The possible beginning of "bottom end knock"? - Civinfo
 
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post #1 of 14 (permalink) Old 4th May 2016, 19:25 Thread Starter
 
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The possible beginning of "bottom end knock"?

Hopefully I'm paranoid....but when me engine is warm and I'm sitting in idle...I can just hear a faint ticking noise. You can just hear it but that's maybe because I listen far to hard for any noises etc....I don't think anyone else would notice it unless they too were listening out for something!
It's like a fast ticking noise is the best way I can describe it.
07 FN2 with 72K
Any ideas?
How is bottom end knock caused?
Can it be prevented?
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post #2 of 14 (permalink) Old 4th May 2016, 19:54
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Likely to be the injectors. They're a bit noisy.

Could alternatively be valve timing - have they been checked?
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post #3 of 14 (permalink) Old 4th May 2016, 20:05 Thread Starter
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No but I'm getting it done ASAP. What other symptoms could valve clearance/timing cause?


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post #4 of 14 (permalink) Old 4th May 2016, 20:34
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A lot of Hondas have that ticking noise, mine does too
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post #5 of 14 (permalink) Old 4th May 2016, 23:16
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its probably loud injectors.

if the bottom end is going nothing can be done to save it, its caused by running the engine on low oil usually but can also occur after oil starvation due to hard cornering. its prevented by keeping the oil topped up and just doing the usuall service routine.

on idle my fn2 has a noticeable ticking noise and i know its 100% the injectors, rod knock will get louder and more noticeable as the revs increase and injectors will appear to become quieter. you could take a screwdriver and put the metal end on the fuel rail or somewhere near the injectors and your ear to the handle, this way you can attempt to find the source of the noise.
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post #6 of 14 (permalink) Old 6th May 2016, 14:26
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As every one else has said above, Injectors tick on these. Mine are the same.
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post #7 of 14 (permalink) Old 6th May 2016, 15:53 Thread Starter
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My car isn't performing very well at the minute. Its using more fuel than normal, low end acceleration is poor, hesitates when pulling away, jerks during gear change.
Car still shifts but takes a bit more to get there....
Could this be injectors then? Or valve clearance?

I've fixed/replaced loads of stuff like intake (fitted HKS RSK), new fuel filter, regularly serviced, new o2 sensor...

Now I'm thinking could be injectors, valve clearance or brake calipers sticking (have had issues with brakes had both refurbed and still catching a bit but not sure if enough to cause this)
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post #8 of 14 (permalink) Old 6th May 2016, 17:14
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probably needs mapping to suit the intake.
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post #9 of 14 (permalink) Old 6th May 2016, 18:53
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When were the valve clearances last done?
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post #10 of 14 (permalink) Old 6th May 2016, 20:34 Thread Starter
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Quote:
Originally Posted by ghost_bhp View Post
probably needs mapping to suit the intake.


It was like that well before the intake got fitted
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post #11 of 14 (permalink) Old 6th May 2016, 22:27
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an intake will at worst only cause flatspots, and the rsk is well known for not needing to be mapped onto the car. have you had the car plugged in to read codes and sure your not just being paranoid.
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post #12 of 14 (permalink) Old 7th May 2016, 07:39
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Quote:
Originally Posted by Voodoo-Nachoman View Post
an intake will at worst only cause flatspots, and the rsk is well known for not needing to be mapped onto the car. have you had the car plugged in to read codes and sure your not just being paranoid.


Depends on the car. Some need mapping to get rid of flat spots and hesitation. Others don't. just down to luck really.
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post #13 of 14 (permalink) Old 7th May 2016, 07:40
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Valves most likely.

Other causes can be belt pulleys / tensioners although valves are the number one cause. I don't have the R so don't know about injectors, but they seem to be up there as well. Assuming the R isn't hydraulically adjusted for valve spacing, a trip to a dealer for a service with specific mention of the fact that the valves might need adjusting / the ticking should cure it.

Low end knock tends to be more of a deep rumble from memory.
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post #14 of 14 (permalink) Old 7th May 2016, 07:51
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Chain and/or tensioner fault?
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