Classic cars forum & vehicle restoration.

[Rick]

Has anyone got either reference book to hand?

The Dodge originally had Autolite A7A plugs in it, but they seem thin on the ground. Lodge was one of the sponsor logos on the side, so if I can't find a suitable Autolite plug (Autolite #303 or #306 has been suggested elsewhere), then an equivalent Lodge plug would be appropriate, if I knew what I was looking for!

thanks, R
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[47p2]

My P2 was originally meant to run on Lodge plugs. I eventually managed to track down a set, but before fitting them I spoke with one of the P2 experts and was told it would not be a good idea

I would be careful if fitting Autolite or Lodge plugs to your car. Modern fuels burn at a much hotter temperature than they did when your vehicle was manufactured. Older type plugs cannot cope with the heat generated and the plugs will foul up and cause the car to run rough, maybe even cause a breakdown.
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ROVER
One of Britain's Fine Cars

[Rick]

Thanks for that p2, good points - I've sent the question off to a friend who has restored a number of Dodge trucks, see what he fits in his!

cheers, R
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[Phil - Nottingham]

The NGK website has a comprehensive equivalence chart but no Lodges on.

On our Rover P4 100 although the correct type Lodges fouled up on unleaded so always use NGK's or Bosch after equally unreliable experiences with Champions on this car and P5/P5B's
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Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2

[peter scott]

Hi Rick,

I've emailed some Champion cross reference and heat tables to you but I'm not sure they are very helpful for your Dodge.

Peter
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1939 SS Jaguar 2 1/2 litre saloon

[Rick]

Thanks for them Peter, handy things to have 'on file'

cheers,R
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[Jim Walker]

This thread puzzles me. Why do I not have sparking plug troubles? I run my unmodified cars and motorbikes on unleaded and have done for years, using the recommended plugs. I don't care whether they are Champions or Bosch or whatever as long as they are the correct reach and heat range.

Could it be that I USE my vehicles? That I don't start them up every few days to make sure they still run? Or that, having started them, I don't turn them off until they are thoroughly warm? Nor do I leave them idling for long periods.

Oh, and before anyone asks, I have yet to find any problems running on un-leaded, and if I ever do I must have saved enough money to have valve seat inserts fitted many times over.

Jim.

[Phil - Nottingham]

I agree - its nothing to with unleaded fuel and probably its with how the car is used - I have always found Champion plugs less reliable even when petrol was dripping with lead
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Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2

[TonyBrooks]

Have a look here

http://www.gsparkplug.com/

[Keith D]

Absolutely agree with Jim Walker. Only start the cars when I'm going to use them and never start them up "just for fun", or to let a fellow Club Member "hear" how good my engines run!

I've never had the remotest trouble with unleaded fuel. Leaded fuel in West Oz was discontinued about 2001 which was supposed to herald the end of the known world. We had "experts" creeping out of the woodwork, all telling us that we should do this or do that etc. It's all became too hard. Just drive the dammed cars! I've never had any valve problems associated with lead free fuel yet. I'll worry about problems when they happen!

Our unleaded is 91 octane (lower than yours) and the only old car I have that doesn't like it is the A40 with a 1622 BMC series B motor. I run that on 96 octane.

As far as plugs go, I very rarely touch them. We drive long journeys on fast empty roads and only do about 2000 miles a year so they are troublefree for years.
Keith D

[Rick]