ticking noise from under valve cover - Ford Mustang Forum
 
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post #1 of 10 (permalink) Old 10-01-2011 Thread Starter
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ticking noise from under valve cover

Well......Im almost home free with all my car "issues". I have a faint ticking noise coming from under my valve cover (pass side) that increases as the rpm's go up. I thought It could be a loose rocker arm so a while back I took the valve cover off and checked the bolts and all were still torqued down.

I do have stock gt40 heads from an explorer on her with my ho cam in. I do not know how to check if a lifer is going bad, if I have a bent rod, or a messed up valve. Ive read a good amount of posts on each but want some suggestions from someone who actually has fixed these type of problems. I do know it is not an exhaust leak, and I am also running a thicker oil and that has done no good.

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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post #2 of 10 (permalink) Old 10-01-2011
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Try to make sure it is not an exhaust leak first. I had the same problem that took 2 of my friends to finally find out it was an exhaust leak.

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post #3 of 10 (permalink) Old 10-02-2011 Thread Starter
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I will re-check my headers and collectors, but I put the exhaust headers on the engine while it was sitting in my garage on an engine stand. After I put the engine back in the car and after a few heat cycles I checked the bolts and all were tight. They are connected really good to the h-pipe as well. I couldnt feel any air coming from anywhere while the car was running either. Ill spray it down real good with some water and see if there is a pin hole of an exhaust leak. The noise seems to be coming from the very back of the valve cover. The noise doesnt really bother me I just dont want to be driving and kill the motor because of something simple that I could have fixed.

I hate hunting down exhaust leaks when they are not big leaks. Sometimes they can be almost impossible to find. For my sake I hope it is just a leak that I over looked. If not ive got like 500 extra lifters and push-rods.

One last quick question......Will a valve make a noise if it is going bad????????????????????????????

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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post #4 of 10 (permalink) Old 10-02-2011 Thread Starter
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So, its definitely not an exhaust leak....

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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post #5 of 10 (permalink) Old 10-02-2011 Thread Starter
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i suppose i will take the valve covers off when i get a chance and see if i can find anything wrong.

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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post #6 of 10 (permalink) Old 10-03-2011
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Bad lifter/bent rod or a rocker that needs to be adj.

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post #7 of 10 (permalink) Old 10-04-2011
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I have to agree spdjnky_42, about checking your lifters it does sound like a lifter gone bad.

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post #8 of 10 (permalink) Old 10-04-2011 Thread Starter
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Im thinking the same thing. I did pull the valve cover and the rods and rockers looked good, but to be on the safe side I replaced them with some that I had in the garage ( both lifters and rockers) and I still have the same noise. So this weekend Im going to pull my headers off to check for any small crackes or suspect areas and replace the gaskest as well and see if that does the trick before I have to mess with the lifters.

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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post #9 of 10 (permalink) Old 10-07-2011 Thread Starter
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Well I pulled my exhaust headers off and the flanges are warped to high hell.......so Im hoping thats what was causing my little tick but Im still not so certain because with the amount of warp, the noise, if it was/is coming from the headers should be loud as heck....I put my stock mani's back on to see if that fixes the tick but I wont know until tomorrow but I will let you guys know.

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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post #10 of 10 (permalink) Old 10-08-2011 Thread Starter
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Well....I checked out the lifters and they all look fine....could a bent valve cause a faint ticking noise?

96 explorer motor, tubular UCA and LCA, bbk shorties, 2 1/2 h-pipe, 3.73 gears.
13.73 @ 104.00, 2.24 60'
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