Knocking Noise when engine is cold - CRV 2003 Pls. Help

**jgriosa** · April 12th, 2009 12:53 AM

I own a pre-owned crv 03 a/t and lately i have been hearing a knocking sound in the hood (engine?) upon start up in the morning ( or when the engine is cold ). The noise persists for a couple of minutes but then disappears when the engine is warmed up na. Had it checked and repaired in Honda Cars Makati - they said the problem was the tensioner bearing and of course I had it replaced by them. But alas, the knocking noise is still there. Can someone please tell me what the problem might be? and a possible solution?

Thank you in advance for your help.

**jgriosa** · April 12th, 2009 12:59 AM

Btw, read somewhere about somewhere about "piston slaps" on CRV engine and was said to be normal? please enlighten

**oj88** · April 13th, 2009 12:33 AM

What type and specifications of fuel and motor oil do you use? Does the engine shake when you hear the knocking?

**niky** · April 13th, 2009 02:02 PM

Could it be the engine mounts rattling around?

**woohoo** · April 13th, 2009 04:32 PM

Originally Posted by niky

Could it be the engine mounts rattling around?

+1! Ganyan iyung isang sasakyan namin dati, maluwag na pala sa pagkaka-mount ang engine. When the engine is cold, it vibrates a lot more than when it is hot.

**oj88** · April 13th, 2009 05:27 PM

Originally Posted by niky

Could it be the engine mounts rattling around?

Exactly what I was driving at.

**jgriosa** · April 13th, 2009 08:27 PM

thanks for the replies. I use Petron Touring for my latest oil change, prior to that regular mineral oil. It cant be a loose engine support either otherwise Honda makati would have seen it when they worked on it last week. Its a "takatak noise" and its very audible. It starts when you start the engine in the morning or when you start it after around five hours of being parked. seems like the noise is from inside the engine.

hope you still have the patience to let me know what u think.

btw, can i ask a refund from the casa? because clearly what they sold me was not the answer to my problem

**Psylocke** · April 13th, 2009 09:30 PM

adjust the valve clearance.

**boy_tino** · April 13th, 2009 10:02 PM

Originally Posted by Psylocke

adjust the valve clearance.

1 point

engine knocking lalo na kapag naka ilang naka kilometers na ang itinakbo nito kelangan ulit i reset or i restandard ang valve clearance engine mo actually dapat nga every 50k-km dapat ipinapacheck mo na ito kung nasa standard pa rin ang clearance nito para gumanda ang compression.

pag malala na ang knocking nyan malamang top overhaul na ang gagawin dyan palit valve, vavle spring at valve seals syempre ipapa machine shop mo pa ang cylinder head para ipa-hasa or ipa-grind ang pinaglalapatan ng vavle mo para mas lalong mag improve ang compression ng makina mo kesa sa dati.

pero sa pagkakasabi ni jgriosa mukhang valve clearance adjustment lang ang kelangang dahil sa ang sabi nya tuwing iistart nya lalo na sa umaga pagmalamig pa ang makina ay nagnaknock ito pero pag mainit na ang nawawala naman na........... kung engine support naman kahit mainit o malamig ang makina mo manginig pa rin ito, di bale makikita mo naman sa mga support or mounts nyan eh kung ang rubber or goma ay wasak na wasak na