plugs & gaps

[jonboy21t]

Hi there....looking to fit new plugs to my 2001 V70 T5 as i can find no recent history of them being changed...

Can someone recommend a make & suggest a suitable gap to set the sparkplugs at.....

Thanks in advance...

Jon

[jamesy12345]

I think many guys on here would recommend genuine Volvo plugs, although I've used NGK coppers in most of my cars & they have been fine.

Good site below:

http://www.ngkpartfinder.co.uk/car_c...529&engine=2.3

(although 'gap is preset' is not very helpful)

...and heat range comparison here.

On my cars if I up the boost/power I usually go a grade or two colder and close the gap up a little.

//edit

looking on the net, the gap should be 0.7-0.8 mm standard...can anyone confirm...

[Wobbly Dave]

0.7mm sounds right - NGK BKR7EVX will do nicely.

[Gold 'N' Brown]

I've got a set of Volvo plugs (sealed in original packet) surplus to requirements. Was going to put a for sale post up later. PM me if interested. After £35 posted.

[jonboy21t]

Thanks guys, as the car is standard (for now) i'll be sending a PM to Mr Golden Brown.....

[merc85]

All plugs for the t5's come pre set, You cannot set the gap you will damage the electrode if you try.

[jamesy12345]

All plugs for the t5's come pre set, You cannot set the gap you will damage the electrode if you try.

Is that the volvo plugs...I've never bought them...there's a lot of talk on the net (and I admit it is talk) about reducing the gap as the boost goes up. So, rightly or wrongly, I always drop reduce the gap on the NGK coppers I get if the car is modified.

http://www.ngksparkplugs.com/docs/te...plications.pdf

Required voltage to form a spark at the gap is directly proportional to pressure. A smaller gap
may be required to avoid misfire or flashover.

http://www.boschsparkplugs.net/learn...i-gap-my-plugs

However, after raising compression and installing a turbo, a smaller Gap is required to ensure ignitability in the denser air/fuel mixture.

[Jamest5r]

I had to have my gap dropped to 22 thou to stop blow out, as soon as boost came on it missed like hell

[merc85]

All Volvo t5 plugs are fine tipped and shouldnt be re-gapped, if you need the next gap down choose the correct plug.

[Jamest5r]

Should of said mine were ngk BKR8EVX.

[jamesy12345]

Should of said mine were ngk BKR8EVX.

can't mix platinum & nitrous!!

[jonboy21t]

All Volvo t5 plugs are fine tipped and shouldnt be re-gapped, if you need the next gap down choose the correct plug.

Thanks to Steve for sending the Volvo plugs & for the advise regarding the gaps etc....i will be fitting without going near my feeler guage......

Thanks again..

Jon

[MoleT-5R]

can't mix platinum & nitrous!!

got it stuck in my head that copper electrode would be better on ours turbo volvo's, not sure where I got that or if it's right even !!

[jamesy12345]

got it stuck in my head that copper electrode would be better on ours turbo volvo's, not sure where I got that or if it's right even !!

Me too) maybe comes from the American chaps..http://v70r.com/forums/topic/35071-2...2-spark-plugs/

Just need to reduce the gap & keep an eye on them...& change the coil maybe....I am talking P80 cars though...

[MoleT-5R]

Me too) maybe comes from the American chaps..http://v70r.com/forums/topic/35071-2...2-spark-plugs/

Just need to reduce the gap & keep an eye on them...& change the coil maybe....I am talking P80 cars though...

not heard nothing about coils, is there a reason to change them

[jamesy12345]

not heard nothing about coils, is there a reason to change them

just another personal thing maybe - maybe misguided (like the copper plugs!?) but I've convinced myself that the coils can become less effective over the years...they do a hard job as part of the HT side so for me it's part of a stage zero, easy job too

[MoleT-5R]

just another personal thing maybe - maybe misguided (like the copper plugs!?) but I've convinced myself that the coils can become less effective over the years...they do a hard job as part of the HT side so for me it's part of a stage zero, easy job too

Oh yes I can agree that over the years they will tail off in performance, I thought you were meaning that a different type of coil pack would be better suited to copper cored plugs.

[jamesy12345]

Oh yes I can agree that over the years they will tail off in performance, I thought you were meaning that a different type of coil pack would be better suited to copper cored plugs.

No just trying to say to the world: make sure ALL of the HT side is in good nick before telling me I MUST buy 50 quid spark plugs ....I'm of the opinion that copper plugs get a bad press due to incorrect gapping and other components being past their best, rather than coppers being unsuitable.

[MoleT-5R]

No just trying to say to the world: make sure ALL of the HT side is in good nick before telling me I MUST buy 50 quid spark plugs ....I'm of the opinion that copper plugs get a bad press due to incorrect gapping and other components being past their best, rather than coppers being unsuitable.

I'm quite happy to run non-volvo plugs, but I do then change them more frequently then, the previous owner to me had major ignition troubles on my olive t-5r and spent a fortune between his local garage in wiltshire and a north london volvo dealership trying to sort the issues and me I've not ever had really ignition troubles until this last years of the 8 that I've owned the car and that I'm sure is really a boost issue, that hopefully will be sorted this week, so I'm ready to go and play with Claymore at the weekend...

[Bones]

I'm definateley going for Volvo plugs when I next service mine.

Can't remember what I'm running just now but they seem to be doing their job.

I'm running IPD HD coil packs aswell