2000 mustang GT tapping sound in engine

[dreamcar00]

3043.1

Hello,

My name is Joseph Kent I�m from Huntsville Alabama. I own a 2000 model mustang GT with a 4.6 SOHC completely stock. The engine has a �tick� (is the best way I can describe it ) at high RPM�s anything over 2500 it�s almost like a knock but not quite as loud. It doesn�t do it in idle only going down the road just before you change gear. Just cruising down the road in fourth or fifth gear you can�t hear it. Due to only being able to hear it going down the road, I can�t pinpoint where this tick is coming from, it�s pretty loud you can even hear it inside the car. Do you have any suggestions as to what it might be? Does the 4.6�s have any kind of issue with valve springs breaking? Or could it possibly be something on the front of the engine timing chain etc? The car has not lost any power or oil pressure. It also doesn�t do it when the engine is cold, only after it heats up. It seems like when the engine reaches temp it starts to make this �tick�. Any help or suggestions would be greatly appreciated.





Thank you very much.

Joseph Kent,

[Brent]

Can you hear it if you rev the engine up at a stop?

[Invictus]

Sounds like possibly an exhaust leak... Do you change your oil faithfully? If the engine is stock then I doubt it's any valve/piston clearance issues so you can rule that out. Get a friend to stuff some towels in your exhaust pipes and rev up a bit, if the noise gets worse then you've successfully diagnosed your problem. Exhaust leak.. If you're driving and and you upshift unnecessarily to bring your car into low RPMs and give it some gas... (say 40MPH and in 5th gear) you should really be able to hear it. If all else fails bring it to the stealership.

[MonteCitan]

how loud/audible is it? as previously asked, can you hear it if you rev it up in neutral?

[dreamcar00]

the sound is pretty loud i can hear it inside the car as i'm going down the road. And you can't hear it in idle but me and a friend got out there the other day and i was just patting the gas sitting still in the driveway, and as you pat the gas up to around 2200 rpms you could hear the sound. it sounds like it might be coming from the front timming chain cover area.still not sure what it is,but i don't think it is an exauhst leak.

[USMCSS]

Back when I had a 92 GT I had a noise similar to what you are describing. I was told exhaust leak but couldn't find one. I had not too long before that installed roller rockers. Well, me and a buddy took it all apart again cause that's where the sound seemed to come from. We found that one of the rods and slipped out of the pre-made hole on the rocker arm and had made a smaller indintion on the arm that kept the rod in place. The ticking came from the rod pushing the rocker arm up to high and it was hitting the cover that covers the rods and rockers (going blank on the name right now cause I'm dead tired) which is what the "ticking" was from.

[bullitt482]

Quote: Originally Posted by USMCSS Back when I had a 92 GT I had a noise similar to what you are describing. I was told exhaust leak but couldn't find one. I had not too long before that installed roller rockers. Well, me and a buddy took it all apart again cause that's where the sound seemed to come from. We found that one of the rods and slipped out of the pre-made hole on the rocker arm and had made a smaller indintion on the arm that kept the rod in place. The ticking came from the rod pushing the rocker arm up to high and it was hitting the cover that covers the rods and rockers (going blank on the name right now cause I'm dead tired) which is what the "ticking" was from.

TALK ABOUT LUCKY!!!!!!


I think you are trying to say valve cover

[USMCSS]

Yes valve cover. Right as I posted the reply it came to me. Me a retard sometimes...

[bullitt482]

That's ok, when we had the bullitt, my wife would always correct me when I said "cam covers." She was raised pushrod. Now I have seen the light