Gonna change my plugs this weekend. My question is how difficult is it on the 4.6 motors. I've done it a hundred times on my 5.0's. Never changed them on the newer stangs. Any hints, suggestions or problems I may run into. Also gap and what do you recommend for a plug. Thanks
Spark plugs
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Nater
New Member
NGK plugs work great in our cars. I have not had any problems with them. I would stick to the regular copper ones. Since I note that you have nitrous, I'm not sure if you need to go to a colder plug with less of a gap.
Changing the plugs is easy on the driver side bank, a little trickier on the passenger side. All that is required is to take the COP off, get an extension and take the plug out. I would recommend blowing a lot of air down in the chamber (before removing the plug) to blow out any dirt that has accumulated down there. On the passenger side, you would need to remove the plastic air intake tract from the throttle body and go to work.
Changing the plugs is easy on the driver side bank, a little trickier on the passenger side. All that is required is to take the COP off, get an extension and take the plug out. I would recommend blowing a lot of air down in the chamber (before removing the plug) to blow out any dirt that has accumulated down there. On the passenger side, you would need to remove the plastic air intake tract from the throttle body and go to work.
RandyStinchcomb
New Member
my advice, (given the track record of threads pulling/stripping out of the heads) take it to a shop and have it done, that way if THEY strip the threads or it happens later on down the road, it falls in their lap, not yours. now if you must DIY, then make sure the engine is stone-cold, to avoid the stripping the threads out of the heads which is a BIG problem on these cars.
Nater
New Member
Forgot to mention to do it when the engine is cold (as previously mentioned), put anti-seize on the threads and torque to 12ft/lbs. I've done it many times with no issues.
Plugs should be Motorcraft AGSF-32C gapped at .054
Use silicone spray on the COP boots to clean and condition and ensure a good seal
Use silicone dielectric grease on the plug to spring connection
Torque plugs to 12 foot pounds and check the torque in 30 days
Blow out plug well before removing plug
Read these articles:
http://www.bullittarchive.com/html/modules/articles/article.php?id=118
http://www.bullittarchive.com/html/modules/articles/article.php?id=45
http://www.bullittarchive.com/html/modules/articles/article.php?id=83
http://www.bullittarchive.com/html/modules/articles/article.php?id=42
http://www.bullittarchive.com/html/modules/articles/article.php?id=46
http://www.bullittarchive.com/html/modules/articles/article.php?id=30
Use silicone spray on the COP boots to clean and condition and ensure a good seal
Use silicone dielectric grease on the plug to spring connection
Torque plugs to 12 foot pounds and check the torque in 30 days
Blow out plug well before removing plug
Read these articles:
http://www.bullittarchive.com/html/modules/articles/article.php?id=118
http://www.bullittarchive.com/html/modules/articles/article.php?id=45
http://www.bullittarchive.com/html/modules/articles/article.php?id=83
http://www.bullittarchive.com/html/modules/articles/article.php?id=42
http://www.bullittarchive.com/html/modules/articles/article.php?id=46
http://www.bullittarchive.com/html/modules/articles/article.php?id=30
BooWFO
New Member
With the nitrous they really seem to like NGK tr6's .
After doing them once you'll never want to do them on a 5.0 again. It's that much easier.
After doing them once you'll never want to do them on a 5.0 again. It's that much easier.
I know everyone recommends copper plugs but I prefer platinums.
When I used autolite 764 copper's, I did not notice any change peformance but lost around 2 mpg with my usual driving.
I saw a set of 8 autolite 764 platinums on ebay for $7 shipped so I figure I should try them out. When I used the platinums, I gained back the 2 mpg that I lost. An performance was the same.
When I used autolite 764 copper's, I did not notice any change peformance but lost around 2 mpg with my usual driving.
I saw a set of 8 autolite 764 platinums on ebay for $7 shipped so I figure I should try them out. When I used the platinums, I gained back the 2 mpg that I lost. An performance was the same.
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