Hi FTE world

I'm looking for peoples input here. I am changing out my spark plugs on the E150 (1989 with 5.0 302 engine) and when i went to the autoparts store they suggested NGK iridium LX spark plugs #7559.

Is this a good choice? What do you use? Which is the Best? Worst? and what is the proper heat range for this van?

 

I had a '96 E150 5.0 for many years. I used several brands of plugs but always went back to Motorcraft platinum.

NGK makes great plugs. I use them in both of my Toyotas. Can't imagine they wouldn't be fine in the 5.0.

As a side note: The Motorcraft Platinum plugs would typically outlast the distributor cap and wires.

 

My choice, good old standard Motorcraft copper. I don't waste money on the fancy plugs, they don't last any longer than these

 

Motorcraft copper is best. Irridium and platinum will not last and I find the aftermarket brands are hit and miss. Also do not use those plugs with a screw on tip, it's just something else to work lose and create a misfire.

 

Thanks all! How would i check the heat rating on the motor or is that even important?

 

If your engine is burning oil you might want your plugs to be 1 heat range hotter to burn the ash left on the plug tip from the oil. Otherwise run the standard heat range.

 

how can i tell what my standard is??

 

Do you have a service manual? There will be plug specs there.

I did use the platinum plugs because they do last longer and it was a PITA to change the front two plugs on my van. So the less frequent the better.

 

If you're talking about # 1 & 2 they're easy once you remove the alternator and air box.

 

Ha! My van was a '96 5.0. You had to remove the airbox to do most anything. And I could change those two plugs in the time it took to remove the alternator.

 

Little tighter with a 351.

 

I use the motorcraft copper. The left side is easy to access with the doghouse off.the right side rear 2 are easy to reach. I got the front two in the right side from the right wheel well using a long extension. May have also used a swivel socket.. I also did a compression check at the same time and those 2 on the front right were fairly easy to access from the wheel well. I don't remember if I jacked it up and took the wheel off or not..

 

At least on my van, I could reach in over the tire with the extension. Didn't have to jack the van.

 

looks like my gap is 0.042 - 0.046 ASF -24C is the motorcraft copper core they recommended but still couldn't find any heat range info on that

 

https://www.ngk.com/Spark-Plugs-NGK-c593.aspx

and at the autoparts store, it says these ngk parts it my 5.0 302 engine, but theyre listed gap is 0.054 where mine from the sticker above is 0.042 - 0.046

is there something im missing??