Cast Iron heads??

[GreeCguy]

Greetings and good afternoon to all in the land of the great Bitog:

"Thunder the Wonder Pig" is going to get some new sparky plugs so it will be more sparky. Said plugs are purchased already. However, I got to thinking, do I have to let the engine cool before I replace the plugs, (i.e. are the heads in my motor like the newer Ford heads and will strip if replaced while hot), or are they good old American ole fashion cast iron heads and therefore it doesn't matter if it's hot or cold?

Said vehicle is a 1995 Oldsmobile Cutlass Ciera with the 3.1 V-6.

I'd like to do this before the sun goes down in these parts which from this posting gives me about two hours.

Thanks - GreeCguy

 

[spasm3]

If its an L82 its aluminum heads. I always change plugs in aluminum heads when they are stone cold.

 

[MolaKule]

I would also chase the threads with a thread chaser just make sure your torque readings are correct when installing plugs.

 

[The_Eric]

They're aluminum heads, change while warm or cooler.

 

[Donald]

Typically changing plugs when the engine is hot means burned fingers.

 

[eljefino]

Originally Posted By: MolaKule
I would also chase the threads with a thread chaser just make sure your torque readings are correct when installing plugs.


Probably takes washer plugs that are hard to screw up.

 

[crazyoildude]

change the plugs when cold.

 

[The_Eric]

Originally Posted By: eljefino
Originally Posted By: MolaKule
I would also chase the threads with a thread chaser just make sure your torque readings are correct when installing plugs.


Probably takes washer plugs that are hard to screw up.


No, they take a taper seat plug.

 

[dailydriver]

Originally Posted By: MolaKule
I would also chase the threads with a thread chaser just make sure your torque readings are correct when installing plugs.


Oh that I wish I had enough room/access to do both of the above (chase threads and torque the plugs) on an LS1 in a 4th gen f body's engine bay!!

 

[jk_636]

Wait until that vehicle is "as cold as ice, or one day you'll pay the price I know...seen it before it happens all the time..."

No seriously, let it cool down then you should be fine.