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LexRexRX300

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  • First Name
    David

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  • Lexus Model
    RX300
  • Lexus Year
    2002
  • Location
    Kentucky (KY)

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  1. I had the same progression of symptoms with my 2002 RX300 as usedRX300 did. At 106,000 miles the oil pressure light came on and I discovered it was almost 5 quarts low. The vehicle had been faithfully serviced according to schedule at the Lexus dealer. Thought maybe the dealer had failed to refill the oil when it was last in for service. Occasionally a large plume of whitish smoke would come out the tailpipe in the morning when starting it cold, making it seem like it might be antifreeze leaking through the head gasket. Continued to monitor and after a few weeks started noticing it was losing a quart after 175 miles of around town driving. Took it on a highway trip and it used 3 1/2 quarts after driving 225 miles at 80-85mph (OK I have a lead foot). Had the rear valve cover and PVC valve replaced which fixed the problem. (thank you blk_on_blk for suggesting it could be a PVC related problem). Valve cover and the baffles within it, that are designed for keeping the oil out of the PVC valve, were gunked up (sludge related??). PVC valve was a bit oily (not clogged) indicating it had been sucking oil out with the air. Rear spark plugs were corroded compared to the front set. Replaced all 6 of those. Cost around $667 with my mechanic (didn't do this one at the dealer) and was relieved as I thought it was going to need a new long block for $6K-7K as discussed in some other posts.
  2. I had the same progression of symptoms with my 2002 RX300 as usedRX300 did. At 106,000 miles the oil pressure light came on and I discovered it was almost 5 quarts low. The vehicle had been faithfully serviced according to schedule at the Lexus dealer. Thought maybe the dealer had failed to refill the oil when it was last in for service. Occasionally a large plume of whitish smoke would come out the tailpipe in the morning when starting it cold, making it seem like it might be antifreeze leaking through the head gasket. Continued to monitor and after a few weeks started noticing it was losing a quart after 175 miles of around town driving. Took it on a highway trip and it used 3 1/2 quarts after driving 225 miles at 80-85mph (OK I have a lead foot). Had the rear valve cover and PVC valve replaced which fixed the problem. (thank you blk_on_blk for suggesting it could be a PVC related problem). Valve cover and the baffles within it, that are designed for keeping the oil out of the PVC valve, were gunked up. PVC valve was a bit oily (not clogged) indicating it had been sucking oil out with the air. Rear spark plugs were corroded compared to the front set. Replaced all 6 of those. Cost around $667 with my mechanic (didn't do this one at the dealer) and was relieved as I thought it was going to need a new long block for $6K-7K as discussed in some other posts.
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