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jeprice
Dodge Dakota
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10/21/2007
21:29:51
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 Subject: ticking and knocking
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I have a 99 dakota with the 3.9 in it reg cab 4x2.
the first problem is at start up there is a lifter that ticks for about the first block or two and then it quits ticking like its not getting any oil yet I have about 70-80 pounds of oil pressure,it only started doing this a couple of weeks ago and i have change the oil 3 times since i bought it in july. I do have an exuast leak but I do not think that is it. the other problem is when I go through large puddles like when going back to the hunting blind she starts makeing loud knocking sounds it goes away after a few minutes any ideas what this is? thanks
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pete
Dodge Dakota
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10/21/2007
22:24:40
|  RE: ticking and knocking
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be sure your exhaust is not leaking at cylinder head(s) and where dumps off into Y pipe begins and continue through the rest of your exhaust system then I would turn to the engine parts
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OBIO3
Dodge Dakota
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10/21/2007
22:59:13
| RE: ticking and knocking
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I Think both ticks or knocks are exhaust related. At cold start both heads and exhaust manifold are stone cold changing conditions as it warms up. Sounds like you may be moving right along when going through the deep water holes.I'm betting fast enough for water to reach the manifold cooling it off changing the match for a short while as the manifold heats back up and expands to reseal the leak some what.Have you checked for broking bolts where the manifold meets the head.
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jeprice
Dodge Dakota
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10/22/2007
00:52:30
| RE: ticking and knocking
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i have a bolt that broke off on the drivers side manifold that was holding the heat shield on is this the same bold that also holds the manifold on? if so that bolt seems offly long and thin for a bolt to hold the manifold on. thank you for the replies
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jeprice
Dodge Dakota
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10/22/2007
01:01:58
| RE: ticking and knocking
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would that exuaust leak also cause a lose of power
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OBIO3
Dodge Dakota
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10/22/2007
01:43:24
| RE: ticking and knocking
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That extra long bolt most likely originally had a spacer on it to hold the heat shield away from the manifold to allow cooling air to pass through. My guess is without that spacier the bolt bottoms out and doesn't tighten down on the manifold. This is guessing on my part as my rig is a 99 4x4 CC. But it all makes sense.
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Curly
Dodge Dakota
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10/22/2007
10:49:11
| RE: ticking and knocking
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"would that exuaust leak also cause a lose of power"
yes loss of back pressure
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KCWW
Dodge Dakota
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10/22/2007
21:55:26
| RE: ticking and knocking
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jeprice,
I have the same truck as you...'99 3.9 4x2 but mine's a club cab. Recently, when I completed a tune up, I noticed that the same bolt is broken on my exhaust manifold as well. (rear most manifold bolt on the driver's side). I noticed the heat shield was loose...not sure if it holds on the manifold as well. The bolt was rattling some so I checked further and found a washer/spacer of some sort on the end of the bolt and took it off...end of rattle.
I'll be watching this post to see if someone will have the answer on whether or not this bolt also hold on the manifold. The position of the bolt will make it very difficult to drill out the broken part...not looking forward to that!
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1hotkadota
Dodge Dakota
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10/23/2007
13:55:24
| RE: ticking and knocking
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Dude, I have an 02 4.7 RC and I had the same exact problem, except it was the passenger side manifold. Those long thin bolts do hold the heat shield and manifold on to the block. And OBIO3 was right about the heat sealing the leak when your truck warms up. If you want, you can go to the stealership and get some new ones for about 2.50 or so a piece. Thats what I did and all was fixed. Just don't forget the new gasket:)
KCWW, you won't have to drill out the bolt because it sticks out far enough that when you remove the manifold, you can just turn it out by hand. And yes, it holds the manifold to the block.
Remember guys, if you have the time and tools, you could always port and polish the insides of your manifolds and make them real smooth for good flow. I did this and thought it helped out as much as removing the clutch fan.
Have fun guys!
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