P0420 code + horrible sound from engine
#1
Driver School Candidate
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P0420 code + horrible sound from engine
Long story short I inherited a 2000 RX300 with 167K miles. Drove the car back and forth from Las Vegas to Cedar City, Utah twice in the past couple weeks with no issues. Yesterday while driving around town the check engine light came on followed by a horrible sound from the engine (video included). I dont have any info regarding maintenance for this vehicle, only that it drove perfectly fine for 500+ miles and then this sudden acute issue.
Any and all feedback would be greatly appreciated!
Thanks in advance
Video of intermittent knocking sound that appears to be coming from the 6th cylinder perhaps originating from the head?
Any and all feedback would be greatly appreciated!
Thanks in advance
Video of intermittent knocking sound that appears to be coming from the 6th cylinder perhaps originating from the head?
#3
1. Oil level? How fresh is oil?
2. timing. Was belt ever done? It awfully sounded like bad rocker lash. As it has VVT-I, it might as well be result of something going on there. Don't forget, there are 2 VVT-I oil filters that at that mileage might as well be clogged, causing VVT-I failure.
So start with basic - maintenance check.
2. timing. Was belt ever done? It awfully sounded like bad rocker lash. As it has VVT-I, it might as well be result of something going on there. Don't forget, there are 2 VVT-I oil filters that at that mileage might as well be clogged, causing VVT-I failure.
So start with basic - maintenance check.
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Twojzsc3 (09-06-17)
#4
Intermediate
Sounds like an oil pressure issue. Clean the ocv filters. Pull off the valve cover and see whats loose in there
once the rpm increased it quieted down as if it was lubricated. Good chance the damage has been done by now if it wasnt getting oil
once the rpm increased it quieted down as if it was lubricated. Good chance the damage has been done by now if it wasnt getting oil
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Twojzsc3 (09-06-17)
#5
Driver School Candidate
Thread Starter
thank you you for the replies! Happy to know what the culprit was!
#6
Driver School Candidate
Thread Starter
1. Oil level? How fresh is oil?
2. timing. Was belt ever done? It awfully sounded like bad rocker lash. As it has VVT-I, it might as well be result of something going on there. Don't forget, there are 2 VVT-I oil filters that at that mileage might as well be clogged, causing VVT-I failure.
So start with basic - maintenance check.
2. timing. Was belt ever done? It awfully sounded like bad rocker lash. As it has VVT-I, it might as well be result of something going on there. Don't forget, there are 2 VVT-I oil filters that at that mileage might as well be clogged, causing VVT-I failure.
So start with basic - maintenance check.
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#8
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#11
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#12
Looking at that spark plug it seems like you had a major oil burner, likely due to the clogged baffles/ports in the rear valve cover, and the oil level went real low causing other damage. If it was just a clogged oil control valve filter, I don't see why you would have the deposit build up on the plug.
#13
Super Moderator
With spark plugs, you might also here a helicopter like noise when accelerating from a dead stop. That generally means they are getting old, out of gap.
#14
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#15
Oil burner... But you see, oil burn like this is reason number one coming from bad plug tube seals and number 2 - head gasket. You'd have had plug insulator covered in oil if #1.
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