post #1 of Old 03-21-2010, 10:55 AM Thread Starter
Xride
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What do I torque my Spark plugs to? 99 4.0l?

I can't seem to find the spec on how much to torque my plugs?
I have a 99 4.0.

Any help?


Thanks.


99 XJ, black, 4x4, NP231, 8.25 rear. Fully locked.
5.5" long arm lift, 35x12.5x15 Kumo KL71MT
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post #2 of Old 03-21-2010, 10:57 AM
Jameslol
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Wait you torque spark plugs? lol

I just tighten them down until they are snug, if you have a haynes manual it should tell you, if no one gives you a reply ill dig mine up and look for you.

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post #3 of Old 03-21-2010, 11:01 AM Thread Starter
Xride
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I dunno, can I just tighten them down? lol I figured they were something I should spec.

99 XJ, black, 4x4, NP231, 8.25 rear. Fully locked.
5.5" long arm lift, 35x12.5x15 Kumo KL71MT
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post #4 of Old 03-21-2010, 11:10 AM
93gc40
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You DON'T torque plug. You tighten them until the washer compresses.

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post #5 of Old 03-21-2010, 11:14 AM Thread Starter
Xride
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Quote:
Originally Posted by 93gc40 View Post
You DON'T torque plug. You tighten them until the washer compresses.
EVERYTHING has a torque spec.

How do I tell if the wash has compressed? How much is too much torque? With just the 1/2" ratchet its not hard to get over 100ft lbs of torque. This would be more important with an aluminum head.

The 99 has a cast iron head though right?

99 XJ, black, 4x4, NP231, 8.25 rear. Fully locked.
5.5" long arm lift, 35x12.5x15 Kumo KL71MT
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post #6 of Old 03-21-2010, 11:22 AM
CJ7-Tim
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Quote:
Originally Posted by Xride View Post
EVERYTHING has a torque spec.
True.

Spark plugs are torqued to 30ft/lbs (which is tighten until you get a light resistance (snug) and then turn the wrench handle 1/8 more of a turn).

A dab a of anti-seize compound is also a good idea.

.

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post #7 of Old 03-21-2010, 11:24 AM
grovesb2
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Quote:
Originally Posted by CJ7-Tim View Post
30ft/lbs (which is tighten until you get a light resistance (snug) and then turn the wrench handle 1/8 more of a turn).

A dab a of anti-seize compound is also a good idea.
Did my spark plugs yesterday at 30 ft/lbs and a dab f anti-seize. so +1 on what Tim said.

btw Haynes manual doesn't give you a spec in the description. I can't find a page with any torque specs really.
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post #8 of Old 03-21-2010, 11:37 AM Thread Starter
Xride
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Quote:
Originally Posted by CJ7-Tim View Post
True.

Spark plugs are torqued to 30ft/lbs (which is tighten until you get a light resistance (snug) and then turn the wrench handle 1/8 more of a turn).

A dab a of anti-seize compound is also a good idea.

Thank you

I have a tq wrench so I will get them all to spec.

Thanks again.

99 XJ, black, 4x4, NP231, 8.25 rear. Fully locked.
5.5" long arm lift, 35x12.5x15 Kumo KL71MT
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post #9 of Old 03-21-2010, 12:35 PM
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As long as they're not too loose so they don't eject when you're driving, you'll be all set!

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post #10 of Old 03-21-2010, 12:45 PM
djb383
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Some plugs have washers, some don't. Doesn't the package the new plugs came in refer to the proper way to tighten them???????
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post #11 of Old 03-21-2010, 01:28 PM
grovesb2
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Quote:
Originally Posted by djb383 View Post
Some plugs have washers, some don't. Doesn't the package the new plugs came in refer to the proper way to tighten them???????
I have the Champion box in my hand from yesterday. It states:

Quote:
With Gasket: Tighten 1/2 turn. Without gasket: Tighten 1/16 turn.
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post #12 of Old 03-21-2010, 02:02 PM
Wearingthin
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FSM for 01 says

Tighten the spark plugs to 35-41 Nm (26-30 ft.
lbs.) torque.



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post #13 of Old 03-21-2010, 02:04 PM Thread Starter
Xride
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Quote:
Originally Posted by Wearingthin View Post
FSM for 01 says

Tighten the spark plugs to 35-41 Nm (26-30 ft.
lbs.) torque.


Alum head though.



Is this what my old plugs should look like? They all looked more or less the same.

99 XJ, black, 4x4, NP231, 8.25 rear. Fully locked.
5.5" long arm lift, 35x12.5x15 Kumo KL71MT
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post #14 of Old 03-21-2010, 04:08 PM
CJ7-Tim
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All Cherokees have cast iron heads.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
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post #15 of Old 03-21-2010, 05:19 PM
tjwalker
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How many miles were on those plugs? What was the gap? Looks like they were ready to come out.....I go 30k on my plugs.

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