knock for split second during start up
#1
knock for split second during start up
Just rebuilt my b16a has about 2000 miles on it so far.
Just recently during start up it knocks/rattles for only 2 to 4 seconds then goes away..... it does not make any other noise besides my valve terrain ticking .... my pops says it sound like a rod bearing...now this does not happen everytime I start it..... only when it sits for a long period of time...... I can start it in the morning hear the noise turn the car off start it again and there would be no noise... I have been searching thread to thread to see if anyone has a similiar problem but each thread I read they hear there knock more then once like during start up anf during a certain rpm.... mine just happens during a start up for a split second. Its almost like the filter drains back and has to fill up again? I don't know I had a mechanic tell me .... or I loose oil pressure but I don't know I just don't want thos to mess up my motor..... motor runs with no provlems just that noise during slthe first start up and my valve lash.... any opinions?
Just recently during start up it knocks/rattles for only 2 to 4 seconds then goes away..... it does not make any other noise besides my valve terrain ticking .... my pops says it sound like a rod bearing...now this does not happen everytime I start it..... only when it sits for a long period of time...... I can start it in the morning hear the noise turn the car off start it again and there would be no noise... I have been searching thread to thread to see if anyone has a similiar problem but each thread I read they hear there knock more then once like during start up anf during a certain rpm.... mine just happens during a start up for a split second. Its almost like the filter drains back and has to fill up again? I don't know I had a mechanic tell me .... or I loose oil pressure but I don't know I just don't want thos to mess up my motor..... motor runs with no provlems just that noise during slthe first start up and my valve lash.... any opinions?
#2
Re: knock for split second during start up
Also I've changed my oil no oil shavings at all I run 10w-30 as of now... I had a fram oil filter then I did a cheap oil filter and now I have a oem filter on it.
#4
Re: knock for split second during start up
The noise is coming from the bottom end .... my valves are making a faint noise... not to loud but I can hear them....but when I first start up its not a onock then valves I can hear both but the 2 to 4 second knock vanishes til the car sits over night or for a long period of time
#5
Seagull Management
Join Date: Jun 2008
Location: Miramichi, NB, Canada
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Re: knock for split second during start up
Honestly it really sounds you've got valves adjusted too loose. They will hammer pretty bad and sound like rod knock for a few seconds and then they'll sound fine until the engine cools off again.
Also, run 5W30.
Also, run 5W30.
#6
Re: knock for split second during start up
Correction I already run 5w-30 and I have had four mechanics tell me that its in the bottom end...I just drove my car home and I was listening through my entire rpm range and nothing out of the normal..... still pulls awesome....is the a check valve in my oil pump stuck or is there even one? Should I run 10w-30?.... I am gonna get a tool from honda for my valves to adjust them.... I really didn't replace my oil pump when I rebuilt it but I didn't think anything of it.... should have but didn't...also ima say this start about 1500 miles into breaking it in....if that helps any...
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#12
Re: knock for split second during start up
Adjusted my valves exhuast side.. .007 and intake side... .006 got rid of my tickin during startup in my valve terrain little tick comes back when its warm.....but that knock noise is still there when I start up for that split second ....... so 98civdx can you explain why the valves would tap then just go away????? But it wont do it again in my next start up....unless the car sits for a long period of time.....overnight or while I'm at work.....
#13
Re: knock for split second during start up
And it "like I stated before" just started doing it so i would of had valve tap from the beginning...... right?... no disrespect just trying to understand and figure this out
#14
Re: knock for split second during start up
it will tick for a second if your car is sitting at an angle, theres no oil in the head an it takes 2 or 3 sec for the oil to get there, that is all
#16
Honda-Tech Member
Re: knock for split second during start up
Just rebuilt my b16a has about 2000 miles on it so far.
Just recently during start up it knocks/rattles for only 2 to 4 seconds then goes away..... it does not make any other noise besides my valve terrain ticking .... my pops says it sound like a rod bearing...now this does not happen everytime I start it..... only when it sits for a long period of time...... I can start it in the morning hear the noise turn the car off start it again and there would be no noise... I have been searching thread to thread to see if anyone has a similiar problem but each thread I read they hear there knock more then once like during start up anf during a certain rpm.... mine just happens during a start up for a split second. Its almost like the filter drains back and has to fill up again? I don't know I had a mechanic tell me .... or I loose oil pressure but I don't know I just don't want thos to mess up my motor..... motor runs with no provlems just that noise during slthe first start up and my valve lash.... any opinions?
Just recently during start up it knocks/rattles for only 2 to 4 seconds then goes away..... it does not make any other noise besides my valve terrain ticking .... my pops says it sound like a rod bearing...now this does not happen everytime I start it..... only when it sits for a long period of time...... I can start it in the morning hear the noise turn the car off start it again and there would be no noise... I have been searching thread to thread to see if anyone has a similiar problem but each thread I read they hear there knock more then once like during start up anf during a certain rpm.... mine just happens during a start up for a split second. Its almost like the filter drains back and has to fill up again? I don't know I had a mechanic tell me .... or I loose oil pressure but I don't know I just don't want thos to mess up my motor..... motor runs with no provlems just that noise during slthe first start up and my valve lash.... any opinions?
#18
Re: knock for split second during start up
Id figure its rods or main I am guessing premature wear or something just shitty......after warm up though it runs awesome
#20
Honda-Tech Member
Re: knock for split second during start up
#22
Re: knock for split second during start up
i found out what it is.....my oil pump is failing.....so its time to replace it... thanks guys for your help much appreciated
#23
Re: knock for split second during start up
How did you narrow it down to the oil pump??
Anyways, if it were piston slap, it only going to do it when cold, and go away pretty quickly.
Anyways, if it were piston slap, it only going to do it when cold, and go away pretty quickly.
#24
Re: knock for split second during start up
Well I took the bottom end apart and inspected everything ....bearings, thrust washers, looked for any odd wear marks I found mothing but everytime I turned the crank I heard a slight noise in the oil pump ....as well as my dad did so I replaced it and the noise stopped
I guess once it created pressure that noise would stop so that's why it was a split second....so I am glad now lol but now I have my lma's making noise... and gotta replace those so I guess ill do that soon
I guess once it created pressure that noise would stop so that's why it was a split second....so I am glad now lol but now I have my lma's making noise... and gotta replace those so I guess ill do that soon
#25
Honda-Tech Member
Re: knock for split second during start up
Well I took the bottom end apart and inspected everything ....bearings, thrust washers, looked for any odd wear marks I found mothing but everytime I turned the crank I heard a slight noise in the oil pump ....as well as my dad did so I replaced it and the noise stopped
I guess once it created pressure that noise would stop so that's why it was a split second....so I am glad now lol but now I have my lma's making noise... and gotta replace those so I guess ill do that soon
I guess once it created pressure that noise would stop so that's why it was a split second....so I am glad now lol but now I have my lma's making noise... and gotta replace those so I guess ill do that soon