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Engine Ticking

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I have a 66 convertible with a 289 engine and a C4 transmission. There is this annoying tick-tick-tick from the engine. You don't here it when driving with the top down, but you do when it is up. Of course it is quite obvious with the hood open. I still have the 'soft' valve seats, and I use lead substitute every other tank or so. Any Ideas on how to get this to go away. A mechanic friend of mine said to put Miracle Oil in for a few weeks prior to an oil change. Is this a good idea? Will it Help?

Thanks in advance for any help you can give me.
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I've heard that Miracle Oil can, indeed, work some miracles. It wouldn't hurt to try it. My dad is a Mopar guy, but helps me alot with my "Stang (couldn't do it without him). He said he's heard of using the Miracle Oil before. It helps cushion the seats. But, it's probably a bad lifter?

Sounds like one of your lifters is either out of adjustment or has gone bad.

Member: Slightly Modified
66 fastback 351W
Try Marvel Mystery Oil first. One of the primary reasons old engines will develop lifter noise is because the lifters get gummed up and "stick". This just means they wont move through the entire travel anymore. When they finaly get to the point of not being able to "close the gap" lots of times you can desolve the gunk on them with MMO or a comparable product, and they will then travel farther and take up the slop as designed.

IMHO this is always caused by sombody not changing the oil at the proper intervals and/or using cheap oil. If, in fact, you do get the lifter unstuck by this method, the longterm solution is to change the oil at 2-3000 miles and use good quality oil.

Of course all at means very little if you have a hard mechanical failure in the valvetrain.............. *G*.

Love hard, drive fast, wear your seat belt.

PS, that's my 'bird...... My Mustang is too ugly to take pictures of yet........*G*.
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i've also heard of the marvel oil trick. i've also
heard of using ATF. if those don't work, it could be
that you need to adjust your valvetrain as others have
mentioned or that you have an exhaust leak. try and
buy a stethescope to pinpoint the problem.

65 2+2, 289 (early A code), c/r toploader, magna suspension, centerline convo pros
Columbo had, I should say has, the same problem with his 289. A few weeks ago I assisted him while he adjusted the rockers to get rid of the clattering sound they make when the hydraulic lifters can't take all the play anymore. It was really messy and smokey - the card board did not really prevent the oil from dripping on the exhaust manifold.
In the end we hadn't achieved anything. The ticking sound was still there.
Somewhat later the heater core was out for repair and the tick sounded more like 'chick' (no jokes please, I just mean the sound of that word). Sounds to me like a defective PCV-valve, or am I wrong?
I had the same problem with the 289 in my '66 Conv. My mechanic said it could be a noisy lifter, but that he had seen the same problem caused by a bad fuel pump. I chose to replace the fuel pump first, and the noise was gone !
Get yourself a piece of PVC pipe (3/4-1") about 2-3 foot long. With the engine running, put the PVC pipe up to your ear and start moving the other end over the engine. This will hlep you determin exactly where its coming from. Ticking can be anything from a lifter, to a tiny exhaust leak, to a bolt head tapping the bellhousing, to a wrist pin wearing out, to a rod bearing wearing out, to a worn pushrod...endless.

Find it first, then you more likely to diagnose it and fix it first try.

1970 Fastback, 4V 351C, various colors with black interior
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