I ask the question because the owner's handbook, RAVE, and Duckworth Parts show different part nos.

My owner's handbook shows: NGK BKR-6EQUP

RAVE: NGK BKR-6EK (non-NAS)

Duckworth: NGK R5 (3rd post here: https://www.fullfatrr.com/forum/topic35544.html)

NGK's website lists the EQUP for this engine.

Mine currently has Champion RC89TMC which has 3 earth electrodes vs. the EQUP's 4

The ceramic insulator (and tip) on the EK is much longer than the Champion. Wouldn't the longer ceramic section indicate a hotter plug.

Also note the design difference between the EK and EQUP (below):

Click image to enlarge

Sad. 43 views and no replies to my question. Ron B. VK2OTC
2003 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA

Sorry mine is LPG so different to what you require matey. May The FFoRRce Be With You

Thanks Jim - I had read elsewhere that LPG uses the same plugs in the L322. Ron B. VK2OTC
2003 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA

There is a recent thread in the LPG section about this have a quick look, I fitted the Brisk to my 4.4 LPG and no problems so far!

Good luck!!!  May The FFoRRce Be With You

Thanks Jim. I just had a look at that thread. I've never heard of the Brisk brand. Dunno if they are available in Oz.

Edit: yes, they are. Ron B. VK2OTC
2003 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA

I decided to buy the BKR6EQUP.

Now to change them. The two plugs I've recently removed have been so tight I was worried about the threads galling and damaging the heads. The plug threads are brown with baked on oil. I may try loosening them and then spraying in a quantity of WD40 in the hope it will seep down the threads and loosen/lubricate them. Any thoughts on that?

I am undecided on whether or not to run a thread chaser through the holes to clear them of tarry baked on oil and also whether to apply anti seize.

Previous alloy-headed engines of mine haven't used long life spark plugs so they didn't stay in for years and I generally had no problem removing them.

Also, does one remove the plugs from a hot or cold engine? Holes expand when hot, and aluminium expands more than steel so one would expect the plugs should be easier to remove when hot. On previous cars I've done them cold but the weren't tight like these. Ron B. VK2OTC
2003 L322 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA