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Old 06-27-2010, 10:12 PM   #1
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Tune up and engine bay questions

Well after wondering where the *@*# the spark plugs were I did some reading and found they were under this "power strip" thing.

Anyway, I want to do a tune up on this thing and had a few questions:

1. What are the nub things on the top of the engine?
You can see one on the very last pic on this page that describes how to change the plugs:
Jeep Horizons :: Change Your Spark Plugs

2. Is it recommended I clean the throttle body? Any specific type of cleaner necessary? I read somewhere that said not to use a solvent based cleaner, use a detergent based one instead...whatever that means. Any thoughts on this? I want to clean the AIC too - I would assume whatever I would use to clean the throttle body cleaner here too?

3.) Any specific plugs I should use?

4.) Anything else I should do?

Thanks all!

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Old 06-28-2010, 08:45 AM   #2
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Look on the underhood label - left side firewall. It tells you what plugs to use.

Tip - to get to the front plug, a swivel helps. When putting in the new one, slip a vacuum hose over the plug end, then use it to get the threads started at least 2 turns - it helps prevent crossthreading.

There are throttle body spray cleaners at the parts house - don't use carburetor cleaner.

Nubs?

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Old 06-28-2010, 08:55 AM   #3
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in the last pic, he is putting dielectric grease inside the spark plug boot. is that the nub you are referring to?

On the plugs, there are 2 schools of thought.
1. Use only what the vehicle manufacturer says to use
2. double platinum(for coil on plug jeeps only) autolite, or champion work well, and last longer than OEM plugs. (search and you'll find the part numbers I can't remember them at the moment)
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Old 06-28-2010, 09:46 AM   #4
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Part numbers for the two plugs recommended by mrcarcrazy are the Autolite APP985 (NOT the AP985!) and Champion 7034. X2 on that recommmendation, especially since the newer engines are very picky about the spark plugs they get.

For a throttle body cleaner, just make sure it says throttle body cleaner on the label, or throttle body and carburetor cleaner. Those labeled only carburetor cleaner are not recommended.
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Old 06-28-2010, 10:48 AM   #5
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Quote:
Originally Posted by rrich View Post
Look on the underhood label - left side firewall. It tells you what plugs to use.

Tip - to get to the front plug, a swivel helps. When putting in the new one, slip a vacuum hose over the plug end, then use it to get the threads started at least 2 turns - it helps prevent crossthreading.

There are throttle body spray cleaners at the parts house - don't use carburetor cleaner.

Nubs?
The "nub" I am talking about is the black plastic thing sticking straight up in the air that is behind his hand.
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Old 06-28-2010, 10:56 AM   #6
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Quote:
Originally Posted by CubbieBlue View Post
The "nub" I am talking about is the black plastic thing sticking straight up in the air that is behind his hand.
Which picture?
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Old 06-28-2010, 11:27 AM   #7
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Quote:
Originally Posted by Jerry Bransford View Post
Part numbers for the two plugs recommended by mrcarcrazy are the Autolite APP985 (NOT the AP985!) and Champion 7034. X2 on that recommmendation, especially since the newer engines are very picky about the spark plugs they get..
(Not trying to hijack this thread, just curious)
I read on another thread that I should get the AP985, and NOT the APP 985

So was that information incorrect? If so, how badly do I need to yank out the AP985's that I put in saturday?

Quote:
Originally Posted by CubbieBlue View Post
The "nub" I am talking about is the black plastic thing sticking straight up in the air that is behind his hand.
I believe he's talking about the breather valve thing sticking out of the valve cover ( I can't for the LIFE of me think of it right now...must need more coffee!)
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Old 06-28-2010, 12:08 PM   #8
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this thing
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Old 06-28-2010, 12:13 PM   #9
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That is just the breather for the crankcase. It is not a PCV valve so it does not need to be replaced.

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