SR20DET Squeal coming from head - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

landins13 · 09-14-2009, 12:13 AM

Ok so ive put about 1k miles on my bult sr, the motor was built and assembled by a reputable shop im naming names because i dont want to accidentally down talk them.

I have a loud squealing coming from somewhere in the head, as well as an almost grinding quaking sound coming from the exhaust side cam. after taking off my valve cover, i noticed that all of the cam lobes and rockers look brand new except for on cylinder 1, on that cylinder the rockers are grity and covered in crap,

my key issue, the cam lobes on this cylinder are worn down out of nowhere, the center of the cam is shiny and smooth but at the edgesthere is a lip on the lobe where it feels as though the center of the lobe had worn down from hitting the rocker.

i dont know what the squaelling is and i dont want to drive the car while its making the sound, nor do i want to drive it with the cam lobes wearing.

any help or suggestions are appreciated, im going to call the shop that built the motor in the morning

landins13 · 09-14-2009, 03:10 PM

bump bump bump

*fliprayzin240sx* · 09-15-2009, 05:35 AM

My stab at it is either low oil pressure or the oil dripper is clogged. Bring it to them, have them check it out...hope its not low oil pressure. If its just clogged, they should have cleaned it up or atleast checked to make sure its not clogged. Also, if you have an aftermarket cam, somebody owes you a new one.

landins13 · 10-11-2009, 04:36 PM

i replaced my cams and rockers and reshimmed the head, ive got a video of the sound, i believe ive narrowed it down to the something in the bell housing, either the trhow out bearing or possibly the pilot bearing or something of the sorts

here is the video

jspaeth · 10-11-2009, 05:08 PM

So the "squeal coming from the head" was coming from the tranny?

landins13 · 10-11-2009, 11:32 PM

there were 2 noises at first one was the sound of the cam getting worn down and that was coming from the head, the sqweal sounded like it was coming more from the back of the head and a little lower, i got an automotive stethiscope and after having fixed the issue with the cams i was able to localize the sound to the bell housing

rebornS14 · 10-12-2009, 11:02 PM

sounds crazy. is that a s14 with abs? i dont know what your problem is. just watched the video and noticed abs.

*fliprayzin240sx* · 10-13-2009, 07:12 AM

Quote:

Originally Posted by rebornS14

sounds crazy. is that a s14 with abs? i dont know what your problem is. just watched the video and noticed abs.

ABS was an option for S14s...

09-14-2009, 12:13 AM	#1
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	SR20DET Squeal coming from head Ok so ive put about 1k miles on my bult sr, the motor was built and assembled by a reputable shop im naming names because i dont want to accidentally down talk them. I have a loud squealing coming from somewhere in the head, as well as an almost grinding quaking sound coming from the exhaust side cam. after taking off my valve cover, i noticed that all of the cam lobes and rockers look brand new except for on cylinder 1, on that cylinder the rockers are grity and covered in crap, my key issue, the cam lobes on this cylinder are worn down out of nowhere, the center of the cam is shiny and smooth but at the edgesthere is a lip on the lobe where it feels as though the center of the lobe had worn down from hitting the rocker. i dont know what the squaelling is and i dont want to drive the car while its making the sound, nor do i want to drive it with the cam lobes wearing. any help or suggestions are appreciated, im going to call the shop that built the motor in the morning __________________ NO HANDS IN PANTS!!

09-14-2009, 03:10 PM	#2
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	bump bump bump __________________ NO HANDS IN PANTS!!

09-15-2009, 05:35 AM	#3
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	My stab at it is either low oil pressure or the oil dripper is clogged. Bring it to them, have them check it out...hope its not low oil pressure. If its just clogged, they should have cleaned it up or atleast checked to make sure its not clogged. Also, if you have an aftermarket cam, somebody owes you a new one. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

10-11-2009, 04:36 PM	#4
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	i replaced my cams and rockers and reshimmed the head, ive got a video of the sound, i believe ive narrowed it down to the something in the bell housing, either the trhow out bearing or possibly the pilot bearing or something of the sorts here is the video __________________ NO HANDS IN PANTS!!

10-11-2009, 05:08 PM	#5
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 37 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	So the "squeal coming from the head" was coming from the tranny? __________________ Daily driven

10-11-2009, 11:32 PM	#6
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	there were 2 noises at first one was the sound of the cam getting worn down and that was coming from the head, the sqweal sounded like it was coming more from the back of the head and a little lower, i got an automotive stethiscope and after having fixed the issue with the cams i was able to localize the sound to the bell housing __________________ NO HANDS IN PANTS!!

10-12-2009, 11:02 PM	#7
rebornS14 Zilvia FREAK! Join Date: Jun 2008 Location: Cerritos, CA Posts: 1,358 Trader Rating: (13) Feedback Score: 13 reviews	sounds crazy. is that a s14 with abs? i dont know what your problem is. just watched the video and noticed abs.

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