# Pull spark plugs with hot motor? **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [May 8, 2011, 6:41pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501 "2011-05-08T18:41:46Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [May 8, 2011, 6:41pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/1 "2011-05-08T18:41:46Z")
Are the plugs going to come out easier with a hot or cold motor ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [May 8, 2011, 6:50pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/2 "2011-05-08T18:50:07Z")
if they’re in so tight that it’s a problem either way, you overtorqued them last time. ---
**Author:** ![meaneyedcatz](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/meaneyedcatz/32/692_2.png) [@meaneyedcatz](https://community.cartalk.com/u/meaneyedcatz)\ **Post date:** [May 8, 2011, 6:50pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/3 "2011-05-08T18:50:39Z")
Cold. If the head is aluminum the threads could be damaged when pulling when hot. Also it is easier on your fingers and arms to work on a cold engine, flesh burns are very painful. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [May 8, 2011, 7:00pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/4 "2011-05-08T19:00:39Z")
i have never looked at them since i bought the vehicle. Seeing as how im to lazy to get up im going to ask if anybody knows if 95 jeep has aluminum head? ---
**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\ **Post date:** [May 8, 2011, 7:04pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/5 "2011-05-08T19:04:37Z")
The aluminum thing is not all that relevant, only b/c if I had a choice I’d do them cold no matter what. I’d say the aluminum question is relevant only if there is some reason that you **must** pull them while hot. ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [May 8, 2011, 7:16pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/6 "2011-05-08T19:16:55Z")
If it is an aluminum head, the aluminum will expand more than the cast iron used in the plug body so the plug will come out easier if the engine is hot. However, due to burn danger, I would pull them cold, only do hot as a last resort. I wonder if the OvGlove would help prevent burns. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [May 8, 2011, 7:57pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/7 "2011-05-08T19:57:06Z")
Im a big boy i can handle a hot engine but i b doin em cold. Thanks ---
**Author:** ![karl-sieger](https://avatars.discourse-cdn.com/v4/letter/k/c77e96/32.png) [@karl-sieger](https://community.cartalk.com/u/karl-sieger)\ **Post date:** [May 8, 2011, 8:41pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/8 "2011-05-08T20:41:10Z")
Spark plug threads are steel. The female threads in an aluminum head are almost always–you guessed it–aluminum. Softer than steel. Hot aluminum threads can “smear” when the spark plug is unscrewed. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [May 8, 2011, 9:00pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/9 "2011-05-08T21:00:23Z")
Copy that ---
**Author:** ![bedrock](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bedrock/32/868_2.png) [@bedrock](https://community.cartalk.com/u/bedrock)\ **Post date:** [May 8, 2011, 9:42pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/10 "2011-05-08T21:42:28Z")
if plug are tight spray a little (P.B BLASTER) in well let sit overnight.it help me out. ---
**Author:** ![piter\_devries](https://avatars.discourse-cdn.com/v4/letter/p/aca169/32.png) [@piter\_devries](https://community.cartalk.com/u/piter_devries)\ **Post date:** [May 8, 2011, 9:42pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/11 "2011-05-08T21:42:35Z")
Perhaps you could compromise and go with warm. ---
**Author:** ![oblivion](https://avatars.discourse-cdn.com/v4/letter/o/3ab097/32.png) [@oblivion](https://community.cartalk.com/u/oblivion)\ **Post date:** [May 8, 2011, 11:44pm UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/12 "2011-05-08T23:44:06Z")
I’d pull them cold. Just be careful and if one doesn’t want to come out, don’t force it. Instead, loosen it a little, tighten it a little, repeat until you can ease it out of the head, even it it takes a while. Don’t overtighten the new plugs, and use some anti-seize compound to make it easier the next time. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [May 9, 2011, 12:20am UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/13 "2011-05-09T00:20:00Z")
Anti-seize on the plugs…I use anti-seize on everything including wheel lugs as it helps to tighten. Engine heat wont void anti-seize properties? (wasnt sure how else to say that) ---
**Author:** ![bluboytoy](https://avatars.discourse-cdn.com/v4/letter/b/f4b2a3/32.png) [@bluboytoy](https://community.cartalk.com/u/bluboytoy)\ **Post date:** [May 9, 2011, 12:46am UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/14 "2011-05-09T00:46:55Z")
spark plugs should not be removed with engine hot, especially on aluminum engines. risk of damaging the threads on the cylinder head can occur. ---
**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\ **Post date:** [May 9, 2011, 12:57am UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/15 "2011-05-09T00:57:11Z")
Your Jeep has cast iron head/s, whether it’s the 4.0 liter or the 5.2. I’m assuming you have the Grand Cherokee. As a side note them plugs are due for replacement every 30k. ---
**Author:** ![badbearing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/badbearing/32/10683_2.png) [@badbearing](https://community.cartalk.com/u/badbearing)\ **Post date:** [May 9, 2011, 1:12am UTC](https://community.cartalk.com/t/pull-spark-plugs-with-hot-motor/64501/16 "2011-05-09T01:12:57Z")
4.0