Spark Plugs - 850

**Mck1** · Friday 19th March 2010, 16:34

Just change my spark plugs

How easy is it on an 850, only took me 12 minutes including opening & closing the bonnet. Now starts & drives much better, hoping for better MPG.

Only cost £16.13 on Ebay for 5 x NGK R (4 prong) SPARK PLUGS

All you need is a 5/8" Flexible Spark Plug Wrench & a T30 Torx head (star type shape)

Pics below:

Attachment 8416
Attachment 8417
Attachment 8418
Attachment 8415

No excuse not to change them now!

**Clan998** · Friday 19th March 2010, 17:55

Originally Posted by Mck1

Just change my spark plugs

How easy is it on an 850, only took me 12 minutes including opening & closing the bonnet. Now starts & drives much better, hoping for better MPG.

Only cost £16.13 on Ebay for 5 x NGK R (4 prong) SPARK PLUGS

All you need is a 5/8" Flexible Spark Plug Wrench & a T30 Torx head (star type shape)

Pics below:

Attachment 8416
Attachment 8417
Attachment 8418
Attachment 8415

No excuse not to change them now!

Hiya

Maybe its been a long week ... But wheres the brake master cylinder and reservoir ?

Am I missing something real obvious ?

Its a t5 right ?

Rich

**Mck1** · Friday 19th March 2010, 18:11

I took the images off another euro Volvo site, so poss not euro/right hand drive engine. But the spark plug bit is just the same.

**Crazy_C** · Friday 19th March 2010, 18:48

Hmmm, be interesting to see what your performance figures are now with the 4-electrode plugs. I have done experiments with various cars with single electrode and multitip plugs, and most of the time I've seen losses in naturally aspirated cars but never tried a turbo car before.

Good price for the plugs though

**Mck1** · Friday 19th March 2010, 19:32

Apparently the N/A 2.0 20v engine works better with the three/four electrode type as it helps to prevent hesitant starting which can be a problem.

**endo-t5** · Sunday 21st March 2010, 21:39

you can buy volvo plugs on ebay for less than what you paid for the ngk's and the turbo set up takes longer to change as top boost pipe is in the way but well done on time. at least you used ngk's not champion's.lol

**Wobbly Dave** · Sunday 21st March 2010, 22:14

only 1 plug NGK recommend for 850 T5 - BKR7EVX

possibly also the iridium 8s if you are feeling flush. Don't fall for this 4 electrode ££££££.

**Mck1** · Monday 22nd March 2010, 18:57

Do you think that the four prong NGK R's will make my already slow 2.0 20v slower?

**bonelorry** · Monday 22nd March 2010, 19:06

Originally Posted by Wobbly Dave

only 1 plug NGK recommend for 850 T5 - BKR7EVX

possibly also the iridium 8s if you are feeling flush. Don't fall for this 4 electrode ££££££.

Hit-Nail-Head!

**Wobbly Dave** · Monday 22nd March 2010, 19:12

Originally Posted by Mck1

Do you think that the four prong NGK R's will make my already slow 2.0 20v slower?

TBH I don't think there will be much in between standard Volvo plugs and NGK's - you are not struggling with high intake temps or real stress found in the modified T5 engine.