Changing plugs on 172?

[Cup-pa]

My car has started misfiring under load and the toxic fume light has come on and stayed on. Want to try changing my plugs to see if this cures it but question is, how do you get to them? Do you have to remove the top head bit (if thats what its called) to access them?

Not great at mechanics as you might have guessed

 

[Fred@BTM]

plenham chamber (the bit with Renault sport on) has to come off

7 x 10mm bolts, a few pipes, and a few connectors

 

[Cup-pa]

Excellent, cheers Fred.

 

[Fred@BTM]

and make sure you use the correct plugs (NGK PFR6E-10, i think)

don't go putting anything else in there

 

[Cup-pa]

Ok, cheers for that. Going to have the top off and see if there is any water etc first but will make sure i replace with those if i do change them.

 

[dave1980]

just what i needed to know, i have Bosch Super 4's will they be ok?

 

[agil]

and make sure you use the correct plugs (NGK PFR6E-10, i think)

don't go putting anything else in there

Hello Fred, what happen if you install a diferent plugs?
some days ago I decided to change my plugs, went to dealer and gave me NGK BCP5ET with three electrodes I told to the guy this are not the correct plugs for the RS he told me you can use it with no problem, I said no thanks I want the same PFR6E plugs. the diference in price was huge but prefer the original plugs

 

[skinner]

BCP5ET is the same thread, reach etc. So it will "fit". The NGK temperatures mean that 5 is a hotter plug than 6 (PFR6E), so I wouldn't use it, although the temperature difference between 5 and 6 is small.
Also it isn't a platinum plug, so doesn't offer the same life. The standard plugs generally last fine for 72k (the service interval), I doubt a BCP5ET would last half of that.

People seem happy with their Bosch super 4's. No idea how long they last though.

Try http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm for an abbreviated list.

 

[dave1980]

thanks guys, i will give the bosch super 4's a try.

 

[dave1980]

ok next question, once you have got the top off how do u get to the plugs?.
i cant seem to find them, does that little black box need to come off too?.

 

[gregwilliams333]

mate dont use the bosh they crap i had them and had to change them for ngk ones they are much better,

 

[xxxic3xxx]

and make sure you use the correct plugs (NGK PFR6E-10, i think)

don't go putting anything else in there

very very true, just use either renault ones or high end replacements that are designed for that car, not any thing from halfrauds or motorworld ect ect,

 

[xxxic3xxx]

mate dont use the bosh they crap i had them and had to change them for ngk ones they are much better,

dont know how you can really tell, a lot of people say that the ngks are crap, sooo its just what you use and how you use them, i got bosch super 5 i think and there miles better thn the ngks in my opinion ngks fooked up :dead:

 

[Fred@BTM]

ngks are the best by far!

 

[Clioman51]

I have used bosch super 4's and never had a problem so far. Used them in my old car too not an issue so cant see what all the fuss is about surely there cant be that much difference between them?

 

[Fred@BTM]

there's a tech note from renault saying NGK's must be used in the F4R engine

 

[TeZ]

i wouldnt use Bosch in a 172. NGK for me.

 

[Dan@SJM]

Bosch super 4's are crap. they are only there to increase service intervals.