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My 2007 Jimny has recently developed an awful noise between roughly 2000 and 3000 rpm. It sounds an awful lot like pinging. The noise seems to be coming from the top of the engine.
Do any of you have any ideas on what the problem could be? Is this a common issue?
I'll be pulling the rocker cover first thing tomorrow morning to see if anything's loose. Also I'll pull the plugs and check the cylinders with a bore scope.
Without being able to hear it it could potentially be lots of things. I think you are on the right track checking for acute failure points.
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
Bellerophon (2024 grello van daily
ADOS Attention Deficit Ooooh Shiny!
Could it be just a loose heat shield on the exhaust?
Or loose parts inside the catalytic converter in the manifold?
Any difference in the noise when the engine is under load when accelerating?
if you use a wooden stick to listen thru, you can press one end at parts of the engine, and listen to the other end of the stick. it will isolate the noises and help you find the location.
(Or you can buy or borrow a stethoscope)
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