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Old 12-27-2008, 03:46 PM
5_speed's Avatar
1988 Dodge Dakota 318 Magnum
 
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Guess that sound, video inside.

http://www.youtube.com/watch?v=6lO8otj9Ts0

I got it all tuned up and tuned the carb the best I could with out a vacuum gauge (by ear.) New ignition system from rebuilt dist. to plugs. Running 93 octane. Just did the valve lash adjustment today and double checked it, everything is spot on. Around cylinder #7 there is some sort of ticking sound. Yes I realize it's hard to guess what a sound is, but I'm sure someone has heard this before.

Whats your guess / advice?

Thanks
_Brett

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Old 12-27-2008, 04:03 PM
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How are your header gaskets? I know you did not remove them to do your plugs.

A leak can sound very much like ticking in the valve train.
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Old 12-27-2008, 04:08 PM
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My brother suggested it was an exhaust leak also, if it helps any.. I can hear that exact same ticking sound if I go listen by the muffler exit. It's just a little quieter coming through the exhaust.

The car came with new Mr. Gasket copper header gaskets, I am debating on installing them or not. I don't see any smoke in the engine bay, but then again if the leak is tiny I suppose I wouldn't right?
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Old 12-27-2008, 04:17 PM
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Nah.. You won't see any smoke.

The gaskets are easy to do.
Most are made so that if you take all the bolts off the header except the one on each end, You can just loosen those and the gasket lifts up and out the top.
If you look at your new ones, the end holes should look like hooks. They just drop in from the top. You never take the header off completely.
When you tighten the bolts start from the center and work your way to the outside.
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Old 12-27-2008, 04:29 PM
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*Edit*

Embossed (bump side) faces header / manifold.

Torque specs per repair manual says 25 lb-ft and hedman hedders says don't exceed 27 lb-ft so I'm going to install the gaskets tomorrow with 25-lb-ft and report back to see if that took care of the problem.

Thanks!

Last edited by 5_speed; 12-27-2008 at 08:43 PM.
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Old 12-27-2008, 08:41 PM
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Sound is exhaust leak,plug tailpipe noise should change, or pour some oil in carb look for smoke.
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Old 12-27-2008, 08:48 PM
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Hopefully I can eliminate the sound tomorrow if the weathers nice I'll swap header gaskets, and exhaust leak makes 100% sense. When I open the throttle and let it out, the exhaust pops, that only happened to me one other time when I had an exhaust leak on my old truck.
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Old 12-27-2008, 09:58 PM
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It's the duration of the noise that gives it away as a header leak. When you tighten the header flanges back, start from the center and work out, just like you would on a cylinder head.
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Old 12-27-2008, 10:00 PM
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As if you needed another opinion... header leak.
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Old 12-28-2008, 10:42 AM
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I just want to thank everyone for their helpful advice, I replaced the header gasket today and stopped the leak, the car is running better too. I really appreciate all of your time and effort everyone!

_ Brett
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Old 12-28-2008, 01:44 PM
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I know I'm a little late to weigh in here, but if something like that ever occurs again you can take a long screwdriver and press the handle to your ear and the other end to the valve cover. Its like a stethoscope...sorta. if it is valve train related (I know it wasn't, strictly hypothetical) you'll hear it, and you can even figure out what side and what general area, front or back, its coming from. its pretty cool even if there's no tick, try it out.
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Old 12-28-2008, 05:51 PM
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Thats a great idea man, thank you for the tip! I never thought about that, but it would work great come to think of it!

This forum is great
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Old 12-28-2008, 05:53 PM
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I came in too late sounds like you figured it out. However, Autozone sells a stethoscope for about $10. A bit more accurate than the screwdriver, and easier to hear sound.
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