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Dodge Dakota Climate Control

121 messages,  Last post on Sep 03, 2008 at 3:07 PM

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#77 of 121 Re: Dodge Dakota 2002 Overheating [bpeebles] by tommy63 Sep 20, 2007 (9:10 pm)
Replying to: bpeebles (Sep 20, 2007 6:39 pm) Mr., Peebles I wanted to let you know that through your advice my truck is now back on the road. I did the burp thing as you advised, put an identical thermostat in truck to the one I took out, and all is well with my Dakota. Sir, I appreciate all the advice/help you gave in getting my truck fixed. THANK YOU SO VERY MUCH. I do have one more question. Why is the 4.7L called a semi hemi? Replies to this message: bpeebles (Sep 21, 2007 6:06 pm) tommy63 (Sep 22, 2007 9:23 pm) dustyk (Sep 24, 2007 3:51 pm)
#78 of 121 Why is the 4.7L called a semi hemi? [tommy63] by bpeebles Sep 21, 2007 (6:06 pm)
Replying to: tommy63 (Sep 20, 2007 9:10 pm) That is an easy to answer question...   First of all, lets review why an engine would be called a "Hemi" in the first place. The term "Hemi" is slang for "Hemisperical". In a piston engine, the area from the top of the piston to the top of the cylinder head by the valve heads is known as the combustion chamber (this is actually just an area of air!). The combustion chamber on most overhead valved AUTOMOTIVE engines are either wedge shaped (think of a piece of pie) or hemispherical (think of tennis ball cut in half). The cylinder head design dictates the combustion area shape, so when someone says "hemi", it really only refers to the engine's cylinder head having a hemispherically shaped combustion chamber.   Hemi heads have the spark plug located at dead center of the combustion chamber, which makes for an extremely efficient & powerful fuel/air mixing & flame burn (actual igniting of the fuel/air). Hemi heads also have ideal valve placement to help the flow of air (intake & exhaust) through the cylinder head. In simple terms, the head design is VERY efficient, and allows an engine to make excellent power! On the downside, hemi heads themselves usually are quite heavy & large, and valvetrains can be somewhat complex (read: expensive).   The 4.7L engine is a "semi Hemi" because the head is almost a perfect sphere... except for a small bump.   Here are some links which further describe the 4.7L semi-hemi http://www.allpar.com/mopar/47.html http://www.thehemi.com/news.php?id=20020826-1 Replies to this message: tommy63 (Sep 22, 2007 9:23 pm) dustyk (Sep 24, 2007 3:51 pm)
#79 of 121 Re: Why is the 4.7L called a semi hemi? [bpeebles] by tommy63 Sep 22, 2007 (9:23 pm)
Replying to: bpeebles (Sep 21, 2007 6:06 pm) Mr., Peebles Thanx for the explanation on the engine. My wife said to tell you Thanx very much for the help in getting our truck fixed. Again, Thank You. Replies to this message: dustyk (Sep 24, 2007 3:51 pm)
#80 of 121 Re: Why is the 4.7L called a semi hemi? [tommy63] by dustyk Sep 24, 2007 (3:51 pm)
Replying to: tommy63 (Sep 22, 2007 9:23 pm) As an aside to Bpeebles excellent explanation, when Chrysler first developed the "semi-hemi" combustion chamber in the 1950s, they were referred to as polyspherical engines, meaning they used a combination of wedge and hemispherical designs.   Regards, Dusty
#81 of 121 blower motor switch by magnummark Dec 07, 2007 (8:33 pm)
Hello all 94 dakota 318 w/air 2wd short story... blower motor worked only on high. then it didn't work at all. the way it happened i'm pretty sure it is the speed control. checked resistance on it but without documentation for the terminals.... help me please!!!! Replies to this message: rolandtignor (Dec 08, 2007 6:29 pm) bpeebles (Dec 08, 2007 8:55 pm)
#82 of 121 Re: blower motor switch [magnummark] by rolandtignor Dec 08, 2007 (6:29 pm)
Replying to: magnummark (Dec 07, 2007 8:33 pm) It's your fuse relays. My blower wouldn't even work. Mine was on the outside firewall in the engine compartment on the passenger side. I hope that helps. Thanks
#83 of 121 Re: blower motor switch [magnummark] by bpeebles Dec 08, 2007 (8:55 pm)
Replying to: magnummark (Dec 07, 2007 8:33 pm) Check the Blower resistor - that is the most common failure for blower motor issues. It is the resistor which determines all the fanspeeds.
#84 of 121 Re: 01 Dakota Fan speed help. [bpeebles] by nanell Dec 12, 2007 (11:40 pm)
Replying to: bpeebles (Apr 29, 2007 3:27 pm) HI- I have a '94 dakota and had the same problem had the heater/ defrost on and it just stopped blowing. Have searched the archives and did as suggested. Replaced the resister (only $7). Didn't fix the problem, so then I pulled out and tested the blower motor. Tested fine as well (but Hubby replaced it anyway ($60)). But at last it still will not work. Any other suggestions. It is so cold we need it daily.   Thanks Replies to this message: dakota968 (Dec 13, 2007 6:27 am) terrys2 (Dec 13, 2007 4:01 pm) nanell (Dec 13, 2007 10:52 pm) nanell (Dec 17, 2007 4:50 pm)
#85 of 121 Re: 01 Dakota Fan speed help. [nanell] by dakota968 Dec 13, 2007 (6:27 am)
Replying to: nanell (Dec 12, 2007 11:40 pm) I would be rather shocked that the resistor replacement didn't fix the problem. Try pulling out the resistor and putting it back in a few times to engage the pins. I would also suggest checking the new resistor to make certain that the new part wasn't defective. And, I would suggest describing the complete scenario of what/how much of functionality you have, when and how it stopped working, etc. There are some really savey people on this forum that can trouble shoot based on a very concise description of the problem. And definitely check ALL fuses that could be related (in the regular fuse panel, as well as, the panel in the engine compartment). Good Luck.
#86 of 121 Re: 01 Dakota Fan speed help. [nanell] by terrys2 Dec 13, 2007 (4:01 pm)
Replying to: nanell (Dec 12, 2007 11:40 pm) Try wiggling the wires as they go into the connector at the resistor. Do this for all fan speeds. The wires where they crimp onto the terminals in the connector can burn into. It is hard to see this down in the connector. If the blower tries to run when the wires are wiggled you need to install a replacement connector. Be sure to use the largest wires that come with the new connector. Replies to this message: nanell (Dec 13, 2007 10:52 pm) nanell (Dec 17, 2007 4:50 pm)

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