What sound results from bad lifters, rocker arms, or valves? - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 4 Weeks Ago Thread Starter
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What sound results from bad lifters, rocker arms, or valves?

Not sure what is quite wrong with my engine but I think it's one of the three.


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Quote:
Originally Posted by raine247 View Post
Not sure what is quite wrong with my engine but I think it's one of the three.
Ticking, tapping, clacking, etc.
Mechanics stethoscopes are are $5 at harbor freight. I stand corrected, $4.
https://www.harborfreight.com/Mechan...ope-63691.html

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Similar to dumping a handful of quarters into a tin bucket. Bad valves would only make serious noise is the ends of the valve stems are worn. Generally they give you an engine miss.
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All the time or only at idle?

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Originally Posted by nfrizell View Post
All the time or only at idle?

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Normally only when I give it gas but it doesn't always make the noise.


Video of noise:

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I'm thinking more lean condition, detonation. Maybe exhaust leak.

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Originally Posted by nfrizell View Post
I'm thinking more lean condition, detonation. Maybe exhaust leak.

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Interesting, first time I've heard that diagnosis. Would love for it to be the right one. Much better than the alternatives.


My issue with it is that the noise, to me, sounds very harsh (metal banging against metal) and not like the exhaust leaks I've heard when scouring youtubes

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+1 on the mechanic's stethoscope. You will be surprised what can be learned from such a simple tool. At the very least it will tell you where the problem is not.

If the problem is coming from the valve cover area, think "loose roller follower". A visual inspection under the valve cover could be useful.

Just wondering. How many miles on this motor?

I'm a big believer in using an oil filter cutter to cut open and inspect the oil filter after every oil change. This method has already "saved" two motors for me. Metal debris in the oil is an important clue what's happening inside your motor.

Longacre Oil Filter Cutters 77750
https://www.summitracing.com/parts/lng-77750/overview/

This thread does not state the model year of the Mustang in question. There is a Ford TSB that deals with a valve tick on 2001 Romeos. It's caused by poor coolant flow around the #8 cylinder. The "fix" isn't pretty. To replace with the re-designed heads. Note, before you ask. A TSB is not a warranty.

2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.
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post #9 of 9 (permalink) Old 6 Days Ago Thread Starter
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Quote:
Originally Posted by wmburns View Post
+1 on the mechanic's stethoscope. You will be surprised what can be learned from such a simple tool. At the very least it will tell you where the problem is not.

If the problem is coming from the valve cover area, think "loose roller follower". A visual inspection under the valve cover could be useful.

Just wondering. How many miles on this motor?

I'm a big believer in using an oil filter cutter to cut open and inspect the oil filter after every oil change. This method has already "saved" two motors for me. Metal debris in the oil is an important clue what's happening inside your motor.

Longacre Oil Filter Cutters 77750
https://www.summitracing.com/parts/lng-77750/overview/

This thread does not state the model year of the Mustang in question. There is a Ford TSB that deals with a valve tick on 2001 Romeos. It's caused by poor coolant flow around the #8 cylinder. The "fix" isn't pretty. To replace with the re-designed heads. Note, before you ask. A TSB is not a warranty.

It's a 1999 GT with around 163,000 miles on it. I went out and got a mechanics stethoscope and started probing around. I couldn't find the source with it, The only ticking I heard was from the injectors and a spot by valve cover bolt on the drivers side towards the firewall but it wasn't JUMPING out at me like the injectors were. When I opened the throttle with the probe on the injectors I could hear the ticking increase. When I put the probe on the valve covers I couldn't hear the noise

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