D2 Plug recommendations for LPG?

[Roverlord off road spares]

What D2 Plug recommendations for LPG? please.

[bee utey]

Bosch WR7KI33S platinum long life LPG plugs, gapped as out of the box at 0.7mm. You will have to order them, Bosch in Melbourne usually have them in stock and I have to order them through Burson Auto Parts. They work very well and don't wear out quickly like standard plugs. Make sure they are tightened correctly to ensure the gasket washer is flattened, or they will run hot.

[Roverlord off road spares]

Bosch WR7KI33S platinum long life LPG plugs, gapped as out of the box at 0.7mm. You will have to order them, Bosch in Melbourne usually have them in stock and I have to order them through Burson Auto Parts. They work very well and don't wear out quickly like standard plugs. Make sure they are tightened correctly to ensure the gasket washer is flattened, or they will run hot.

Thanks mate, I was totally bamboozled by stuff i read on net, one says this and one says that. just looking thorough part listings find them out of date, online confusing
NGK recommend one plug The dearest of course, PFR5G-11 1.1 petrol engine
but if you do a comparison to iridium they give BKR5EIX-11 which is a cheaper one.( but they don't list that as a suitable plug)
Then looking at Bosch online for LPG they list
Spark plug, Platinum Ir CNG/LPG gas
Bosch Order No.
0 242 240 652
Short No.
WR6KI33S
@$4.98 per plug is cheaper than the double platinum Champion plugs that I had in it. and even though I could buy them at a reasonable price, The Bosch plugs price is definatily better $ by far. I don't think some of these $18 -$20 plugs are good if you had a fouling problem for a short period and they carbon up, they never run the same.
so Hence I ask, and as you do LPG for a living your advise is appreciated

[bee utey]

Bosch catalogues are often wrong, for example the LPG catalogue that they have online lists different heat ranges for the 4.0 in the D2 and the P38 even though they are exactly the same engine. NGK heat range "5" translates in most cross reference charts as Bosch heat range "8" and most LPG guides recommend one heat range colder, i.e. "6" in NGK and "7" in Bosch, the numbers going in different directions.

As I live at the top of a looong ascent from Adelaide via the SE Freeway, my plug recommendations tend to get a workout every day. WR7KI33S seems to be an excellent all round performer in all the low/medium comp V8's and I would only recommend the WR6KI33S in extreme performance conditions.

[Roverlord off road spares]

Bosch catalogues are often wrong, for example the LPG catalogue that they have online lists different heat ranges for the 4.0 in the D2 and the P38 even though they are exactly the same engine. NGK heat range "5" translates in most cross reference charts as Bosch heat range "8" and most LPG guides recommend one heat range colder, i.e. "6" in NGK and "7" in Bosch, the numbers going in different directions.

As I live at the top of a looong ascent from Adelaide via the SE Freeway, my plug recommendations tend to get a workout every day. WR7KI33S seems to be an excellent all round performer in all the low/medium comp V8's and I would only recommend the WR6KI33S in extreme performance conditions.
I said your the man who knows, I'll go you Recommendations, Thank
Again,
Cheers, Mario

[Cannon]

Well I bought some of these plugs and set about putting them in today. How hard can it be? Thinks me.

All goes well until it comes time to start her up and go for a drive in my beautifully running V8 D2.

At low revs it ran very rough but got better at higher revs.

On the highway she purred along beautifully until it started back firing and ruining rough again. Next thing sweet as a nut.

Got home and made sure all the leads were attached correctly. Found a couple not quite right, so happy days methinks.

It was running better but still rough at low revs.

I then began swapping out the new plugs for old thinking I may have a dodgy one.

At about number 5 things started running and sounding great so I started putting the new ones back in 1 x 1 and testing as I went.

I got all but 2 new ones back in.

It still isn't running as well as I'd like but I'm now very good at swapping hot plugs.

Does this thing happen normally?

Could I have 2 faulty plugs?

Runs worse on LPG but still not great on petrol.

Does the car have to learn is got new plugs?

[bee utey]

I've fitted over 40 boxfulls of these things, haven't had to send any back yet. However, I've occasionally seen people break the insulators with poor fitting plug sockets which is why I only ever do up plugs with a wobble drive extension. Also if one or more plug connectors wasn't pushed on properly, the coil affected could be burnt out. It's a known problem I believe, advice has it to never run a Thor without all plugs fully connected.

As an example, I managed to kill the coil on an EL Falcon the other day, testing for a misfire. I withdrew the plug leads off the plugs one-by-one on a running engine, then it died 100%. New coil fixed it. You have 4 individual coils in the packs to burn out instead of just one.

Not saying this is exactly your case but how does it run with all the old plugs back in?

Also you can test the lead continuity by measuring resistance across the two ends of each coil, i.e cyls 1,8,4 & 3 connect to cyls 6,5,7 & 2 in that order.

As for the ECU it doesn't need to learn about new plugs, so long as they work the ECU should be happy.

[Cannon]

I'll put all the old ones back in today & see how it goes.

Thanks :)

[Cannon]

I shot home at lunch time & put all of the old plugs back in & a test drive shows everything back to normal.

Smooth all the way through the rev range.

I'm assuming that means my coils are still ok.

I guess i'll start putting the new ones in 1 x 1 again until it starts running rough so i can send the crook ones back.

Will having a mix of plugs have any bad reprcussions?

[Roverlord off road spares]

Check the plugs carefully as Bea utey says, "cracked insulator", Very easy to do on fitting. also I found new plug leads some a a pain to clip on.

[Roverlord off road spares]

Bosch catalogues are often wrong, for example the LPG catalogue that they have online lists different heat ranges for the 4.0 in the D2 and the P38 even though they are exactly the same engine. NGK heat range "5" translates in most cross reference charts as Bosch heat range "8" and most LPG guides recommend one heat range colder, i.e. "6" in NGK and "7" in Bosch, the numbers going in different directions.

As I live at the top of a looong ascent from Adelaide via the SE Freeway, my plug recommendations tend to get a workout every day. WR7KI33S seems to be an excellent all round performer in all the low/medium comp V8's and I would only recommend the WR6KI33S in extreme performance conditions.

Well I tried to order the WR7KI33S tonight, but Bosch only had 2 left in stock, bit useless for a 8 cyl vehicle. The WR7KI33S are double platinum.

I did manage to order the WR6KI33S which is a plat/ir plug, and was recommended for CNG/LPG in their cat. The price is cheap enough so if they don't last long then so be it.
But as you say their cat is often wrong.

[Cannon]

I hope they've still got one because I've just sent the faulty one back.

I just ended up using the most accessible plug & swapping the new ones in until the crook one revealed itself.

[TheTree]

Time for me to replace my plugs soon and these WR7KI33S ones look to be the business

Seems like everyone is happy with them

Steve

[Pedro_The_Swift]

cheapest I can find them online is $9.16ea,,

[bee utey]

I've been a bit browned off with the difficulty in getting quality Bosch plugs as they seemed to have sent production off to Russia of all places. Not sure how stocks of the LPG plugs are going as I've not sold too many this last year. I've decided to try some BRISK Silver plugs instead, so far so good for the handful of vehicles I've fitted them too including one P38. The two part numbers I've got for the low comp V8 are LR15YS, or DR15YS if you prefer the 16mm hex. The local supplier is just one guy, Robert Morton. Contact via here:

Brisk Spark Plugs Australia (http://www.brisksparkplugs.com.au/contact/sales.shtml)

[Roverlord off road spares]

I've been a bit browned off with the difficulty in getting quality Bosch plugs as they seemed to have sent production off to Russia of all places. Not sure how stocks of the LPG plugs are going as I've not sold too many this last year. I've decided to try some BRISK Silver plugs instead, so far so good for the handful of vehicles I've fitted them too including one P38. The two part numbers I've got for the low comp V8 are LR15YS, or DR15YS if you prefer the 16mm hex. The local supplier is just one guy, Robert Morton. Contact via here:

Brisk Spark Plugs Australia (http://www.brisksparkplugs.com.au/contact/sales.shtml)
I stopped selling Bosch plugs due to the constant stock supply problems, in fact a lot of Bosch stuff was always in low stock levels.
Cheers, Mario

[TheTree]

I've decided to try some BRISK Silver plugs instead, so far so good for the handful of vehicles I've fitted them too including one P38. The two part numbers I've got for the low comp V8 are LR15YS, or DR15YS if you prefer the 16mm hex. The local supplier is just one guy, Robert Morton. Contact via here:

Brisk Spark Plugs Australia (http://www.brisksparkplugs.com.au/contact/sales.shtml)

Mate

I notice the LR15YS has a 0.9mm gap and the DR15YS has a 0.7mm gap

Do you gap them after you receive them?

Steve

[bee utey]

Mate

I notice the LR15YS has a 0.9mm gap and the DR15YS has a 0.7mm gap

Do you gap them after you receive them?

Steve
The plugs with a 0.9mm gap have a suffix -9 after them. Of course I always check the gaps and adjust accordingly. 0.7mm seems to be best.

Brisk (http://www.brisk.biz/catalogues/spark-plugs/lpg_cng/silver)

[Pedro_The_Swift]

Yep,, its a spark plug,,