Timing Knock or tap

cre · 06-02-2010, 12:50 AM

Don't have time to cover all of this right now.... but here's some:

Leave the timing at 10* (both NA and turbo) the ECU adds timing on it's own. http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=20

The washer thing the other person mentioned probably worked due to a worn dizzy drive gear... leave it alone.

The injectors on these cars are LOUD, one source of common paranoia is often the injectors... They're just built that way. Another source of light tapping noises is excessive valve lash, search "valve shim" or "valve shim adjustment" for more on that matter.

There is a HUGE difference between injector noise and valve noise and knock and a header exhaust leak. The latter two are considerably deeper.

I recommend everyone purchase an automotive stethoscope to add to their tool kit... they're invaluable when it comes to tracking down noises.

06-02-2010, 12:50 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Don't have time to cover all of this right now.... but here's some: Leave the timing at 10* (both NA and turbo) the ECU adds timing on it's own. http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=20 The washer thing the other person mentioned probably worked due to a worn dizzy drive gear... leave it alone. The injectors on these cars are LOUD, one source of common paranoia is often the injectors... They're just built that way. Another source of light tapping noises is excessive valve lash, search "valve shim" or "valve shim adjustment" for more on that matter. There is a HUGE difference between injector noise and valve noise and knock and a header exhaust leak. The latter two are considerably deeper. I recommend everyone purchase an automotive stethoscope to add to their tool kit... they're invaluable when it comes to tracking down noises. __________________ 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 --->