new F22 retainers on the intakes and F20 on the exhaust. One used cam, 3 used springs.



Pics in a bit....

Billman250

Broken retainer. You can clearly see the inside wall of the retainer, where the keepers are supposed to be sitting/covering.


another...in this pic, look at the shiney ring around the outside of the retainer, and the spring. This is from contact with the roller rocker


etched cam lobe on intake cam


another etched lobe on intake cam

Billman250

The first car I found was Jacko. His was the worst, till this car.

Tyraid2K

ouch
you need to travel around the country inspecting S2KI members vehicles!

Billman250

Back to his symptoms....also had a tight throttle cable, holding it open about 5%. Maybe someone tried to fix his low idle with this "rig"

As of now all symptoms are gone.

silvers2k01

Nice work! thanks for the posts