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Rod knock

  

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Was driiving yesterday when ii noticed noise from the engine went from quiet to very loud could this be rod knock the car is a Honda CRV with the R20a1 engine?

https://youtu.be/kvjA1_XZpSc?si=0pkc-1VqlcAWth_L


4 Answers
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Posted by: @ubuntuscofield

Was driiving yesterday when ii noticed noise from the engine went from quiet to very loud could this be rod knock the car is a Honda CRV with the R20a1 engine?

As long as the oil light indicator didn't come on, the engine itself is most likely fine. I had a rear main go out in my '79 Pontiac last year and I saved the engine by keeping oil in the car until a mechanic I go to sometimes could replace it. The oil pump pumps oil up to the top of the engine, and it trickles back down. The engine's crankshft is hollow. If the oil indicator light came on, the last thing to go is the crankshaft main bearings (the cause of rod knock). Your camshafts would be the first to go. 

Posted by: @ubuntuscofield

Oh and i noticed that the car was loosing power on hills and the transmission was shifting erratically at times and if i hit the pedal to the floor there was a delay in acceleration,  could this be a timing chain/tensioner fault?

Scotty doesn't answer questions more than once. Try posting your question as another question and he may respond again, if another moderator can't help you. 


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https://youtu.be/Bad9JIBFoOI?si=08cK2yUfg1R8wMMP  

Here's a YouTube video describing rod knock. It's a quite distinctive sound the comes from the lower part of the engine block. The big end of the connecting rod is around 3 to 4 inches across, and it making the "boom" sound is unmistakable. 


Thanks went to a mechanic he took apart the engine he says the oil pump/balancer is damaged. the chain was stretched and there was wear/dent on the the balancer. the crankshaft was rough and he took it to the machinist and says i have to replace the pump chain as well as the engine and rod bearings. is this explanation plausible??


2
Posted by: @ubuntuscofield

Thanks went to a mechanic he took apart the engine he says the oil pump/balancer is damaged. the chain was stretched and there was wear/dent on the the balancer. the crankshaft was rough and he took it to the machinist and says i have to replace the pump chain as well as the engine and rod bearings. is this explanation plausible??

Assuming the mechanic is being honest about what he saw, yes. However with that much internal damage you'd probably be better off replacing the engine rather than rebuilding what you have.


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It's kind of a messy audio there, but I don't think it's rod knock. Take off your fan belts and pray the noise goes away. That would mean it's something like the air conditioner pulley or the alternator making noise. The noise would stop when you take the belts off of course


I am grateful that the great Mechanic has taken the time to reply, we took of the fan belt but the sound remains, when the valve cover is removed there are some metallic shavings and some fluid spraying but i noticed the sound got a little quieter with the valve cover off. Ill try to get a better sound recording sir

 

Oh and i noticed that the car was loosing power on hills and the transmission was shifting erratically at times and if i hit the pedal to the floor there was a delay in acceleration,  could this be a timing chain/tensioner fault?


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