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The Terminator
Engine/Tuning
head tick: bad lash adjuster ?
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<blockquote data-quote="mwolson" data-source="post: 7328432" data-attributes="member: 16006"><p>Unfortunately, it is more likely that the tick is due to a worn valve guide than a bad lash adjuster. I hear a lot of people just let it tick and don't worry about it.</p><p></p><p>Here is the text of the TSB I found on this:</p><p></p><p>Article No</p><p>03-11-4 ENGINE - MUSTANG COBRA - TICK NOISE FROM ENGINE - COBRA VEHICLES EQUIPPED WITH ENGINES BUILT BEFORE 11/1/2002 ONLY</p><p></p><p>Publication Date: May 23, 2003</p><p></p><p>FORD: 2003 MUSTANG</p><p></p><p>ISSUE:</p><p>Some 2003 Mustang Cobra vehicles with engines built before 11/1/2002 may exhibit an unusual engine tick noise that is present at all temperatures during idle. This noise may be due to valve guide wear in the left bank cylinder head. Guide wear manifest itself as a tick noise which can be heard at the rear of LH head, through LH catalyst, at the LH front wheel well and may not be heard with the hood open.</p><p></p><p>ACTION:</p><p>Use the diagnostic procedures listed in this article to evaluate the vehicle condition and replace the cylinder head if applicable. Refer to the following Service Procedure for details.</p><p></p><p>SERVICE PROCEDURE</p><p>NOTE: THIS REPLACEMENT CYLINDER HEAD WILL NO IMPROVE OR REDUCE PERFORMANCE. </p><p></p><p>In order to diagnose noise, the following items must be checked:</p><p></p><p>- Verify noise by placing a stethoscope on the back of the left head near the exhaust ports.</p><p>- Verify that the noise is heard in the left side exhaust system (left side wheel well or catalytic converter, from underneath the vehicle).</p><p>- Try to isolate the noise by cancelling the cylinders, by unplugging the injectors one at a time (start with #8 cylinder).</p><p>- Verify that there are no exhaust manifold leaks.</p><p>- Check to make sure that the camshaft spacers are in place. If not, install cam spacers (per Workshop Manual Section 303-01C) and retest vehicle.</p><p>- Check for proper cam sprocket bolt torque, retorque to spec listed in the Workshop Manual Section 303-01C.</p><p>- Check for spongy lash adjusters (refer to Section 303-00 in the corresponding Workshop Manual).</p><p>- Verify that the timing chain tensioner pin has been removed.</p><p>- If the above diagnostic does not eliminate the noise while the cylinder are cancelled, and the engine was built prior to 11/1/2002, replace the left side cylinder head and cam assembly with Part Number 3R2Z-6049-GA. Refer to Workshop Manual Section 303-01C for cylinder head replacement procedures.</p><p></p><p>PART NUMBER PART NAME</p><p>3R2Z-6049-GA Cylinder Head And Cam Assembly - Left - Cobra Only</p><p></p><p>OTHER APPLICABLE ARTICLES:</p><p>NONE</p><p></p><p>WARRANTY STATUS:</p><p>INFORMATION ONLY</p><p></p><p>I have read that one possible cause for this is heating, and is why many people do the head cooling mod.</p><p></p><p>If it is the lash adjuster, it is pretty easy to get it out once the valve cover is off. You need to esure the cam for that valve is on its baseline, compress the spring, pop out the follower then pop out the lash adjuster. But I hear getting the drivers side valve cover off is a b**ch due to interference with the master cylinder.</p></blockquote><p></p>
[QUOTE="mwolson, post: 7328432, member: 16006"] Unfortunately, it is more likely that the tick is due to a worn valve guide than a bad lash adjuster. I hear a lot of people just let it tick and don't worry about it. Here is the text of the TSB I found on this: Article No 03-11-4 ENGINE - MUSTANG COBRA - TICK NOISE FROM ENGINE - COBRA VEHICLES EQUIPPED WITH ENGINES BUILT BEFORE 11/1/2002 ONLY Publication Date: May 23, 2003 FORD: 2003 MUSTANG ISSUE: Some 2003 Mustang Cobra vehicles with engines built before 11/1/2002 may exhibit an unusual engine tick noise that is present at all temperatures during idle. This noise may be due to valve guide wear in the left bank cylinder head. Guide wear manifest itself as a tick noise which can be heard at the rear of LH head, through LH catalyst, at the LH front wheel well and may not be heard with the hood open. ACTION: Use the diagnostic procedures listed in this article to evaluate the vehicle condition and replace the cylinder head if applicable. Refer to the following Service Procedure for details. SERVICE PROCEDURE NOTE: THIS REPLACEMENT CYLINDER HEAD WILL NO IMPROVE OR REDUCE PERFORMANCE. In order to diagnose noise, the following items must be checked: - Verify noise by placing a stethoscope on the back of the left head near the exhaust ports. - Verify that the noise is heard in the left side exhaust system (left side wheel well or catalytic converter, from underneath the vehicle). - Try to isolate the noise by cancelling the cylinders, by unplugging the injectors one at a time (start with #8 cylinder). - Verify that there are no exhaust manifold leaks. - Check to make sure that the camshaft spacers are in place. If not, install cam spacers (per Workshop Manual Section 303-01C) and retest vehicle. - Check for proper cam sprocket bolt torque, retorque to spec listed in the Workshop Manual Section 303-01C. - Check for spongy lash adjusters (refer to Section 303-00 in the corresponding Workshop Manual). - Verify that the timing chain tensioner pin has been removed. - If the above diagnostic does not eliminate the noise while the cylinder are cancelled, and the engine was built prior to 11/1/2002, replace the left side cylinder head and cam assembly with Part Number 3R2Z-6049-GA. Refer to Workshop Manual Section 303-01C for cylinder head replacement procedures. PART NUMBER PART NAME 3R2Z-6049-GA Cylinder Head And Cam Assembly - Left - Cobra Only OTHER APPLICABLE ARTICLES: NONE WARRANTY STATUS: INFORMATION ONLY I have read that one possible cause for this is heating, and is why many people do the head cooling mod. If it is the lash adjuster, it is pretty easy to get it out once the valve cover is off. You need to esure the cam for that valve is on its baseline, compress the spring, pop out the follower then pop out the lash adjuster. But I hear getting the drivers side valve cover off is a b**ch due to interference with the master cylinder. [/QUOTE]
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