2009 Base AWD 6cyl 2GR-FE w/ tow prep 210,000 original mi. Bought new, dealer serviced for first 7 years. No major issues until had Oil cooler rubber hose fail/upgraded by dealer @145k. Has metal vvt-i hoses.
One fine day after driving approx. 45 min, then parking for about 30 min. Started up to hear a loud ticking noise in valve train. Drove it briefly. Ticking didn't stop. Read out codes that said something about cam timing, and cyl #1 misfire. Had car towed and it sat for a long while before I had time to deal with it.
Fast forward to now. Finally dug into the engine. Pulled VVT oil line screens, didn't see any clog or debris. Got compression of 205, 220, 220, 210, 210, 220 #1cyl at 205. During compression test, had pressure release 'pop' through #1 intake.
Figured the only way this was going to get right was by dropping the engine, so I took it out, pulled the valve covers, and found #1 exhaust rockers ajar, laying beneath the cam, beside the valve springs (photo attached). One valve lash cap still in place. The other has gone missing. One of the cam lobes (the one with the migrant cap) is slightly scarred, but doesn't seem too bad. I'm disassembling the engine to remove timing cover and bank 1 cams and lifters.
As I search for the missing cap, I'm looking for recommendations on the minimum disassembly I can get away with, parts I should replace while I'm in there, and tests/inspections I should do. My hypothesis is degraded oil flow through VVT oil channel or valve cover shower tube caused a collapsed lifter at startup and the ticking came from dislodged rocker or valve lash cap.
I'm planning to replace the bad lifter and cap, and probably the associated rocker. I'm guessing it makes sense to soak/clean all the lifters. I'm hoping to avoid pulling the head
I should mention I replaced the water pump and t-stat at 160k.
I'm trying to get the car functional quickly as a loaner to my brother-in-law for local use. I will have the opportunity to go back in sometime later if there are 'nice to do' long term recommendations.
Any help from the community, including source for parts in Seattle area, greatly appreciated!
I'll plan on documenting the journey and posting when time allows.
One fine day after driving approx. 45 min, then parking for about 30 min. Started up to hear a loud ticking noise in valve train. Drove it briefly. Ticking didn't stop. Read out codes that said something about cam timing, and cyl #1 misfire. Had car towed and it sat for a long while before I had time to deal with it.
Fast forward to now. Finally dug into the engine. Pulled VVT oil line screens, didn't see any clog or debris. Got compression of 205, 220, 220, 210, 210, 220 #1cyl at 205. During compression test, had pressure release 'pop' through #1 intake.
Figured the only way this was going to get right was by dropping the engine, so I took it out, pulled the valve covers, and found #1 exhaust rockers ajar, laying beneath the cam, beside the valve springs (photo attached). One valve lash cap still in place. The other has gone missing. One of the cam lobes (the one with the migrant cap) is slightly scarred, but doesn't seem too bad. I'm disassembling the engine to remove timing cover and bank 1 cams and lifters.
As I search for the missing cap, I'm looking for recommendations on the minimum disassembly I can get away with, parts I should replace while I'm in there, and tests/inspections I should do. My hypothesis is degraded oil flow through VVT oil channel or valve cover shower tube caused a collapsed lifter at startup and the ticking came from dislodged rocker or valve lash cap.
I'm planning to replace the bad lifter and cap, and probably the associated rocker. I'm guessing it makes sense to soak/clean all the lifters. I'm hoping to avoid pulling the head
I should mention I replaced the water pump and t-stat at 160k.
I'm trying to get the car functional quickly as a loaner to my brother-in-law for local use. I will have the opportunity to go back in sometime later if there are 'nice to do' long term recommendations.
Any help from the community, including source for parts in Seattle area, greatly appreciated!
I'll plan on documenting the journey and posting when time allows.
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