Join Date: Jan 2010
Location: Colorado Springs
Once the rocker arm pin slides under the slipper pad there should be a measurable "lash" in the system. I am just wondering if this is part of the problem but I don't know how one would go about trying to measure it.
There's a good bit of add'l plunge once the locking pin is engaged.
Coincidentally I just checked this the other day while trying to diagnose an absolutely crazy high cam mechanical issue. I was able to lock all the rocker pins for the high cam with air pressure. There is a lot of travel in the pad when the pins are engaged. The pads appear to move as much as 0.10" when the pin is engaged, though this is only a guess I did not measure it. I can measure it next time I run this test.
The procedure is to remove the cams from the engine as well as the oil pressure sensor from the OCV housing, the one above the flywheel. Replace it with an air line fitting, it's a standard pipe thread. Reinstall the double cam cover (the one on the timing side of the cams) to cover the two oil ports. There is one more oil vent port to temporarily plug or cover with your finger, then you can apply 60 psi to the rockers. This locks all the pins in place and allows you to push down on the pads.
The issue with my engine was that two of the exhaust rocker pads would travel all the way down even when air pressure was applied.
2006 Chrome Orange Elise - 6.3 lbs/hp - MP-62 Supercharger, 3.2" Pulley, BOE Fast-Works Tune, Ported Head, MWR Stage 3 Cams, Penske Suspension, Cup Air Box, PPE Header with Catless Custom Twin Tip Exhaust, Fidanza Flywheel, ACT Clutch, MWR Water Pump + Alternator Pulley, 1900 lbs
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Last edited by ERP; 03-09-2017 at 10:27 AM.