Knocking from Engine (H22A) - FIXED

Post by **vanzep** » Fri Apr 13, 2018 3:34 pm

Started the car up this morning all ok but after a few miles it has developed a distinct knocking noise from the block. It may have been there from start up but i maybe didnt hear it due to exhaust noise/rpm on auto choke
Its been throwing an intermittent code 1 (02 sensor) for the last week or so - I have a sensor but not changed it over yet.
Car runs fine with no blue smoke.

Question i have is:

Can a fault with the 02 sensor cause the engine to sound like it has bottom end knock?
The knock in question doesnt sound metalic or like valvetrain but more of a deeper plock plock plock noise.

I plan to check vtec solenoid filter for swarf - lift the rocker cover and check timing on the cam gears - maybe drop the oil.

Any suggestions welcome!

Post by **Vtecmec** » Fri Apr 13, 2018 4:45 pm

Could be detonation?

Post by **Drax** » Fri Apr 13, 2018 4:53 pm

check your valve clearances i'd say.

lucas · Post by **lucas** » Fri Apr 13, 2018 6:16 pm

Aww man not good

Worst date for it too

Post by **vanzep** » Fri Apr 13, 2018 6:59 pm

checked the vtec solenoid no swarf or crud

turns out one of the spark plugs had wound itself right out - as soon as newkid took the spark plug cover off i could see one of the spark plugs was sitting an inch higher - it just lifted out - screwed them all back in tight and noise has gone

whew - couldnt help thinking it was curse of Friday the 13th.....

Post by **Vtecmec** » Fri Apr 13, 2018 7:14 pm

Post by **indigolemon** » Fri Apr 13, 2018 7:16 pm

Ah mate, good resolution to that one

Post by **newkid** » Fri Apr 13, 2018 7:57 pm

Was thinking the worst before I arrived. Luckily turned out to be an easy fix.

Post by **vanzep** » Sat Apr 14, 2018 12:09 am

Yep you guys were on the right tracks

guess it also explains the recent intermittent cel for 02 sensor
so thats two problems fixed

newkid will tell you it sounded very like bottom end knock

I was worried there for a couple of hours

now i just need to fix the main beam headlight issue and it will be back on track

Post by **norks27** » Sat Apr 14, 2018 9:40 am

Phew, glad that was an easy fix for you.