Volvo - LPG spark plugs

classicswede · Jul 29th, 2011, 21:34

PV - 120 - 1800 - 140 - 164 all models

B18 B20 B30 ALL - NGK BP6HS or BP7HS

240 360 740 940

B19 B21 B23 B200 B230 ALL - NGK BPR6ES

340

B14 B14.1 B14.2 B14.3 upto 83- NGK BP6HS

B14.3 B14.4 83 on - NGK BPR6ES

B172K - NGK BPR6ES

760

B27 B28 B280 all BPR6EF

960

BGK BKR6ES

850

ALL BKR6ES

classicswede · Jul 29th, 2011, 21:35

I will update this a little further later on.

If I do have anything wrong please let me know

Gareth83 · Nov 17th, 2011, 10:01

what about a 99 plate c70 t5 on lpg? bkr7e ?

classicswede · Nov 17th, 2011, 11:41

The original plug is a 6 but running on LPG there would be no harm in going to a 7 or even 8.

hancym · Nov 28th, 2011, 01:18

What would you recommend for a T6 in an XC90

classicswede · Nov 28th, 2011, 18:18

are the plugs 19mm thread length or 26mm?

hancym · Nov 29th, 2011, 18:33

Ahh! Now you've got me as I haven't had the car long enough to pull the plugs yet. Was thinking of doing it in a month or so. Could you please recommend both so I'll know what I'm after when I lift them?

tom-madbiker · Dec 3rd, 2011, 20:50

i am currently running my amazon on BP5HS ngk plugs on lpg i decieded to try a hotter plug just to see the difference

hancym · Dec 3rd, 2011, 21:31

I'm curious, why would you run a hotter plug when LPG burns hotter?

classicswede · Dec 4th, 2011, 19:31

Hotter and Colder are not the best way of describing a plugs properties and often becomes confusing.

With LPG we are looking for a plug that will disapate heat faster than the plug normaly used with petrol. If a plug is to be run only on LPG then the plug could have an extreamly fast heat disapation without causing any problems. However a engine that runs only on LPG is very rare.

What we need is a plug that remains just hot enough to burn off any soot when running on petrol but no more.

NGK numbers and Bosch numbers go in oposite directions for how fast the plug disapates heat. NGK the higher the nuber the quicker heat is disapated. With a B20 in Toms case a 5 is perfect for 4 star, just about ok for unleaded when driven gentle but struggling with LPG. A 6 would be a much better choice but for a tweaked engine especialy on LPG a 7 or 8 would be a far better choice.

In the case of NGK with LPG you want either the same as petrol of 1 nuber higher or bosch upto 1 number lower. No need to go any further than that.

Jul 29th, 2011, 21:34	#1
classicswede Trader Volvo in my veins Last Online: Yesterday 23:53 Join Date: Dec 2004 Location: Anglesey	Volvo - LPG spark plugs PV - 120 - 1800 - 140 - 164 all models B18 B20 B30 ALL - NGK BP6HS or BP7HS 240 360 740 940 B19 B21 B23 B200 B230 ALL - NGK BPR6ES 340 B14 B14.1 B14.2 B14.3 upto 83- NGK BP6HS B14.3 B14.4 83 on - NGK BPR6ES B172K - NGK BPR6ES 760 B27 B28 B280 all BPR6EF 960 BGK BKR6ES 850 ALL BKR6ES __________________ http://www.classicswede.org www.classicswede.co.uk

Jul 29th, 2011, 21:35	#2
classicswede Trader Volvo in my veins Last Online: Yesterday 23:53 Join Date: Dec 2004 Location: Anglesey	I will update this a little further later on. If I do have anything wrong please let me know __________________ http://www.classicswede.org www.classicswede.co.uk

Nov 17th, 2011, 11:41	#4
classicswede Trader Volvo in my veins Last Online: Yesterday 23:53 Join Date: Dec 2004 Location: Anglesey	The original plug is a 6 but running on LPG there would be no harm in going to a 7 or even 8. __________________ http://www.classicswede.org www.classicswede.co.uk

Nov 28th, 2011, 18:18	#6
classicswede Trader Volvo in my veins Last Online: Yesterday 23:53 Join Date: Dec 2004 Location: Anglesey	are the plugs 19mm thread length or 26mm? __________________ http://www.classicswede.org www.classicswede.co.uk

Dec 4th, 2011, 19:31	#10
classicswede Trader Volvo in my veins Last Online: Yesterday 23:53 Join Date: Dec 2004 Location: Anglesey	Hotter and Colder are not the best way of describing a plugs properties and often becomes confusing. With LPG we are looking for a plug that will disapate heat faster than the plug normaly used with petrol. If a plug is to be run only on LPG then the plug could have an extreamly fast heat disapation without causing any problems. However a engine that runs only on LPG is very rare. What we need is a plug that remains just hot enough to burn off any soot when running on petrol but no more. NGK numbers and Bosch numbers go in oposite directions for how fast the plug disapates heat. NGK the higher the nuber the quicker heat is disapated. With a B20 in Toms case a 5 is perfect for 4 star, just about ok for unleaded when driven gentle but struggling with LPG. A 6 would be a much better choice but for a tweaked engine especialy on LPG a 7 or 8 would be a far better choice. In the case of NGK with LPG you want either the same as petrol of 1 nuber higher or bosch upto 1 number lower. No need to go any further than that. __________________ http://www.classicswede.org www.classicswede.co.uk

Nov 17th, 2011, 10:01	#3
Gareth83 Senior Member Last Online: Jan 11th, 2013 22:01 Join Date: Dec 2008 Location: Cardiff	what about a 99 plate c70 t5 on lpg? bkr7e ?

Nov 28th, 2011, 01:18	#5
hancym Master Member Last Online: Feb 25th, 2024 15:40 Join Date: Jan 2011 Location: Norwich	What would you recommend for a T6 in an XC90

Nov 29th, 2011, 18:33	#7
hancym Master Member Last Online: Feb 25th, 2024 15:40 Join Date: Jan 2011 Location: Norwich	Ahh! Now you've got me as I haven't had the car long enough to pull the plugs yet. Was thinking of doing it in a month or so. Could you please recommend both so I'll know what I'm after when I lift them?

Dec 3rd, 2011, 20:50	#8
tom-madbiker Master Member Last Online: Apr 14th, 2020 21:20 Join Date: May 2010 Location: chesham	i am currently running my amazon on BP5HS ngk plugs on lpg i decieded to try a hotter plug just to see the difference

Dec 3rd, 2011, 21:31	#9
hancym Master Member Last Online: Feb 25th, 2024 15:40 Join Date: Jan 2011 Location: Norwich	I'm curious, why would you run a hotter plug when LPG burns hotter?

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