Spark plug type and heat - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ft86-UAE · 06-09-2012, 05:31 PM

hi,

any of you guys check'd what type and heat range is the stock spark plug on the ft-86?

are they Denso or NGK?

and what heat rage are they 6 or 7.

Thanks,

arghx7 · 06-09-2012, 06:54 PM

short answer: The FA20 appears to have a 9 heat range, while the Lexus IS350 2GR-FSE engine appears to have a 6. A 9 is significantly colder than what you would find on an STi or a Supra from the factory.

more detailed answer: It's a Denso ZXE27HBR8 plug. That's a Denso 27 heat range... Denso uses different number range than the more commonly understood NGK system. Here's a conversion chart I found on sparkplugs.com:

The chart indicates the stock plug for the FA20 would be a 9 heat range on the NGK scale. When I first read that, I'll admit I'm skeptical. Now I haven't looked extensively at heat ranges for direct injected n/a engines. But I can't think of a mass produced passenger car engine using anything that cold when stock except with a rotary engine, and only then in the trailing position. I was thinking more along the lines of a 5 or 6 on the NGK scale as well. The coldest you'll see from the factory on even boosted engines is usually about a 7. You'd think it would foul out with a 9.

But here's something to consider. Do some Googling and you'll find that the 2GR-FSE engine in the Lexus IS350 (using an earlier version of the D-4S direct injection system) has a Denso FKB20H plug. If you cross-reference that with an NGK plug at RockAuto, it lists NGK spark DFH6B11A (6 heat range on the NGK scale). So that's two sources (including chart above) saying that an NGK 6 corresponds to a Denso 20.

So maybe the FA20 spark plug heat range is close to an NGK #9 after all.

GL4787 · 06-10-2012, 04:23 AM

Has anyone seen what it takes to change spark plugs in one of these cars? If not Google it. Pretty ridiculous.

arghx7 · 06-10-2012, 11:02 AM

This isn't the only vehicle that requires you to remove the engine mounts to change spark plugs. Rear plugs on V8 vehicles can require that. With factory irridium plugs, even with boltons it shouldn't require new plugs for years.

ft86-UAE · 06-10-2012, 11:21 AM

Thanks a lot arghx7

06-09-2012, 05:31 PM	#1
ft86-UAE turbo FT-86 Join Date: Jun 2012 Drives: ft-86 Location: Dubai Posts: 90 Thanks: 76 Thanked 13 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Spark plug type and heat hi, any of you guys check'd what type and heat range is the stock spark plug on the ft-86? are they Denso or NGK? and what heat rage are they 6 or 7. Thanks,

06-09-2012, 06:54 PM	#2
arghx7 Senior Member Join Date: Nov 2011 Drives: car Location: cold Posts: 599 Thanks: 72 Thanked 607 Times in 185 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	short answer: The FA20 appears to have a 9 heat range, while the Lexus IS350 2GR-FSE engine appears to have a 6. A 9 is significantly colder than what you would find on an STi or a Supra from the factory. more detailed answer: It's a Denso ZXE27HBR8 plug. That's a Denso 27 heat range... Denso uses different number range than the more commonly understood NGK system. Here's a conversion chart I found on sparkplugs.com: The chart indicates the stock plug for the FA20 would be a 9 heat range on the NGK scale. When I first read that, I'll admit I'm skeptical. Now I haven't looked extensively at heat ranges for direct injected n/a engines. But I can't think of a mass produced passenger car engine using anything that cold when stock except with a rotary engine, and only then in the trailing position. I was thinking more along the lines of a 5 or 6 on the NGK scale as well. The coldest you'll see from the factory on even boosted engines is usually about a 7. You'd think it would foul out with a 9. But here's something to consider. Do some Googling and you'll find that the 2GR-FSE engine in the Lexus IS350 (using an earlier version of the D-4S direct injection system) has a Denso FKB20H plug. If you cross-reference that with an NGK plug at RockAuto, it lists NGK spark DFH6B11A (6 heat range on the NGK scale). So that's two sources (including chart above) saying that an NGK 6 corresponds to a Denso 20. So maybe the FA20 spark plug heat range is close to an NGK #9 after all. Attached Images

06-10-2012, 04:23 AM	#3
GL4787 Toyota Service Writer Join Date: Jun 2012 Drives: Whiteout M/T, 2003 Duramax Location: United States Posts: 15 Thanks: 0 Thanked 9 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Has anyone seen what it takes to change spark plugs in one of these cars? If not Google it. Pretty ridiculous. __________________ Whiteout Manual I'm a service writer at a Toyota/Scion dealership, if I can help at all let me know.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Subaru or Toyota drain plug?	yayforaddison	Mechanical Maintenance (Oil, Fluids, Break-In, Servicing)	22	05-06-2020 11:59 PM
spark plugs	subaruferrucci	Engine, Exhaust, Transmission	22	04-10-2013 12:24 PM
LEDs that convert heat directly into light...	serialk11r	Off-Topic Lounge [WARNING: NO POLITICS]	12	03-10-2012 01:08 PM
Car won't start, no spark?	#87	Other Vehicles & General Automotive Discussions	5	12-19-2011 01:29 PM
Jowett Jupiter/spark plugs	aspera	Engine, Exhaust, Transmission	6	02-25-2010 06:47 PM

06-10-2012, 11:02 AM	#4
arghx7 Senior Member Join Date: Nov 2011 Drives: car Location: cold Posts: 599 Thanks: 72 Thanked 607 Times in 185 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	This isn't the only vehicle that requires you to remove the engine mounts to change spark plugs. Rear plugs on V8 vehicles can require that. With factory irridium plugs, even with boltons it shouldn't require new plugs for years.

06-10-2012, 11:21 AM	#5
ft86-UAE turbo FT-86 Join Date: Jun 2012 Drives: ft-86 Location: Dubai Posts: 90 Thanks: 76 Thanked 13 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks a lot arghx7

User Name		Remember Me?
Password