Spark Plug Question

[KaGee]

The Marina gave me MR43 A/C plugs.<br />The Seloc book calls for MR44's.<br /><br />I believe the only difference is heat range. According to Delco's website the second digit is the heat range, making the 44 a hotter plug than the 43.<br /><br />My motor is an '82 3.8L. I noticed from '85 on, all the SBC engines use MR43.<br /><br />Is this a big deal? I'm thinking not, but thought I'd throw it out for discussion.

 

[Elk Chaser]

Re: Spark Plug Question

ooops

 

[Elk Chaser]

Re: Spark Plug Question

Depends, how were your old plugs performing? (how did they look)<br /><br />May have to wait and see how the new ones perform.

 

[Don S]

Re: Spark Plug Question

OK, what's a 3.8 ? OMC, Merc? V6 or IL4?

 

[KaGee]

Re: Spark Plug Question

V-6 OMC<br />SBC...Small Block Chevy<br />Same as a 305, missing 2 cylinders, preceded 4.3.