Spark plugs for LPG

[Angelom]

Hello all,
I did a lot of searches about this (before to become a member) but haven't found anything specific, my apologies if I missed something.
I have a 3.5L AWD Touring, LPG equipped, and in the next weeks I'll have to change spark plugs so I wonder which spark plugs would be the best ones for my engine.
I heard about NGK ZFR5LP-13G, with a strong suggestion from NGK itself in order to re-gap them to 1.1mm when used with LPG, and someone told me about Brisk Silver LGS DOR17LGS: anyone can confirm and/or give me other suggestions?
Many thanks in advance!!!
Best regards

Angelo

[badgx]

Hello Angelo,
NGK seems to be the most popular. Do keep it posted & let us know which ones you went with?

[DATMAN]

Originally Posted by Angelom

Hello all,
I did a lot of searches about this (before to become a member) but haven't found anything specific, my apologies if I missed something.
I have a 3.5L AWD Touring, LPG equipped, and in the next weeks I'll have to change spark plugs so I wonder which spark plugs would be the best ones for my engine.
I heard about NGK ZFR5LP-13G, with a strong suggestion from NGK itself in order to re-gap them to 1.1mm when used with LPG, and someone told me about Brisk Silver LGS DOR17LGS: anyone can confirm and/or give me other suggestions?
Many thanks in advance!!!
Best regards

Angelo

Hi

These are the same plugs I have in mine spaced at 1.1mm.

Next time I will be swapping for Denso VK16.

Changing the spark plugs on a 3.5 is not easy as entire upper manifold has to be removed. You should ensure that you have a spare blue rubber seal that fits the upper EGR tube that goes into the upper manifold as otherwise you will have a leak!

all the best

[devilmaycare]

Originally Posted by DATMAN

Changing the spark plugs on a 3.5 is not easy as entire upper manifold has to be removed. You should ensure that you have a spare blue rubber seal that fits the upper EGR tube that goes into the upper manifold as otherwise you will have a leak!

A reason to be thankful for the CRD! Are there any other tricky routine service operations for the 3.5?

[UK CHRYSLER 300C]

Originally Posted by devilmaycare

A reason to be thankful for the CRD! Are there any other tricky routine service operations for the 3.5?

You are kidding? Right?.... A reason to be thankfull for the CRuD? surely you meant the Hemi...i.e. no engine issues.
There are no tricky issues with any of the C petrol engines that I can recall and I've done a few,there's a few issues with the diesels but it seems to become 2nd nature to us when we lift the bonnet up on one( leak here,leak there,except Dannyfiveforty's and the other ones we've stopped leaking...lol)
Granted the petrol V6 is a completely different engine to the V8 but I can't remember any difficulty in servicing them.
By the way,Dannyfiveforty's wasn't leaking oil from the day it was made...I was sort of impressed....sort of I said.....must be a first I reckon......lol

[Angelom]

Thank you for your reply!

@Badgx yes I hear about NGK the most of times so they'd be good, I will let you know which ones I'll choose!

@Datman good to know that, is there any specific reason you choose to change them with VK16? Performance, durability, or what? Never heard about then, by the way, I'll check their site. About changing the plugs I'll let them do it when I'll take the car at the garage for the maintenance, I'm not good with engines!

@Devilmaycare why do you say so?

[DATMAN]

Originally Posted by devilmaycare

A reason to be thankful for the CRD! Are there any other tricky routine service operations for the 3.5?

LOL- would never swap my petrol for a diesel. UKCHRYSLER300C is bang on !!

Mine is more economical and better all round !...and no dpf!!

Bullet proof engine. So what if the upper manifold needs to be taken off every 100k to change spark plugs?

[DATMAN]

[QUOTE=Angelom;1134625]Thank you for your reply!

@Datman good to know that, is there any specific reason you choose to change them with VK16? Performance, durability, or what? Never heard about then, by the way, I'll check their site. About changing the plugs I'll let them do it when I'll take the car at the garage for the maintenance, I'm not good with engines!

Denso are just good quality all round! The VK are extra coated (compared to IK) so last longer.

Make sure that you garage holds a spare blue seal before they start job. Do not use the old seal. Costs £7 from Chrysler!

[devilmaycare]

Originally Posted by DATMAN

So what if the upper manifold needs to be taken off every 100k to change spark plugs?

I must admit that its many years since I did anything with a spark-ignition engine, apart from garden equipment, but I never needed to remove a manifold to get at the plugs. Presumably the plugs don't even need to be inspected, gapped or damaged ones replaced within that interval? Plug technology must have progressed a lot over the years.

[badgx]

As a general rule of thumb, standard spark plugs are good for 30K, platinum or iridium change around 60K.

Not sure what the recommendation is when a car has been fitted with lpg?