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Spark Plugs: Best '89 5.0 302 choice

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Old 05-21-2018, 01:43 PM
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Question Spark Plugs: Best '89 5.0 302 choice

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?
 
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Old 05-21-2018, 03:04 PM
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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.
 
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Old 05-21-2018, 10:41 PM
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My choice, good old standard Motorcraft copper. I don't waste money on the fancy plugs, they don't last any longer than these
 
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Old 05-22-2018, 10:36 AM
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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.
 
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Old 05-22-2018, 02:10 PM
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Thanks all! How would i check the heat rating on the motor or is that even important?
 
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Old 05-22-2018, 02:48 PM
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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.
 
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Old 05-22-2018, 03:09 PM
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Originally Posted by jeffreyclay View Post
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??
 
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Old 05-22-2018, 03:44 PM
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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.
 
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Old 05-22-2018, 04:04 PM
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Originally Posted by Clubwagon View Post
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.
 
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Old 05-22-2018, 07:10 PM
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Originally Posted by baddad457 View Post
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.
 
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Old 05-22-2018, 09:19 PM
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Originally Posted by Clubwagon View Post
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.
 
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Old 05-22-2018, 10:07 PM
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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..
 
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Old 05-23-2018, 08:23 AM
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Originally Posted by annaleigh View Post
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.
 
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Old 05-23-2018, 09:42 PM
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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
 
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Old 05-23-2018, 09:50 PM
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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??
 
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