Quote:
Originally Posted by wbailey
1. 185k miles
2. I swapped the valves after seeing it on another troubleshoot post, they fit real snug but I had them twisted because of the brackets and not bolted in.
3. code p0012 timing retard bank 1 became a p0022 timing retard bank 2.
Since it will come up here's a pic of the original tensioner before I replaced anything.
p0012 - Album on Imgur
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Thanks for the tensioner pic, looks like it was extended by 1-2 ratchet clicks but not likely enough to account for the original problem.
Your other pics showing timing marks do not indicate a stretched chain...this failure shows more timing retard on bank 1 than on bank 2 relative to the crank position, as there are more (worn) links acting on bank 1 given the longer distance from the crank. Let's take the chain and your installation off the table for now and assume they are correct, and that the static chain slack accounts for the retard you are seeing at the intake cams.
Swapping the OCVs was a good experiment and would seem to have indicated the OCV was the problem. But P0012 is still happening with the new replacement OCV, correct? And other than the check engine light, does the truck run well?
If P0012 is your only current symptom, here's what I'd do:
1.) Remove and clean or replace the OCV filter on bank 1 if you haven't already. Get a new crush washer from the dealer to ensure good sealing during reinstallation of the filter and plug. Report your findings when you remove the current filter.
2.) If the OCV filter doesn't correct the problem, I'd remove the intake cam actuator/sprocket and replace it. Not cheap for a Toyota part at $170 or so, but it can be done without removing the main timing cover (again). I did mine early in my project, had to buy a 17mm offset box wrench at Sears and a 24mm long open-end wrench to hold the cam without slipping off as the crescent wrench did.