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  #1  
Old 04-20-2010, 07:54 AM
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Default Please help with loud tick!

Alright well I thought I had a problem with a rocker popping but maybe that isn't it. It has a semi rough idle with the CEL on so I took my truck to get an OBD scan and I got P0385 which for some reason it was giving me an #8 misfire. I thought p0308 was #8 anyways. I replaced all the spark plugs and the coil for cylinder #8. CEL is now gone but now I have this loud ticking noise inside my intake. Hopefully you guys could please help me figure this out so I can get my truck back on the road thanks guys. Here is a video to maybe help with the issue.

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Old 04-20-2010, 09:37 AM
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Kind of hard for me to tell with laptop speakers. Have you disabled the cylinders one by one to see if the noise changes? If you have and the noise remains unchanged, then I would look into the secondary hydraulic chain tensioners and and guides as a source of the noise. As for the P0385, I don't know where that came from as it isn't a code used by Chrysler for your truck. Your assumption of the P0308 being a #8 misfire is correct.

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Old 04-20-2010, 01:18 PM
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That is a Valve!!
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Old 04-20-2010, 01:20 PM
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Sounds like you may have carbon build up on the seat of the valve and that's causing it clap or either you have a weak lifter.
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Old 04-20-2010, 01:31 PM
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After looking it appears you have the twin overhead cam 318 and there are no lifters. I'd check the valves and then rule out the main bearings. See if the sound can be heard from the oil pan and also see if you have metal shavings in your oil. Plus I would also check the timing chains themselves. Sometimes the actual site of the problem is not where you hear the noise escaping from.
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Old 04-20-2010, 01:33 PM
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An actual stethoscope is a mechanics best friend and they are cheap. If you don't have one get one it helps so much to find the actual location of engine sound. Our ears can be very deceiving because we hear in stereo, what you need is pin point precision.
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Old 04-20-2010, 02:10 PM
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Quote:
Originally Posted by jimbo View Post
After looking it appears you have the twin overhead cam 318 and there are no lifters. I'd check the valves and then rule out the main bearings. See if the sound can be heard from the oil pan and also see if you have metal shavings in your oil. Plus I would also check the timing chains themselves. Sometimes the actual site of the problem is not where you hear the noise escaping from.
Say what? Chrysler doesn't make a DOHC V-8. What you see is the SOHC 4.7L which utilizes cam followers, spring buckets and hydraulic lash adjusters. I've seen similar cases that have turned out to be tensioner noises. In fact I went through this with another member a while back.

http://www.ramforumz.com/showthread.php?t=43203

Last edited by RamTech; 04-20-2010 at 02:34 PM.
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Old 04-20-2010, 10:47 PM
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WTH I'm lost so i attempted to do a Seafoam additive to clean things out hoping that maybe I just had a lazy valve or something but the issue still continues. The tensioners are fine no issues there anymore ideas? Would taking off my intake show me anything under there to maybe fix replace etc? I havent taken off the intake yet please let me know if that would be an option also.
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Old 04-21-2010, 10:28 AM
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Quote:
Originally Posted by Remerson228 View Post
Say what? Chrysler doesn't make a DOHC V-8. What you see is the SOHC 4.7L which utilizes cam followers, spring buckets and hydraulic lash adjusters. I've seen similar cases that have turned out to be tensioner noises. In fact I went through this with another member a while back.

http://www.ramforumz.com/showthread.php?t=43203
Chrysler offered the 318 with overhead cams instead of a single cam in the valley. They did away with the push rods and used direct connect with the rollers and the valves. Dual means MORE THAN ONE, it doesn't always mean two in the same head. The 4.7 has one cam per head unit. Tensioner noise doesn't tick, it has a totally different sound when using a stethoscope, I have worked on several crappy Dodge and Chevy engines with that very issue. The Olds 3800 was the worst. You'll hear chain noise inside the casing as well as a slapping noise. My other question to the owner is , if it is tapping as hard as it sounds why hasn't the "Knock Sensor" picked it up? IF the 4.7 even has one.
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Old 04-21-2010, 01:41 PM
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Quote:
Originally Posted by jimbo View Post
Chrysler offered the 318 with overhead cams instead of a single cam in the valley. They did away with the push rods and used direct connect with the rollers and the valves.
What application used an OHC 318? I've never even heard of that engine, much less seen one. Not saying it didn't exist, I'd just be curious to know when and what it was used in. The only OHC V-8 I know of is the 4.7.
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