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knock sound just started..

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after trying to listen closely it sounded like it may be from the head but ive had vct rattle in my old car and doesn't sound like that. i went to test for rod movement today by turning the engine over but the crank pulley bolt is huge didn't have a socket big enough
 
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tried it made no difference it does sound like its the valves or something. Just done an oil change 2 days ago but it was doing it prior to that should i try a thicker oil, if that doesnt work what needs replacing
 
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Thicker oil, no. The oil galleries on a SR are small anyway so you will be slowing the oil flow up into the rocker gear especially on start up. I would get a professional opinion as I said it could be a big end bearing..
 
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Take the plug off the VCT solenoid and see if that quietens it..
problem with that trick is that it only works 20% of the time, if your engine is over 100ks i would look at replacing the control solenoid as its just a good idea. I had a noise coming from my engine, and i at first tried the unplug and though that due to this making no difference the solenoid and cam gear were fine, bleed the lifters 3 times, and checked all the valve train over for abnormal wear signs.... months later just brought a new solenoid as a last resort out of frustration and what do you know... fixed
 
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have you tried the old fashioned trick where you get a length of garden hose, put one end into your ear (put a plug in the other) and move the hose around the engine to define exactly where the noise is coming from?
 

S15_SAM

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It does sound like the deep knock of bottom end. Didn't you have the rocker off recently? Also what oil and how much did you use?
 
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have you tried the old fashioned trick where you get a length of garden hose, put one end into your ear (put a plug in the other) and move the hose around the engine to define exactly where the noise is coming from?
I use a long screw driver and put my ear to that...works well isolating engine noises..
 

mattyb

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A set of bug end bearings is less than a ton over here so id just get a set n change them. Easily done in a few hours. On a civic anyway.
 
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