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Smallblock454 · 07-30-2015, 09:41 AM

Vario Cam is adjusted by chain lenght - so we don't talk about Vario Cam Plus, which works competely different.

Vario cam is not comparable to VVTi from Toyota or other cars. It's a Porsche specific design.

Vario Cam only adjusts cam timing on intake valves, not on exhaust valves. The solenoids that adjust chain lenght are electronically adjusted. The full adjustment only works at high rpms at approx. above 5.000 rpms.

So the Vario Cam theory doesn't work on that.

So what could cause that. For example if the plastic glider on the chain ramp is broken. So the timinig could be OK now, but when plastic parts came between chain and gear timing was wrong and caused the damage on the valves.

The only way is to tear down the engine and check everything.

Regards from Germany
Markus

07-30-2015, 09:41 AM	#16
Smallblock454 Registered User Join Date: Jun 2014 Location: LB, Germany Posts: 1,456	Vario Cam is adjusted by chain lenght - so we don't talk about Vario Cam Plus, which works competely different. Vario cam is not comparable to VVTi from Toyota or other cars. It's a Porsche specific design. Vario Cam only adjusts cam timing on intake valves, not on exhaust valves. The solenoids that adjust chain lenght are electronically adjusted. The full adjustment only works at high rpms at approx. above 5.000 rpms. So the Vario Cam theory doesn't work on that. So what could cause that. For example if the plastic glider on the chain ramp is broken. So the timinig could be OK now, but when plastic parts came between chain and gear timing was wrong and caused the damage on the valves. The only way is to tear down the engine and check everything. Regards from Germany Markus Last edited by Smallblock454; 07-30-2015 at 09:45 AM.