Hi all,

Going to be changing my spark plugs soon and wondered which I should buy and the best place to get them.

Car is a JDM WRX 95 Wagon with light mods.

Also, what is the gap setting for an Impreza import? Is it 0.8mm?

Cheers

Simon

 

Hey Simog, I bought a set of Densos' for my yoke when I bought her. Location of spark plugs being a mini-nightmare to get to seemingly meant previous owners never attempted to change them! Hehe

When I fitted them, the car was spitting and backfiring like f**k for a few minutes, then she all settled down and now runs the very, very best.
-that was the benefit of 8 year old sparks being replaced by nice fresh un's

Gappage, 0.8mm seems familiar, but one of the more experience lads here could keep ya right.

 

Plug = NGK PFR7B
Gap = 0.6 - 0.7mm

 

Thanks mate, I am thinking that mine is well over due a change too, similar to yours, they took one look and abandoned the idea! Don't think it is too hard a job as long as you get the access to them although I am sure they will be a pig to get to and I will probably wind up taking a few bits out first!! Glad I don't have an airbox to remove anymore!!

You don't per chance have the product / model no of those denso's do you? Rough idea on price?

 

Whoops! This is what I mean! someone always knows better! :P

 

Thanks mate

Is the gap different between JDM and UK spec imprezas?

 

I remember there were 2 options for me for the Denso's.

Regular recommended and performance.

I didn't see the benefit in the performance considering they were near 3 times the price per plug, so I opted for standard.

I can get the model number for ya when I'm back in work in about an hour and post it later when I get back home.

Cost...if I remember....was around the £20 for the 4 of them? I can tell ya figures better tonight.

Fitting was handy on the airbox side, but a long reach sparkplug spanner is a must! Battery side was a P-I-G and a half, especially closest to the bulkhead, but, get a coffee in ya, and give yerself an hour. You can do it.

I'll be happy to give a few pointers as you go along if yer having diffs!

 

Changing the plugs is fairly simple for anyone with a few brain cells! They are in the same position on a beetle enigne FFS!
Tips for changing spark plugs:
1) Remove air filter on driver's side and washer bottle from passenger side.
2) Make sure you have a good selection on socket extensions/knuckle joints etc.
3) Tape the spark plug socket to the extension bar. If you don't, the socket gets stuck on the plug when you go to pull your racket up and is a bitch to get out again.
4) Don't over-tighten the plugs.
5) Mind your knuckles and have a nice cup of tea.

 

Nope.

 

Thanks guys,

Job for tomorrow then! Hope this breathes a bit more life back into the car!!!

Don't know where I would be without this forum! Probably paying inflated prices at local garages for jobs I can easily do myself!!

 

Allow a good two hours and take your time. I can change all 4 now in around 30-40 mins. Took a few goes though!

 

I'll take your 2 hours and double it!!

Not the most mechanically minded individual, but I have done all my own work on the car and, although it takes me a while, I usually figure it out!!

Thanks for all the pointers!

 

PFR7B are only needed if you are running high boost, i would stick with PFR6B if you are'nt. Sixes are recommended for a stock engine, i've also found they run a bit sweeter on sixes when the engine is cold.

 

PM sent bud.

 

all u need are pfr6b i run my sti on these and no problems.

 

ngk pfr6b 0.6-0.7
be careful with the coil packs very easily damaged espically if they have been in the car from new.
changing is easy-ish takes about 20/30mins when you have done it before.
new coil packs cost around £200.

 

Always ran 7B's on all 3 classic imprezas, including 2 sti's, with no problem.
Just adds that little bit of extra protection. Plus, if you do up the boost, you haven't then got to change the plugs again.