ticking noise from head cylinder one exhaust side

night-rider · 06-14-2011, 05:06 AM

i highly doubt it is piston slap when using a stethoscope on the exhaust cam cover at number one cylinder it is most noticable, and definately not an exhaust leak, i have read some people have noticed a noise like this that goes away when the cam position sensor bolt is loosened off and have added a very thin shim inbetween the sensor and head, i will try and loosen it off to see but i really doubt it will do anything, although the cut on the cam gear on this reman head does appears far sharper than on my original head, i cant see it making much noise

night-rider · 06-14-2011, 05:20 AM

i should also add that the noise seems to be more of a valvetrain frequency, and can barely be heard with the hood closed if your outside the vehicle, and cannot be heard inside the vehicle

interested! · 06-14-2011, 11:49 AM

Hi!
Thanks for your feedback ,
My problem ( piston slap ) took the garage and me 12000 miles to find the problem and it was a complete surprise for everyone , as it sounded for all the world like a " gappy " rocker , and the fact that the car was brand new.
Questions? - have you still got your old cylinder head? - if so , has the cam worn on the " new " head's exhaust cam at the number one cylinder position ?
I remember seeing a camshaft where the nitriding had worn away and the cam lobes had started to dissappear ,this was a real metal-maker , are the lobes all the same? maybe worth a look.

El Supracabras · 06-14-2011, 12:51 PM

It is tough to diagnose a noise from a computer screen, especially without a sound clip. Reading your above posts, it seems you are on the right track to finding the source of the noise. For what it's worth, I have yet to see a 7M that doesn't make some kind of little weird noise. Good luck.

cre · 06-14-2011, 06:35 PM

An exhaust leak can make knocking or ticking sounds.

Have you checked the cam/shim clearances?

The cam lobes do NOT normally actually contact the shims except at startup... the only time you'll hear those ticking is if the clearances are off or the shim or cam surface isn't smooth.

Do a leak down test to ensure it's not a leaking valve and check for any signs of a sticking valve.

06-14-2011, 05:06 AM	#1
night-rider Stock Join Date: May 2006 Location: grande prairie Posts: 22	i highly doubt it is piston slap when using a stethoscope on the exhaust cam cover at number one cylinder it is most noticable, and definately not an exhaust leak, i have read some people have noticed a noise like this that goes away when the cam position sensor bolt is loosened off and have added a very thin shim inbetween the sensor and head, i will try and loosen it off to see but i really doubt it will do anything, although the cut on the cam gear on this reman head does appears far sharper than on my original head, i cant see it making much noise __________________ 1987 turbo full 3" exhaust, k&n fipk, manual boost controller, walbro 255lph fuel pump, aeromotive afpr, 550cc injectors, lexus afm, fal dual electric fans, fluidyne rad, 3 angle vale job, adjustable cam gears

06-14-2011, 05:20 AM	#2
night-rider Stock Join Date: May 2006 Location: grande prairie Posts: 22	i should also add that the noise seems to be more of a valvetrain frequency, and can barely be heard with the hood closed if your outside the vehicle, and cannot be heard inside the vehicle __________________ 1987 turbo full 3" exhaust, k&n fipk, manual boost controller, walbro 255lph fuel pump, aeromotive afpr, 550cc injectors, lexus afm, fal dual electric fans, fluidyne rad, 3 angle vale job, adjustable cam gears

06-14-2011, 11:49 AM	#3
interested! 3" Exhaust Join Date: Apr 2011 Location: redhill surrey uk Posts: 142	noisy cam? Hi! Thanks for your feedback , My problem ( piston slap ) took the garage and me 12000 miles to find the problem and it was a complete surprise for everyone , as it sounded for all the world like a " gappy " rocker , and the fact that the car was brand new. Questions? - have you still got your old cylinder head? - if so , has the cam worn on the " new " head's exhaust cam at the number one cylinder position ? I remember seeing a camshaft where the nitriding had worn away and the cam lobes had started to dissappear ,this was a real metal-maker , are the lobes all the same? maybe worth a look.

06-14-2011, 06:35 PM	#5
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	An exhaust leak can make knocking or ticking sounds. Have you checked the cam/shim clearances? The cam lobes do NOT normally actually contact the shims except at startup... the only time you'll hear those ticking is if the clearances are off or the shim or cam surface isn't smooth. Do a leak down test to ensure it's not a leaking valve and check for any signs of a sticking valve. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Valve Head Noise LOUD TAPPING	batmmannn	MKIII Supra	28	11-13-2010 02:13 AM
Does the exhaust manifold need to come off to replace head gasket?	BillW	MKIII Supra	1	10-02-2009 12:19 AM
Cylinder Head??	ZauggIt1	MKIII Supra	8	10-24-2006 01:51 AM
exhaust noise	toonen	Non-Generation Specific Questions	2	05-19-2006 11:27 AM

06-14-2011, 12:51 PM	#4
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	It is tough to diagnose a noise from a computer screen, especially without a sound clip. Reading your above posts, it seems you are on the right track to finding the source of the noise. For what it's worth, I have yet to see a 7M that doesn't make some kind of little weird noise. Good luck.