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Plugs compatible?
Old Hutcho - August 27th, 2011 at 05:13 PM

I just changed the iridium plugs in my Falcon AU11 six cylinder Ford this afternoon, chasing an issue in that engine. I put a new set of NGK IGR5C plugs in the engine, and it didint fix the problem.

So now Ive got a set of iridium plugs sitting on the bench which cost me an arm and a leg and they physically fit my 1916 VW aircooled engine with the bigger heads.

Question now is, will they suit my 1916. They physically will screw into the hole. The reach is the same.

From the NGK site it looks as though they have the same heat range (5) as the plugs Ive got in the engine now (NGK B5HS).

Conversely, does anybody want a brand new set of iridium plugs for $100 incl postage to your place.

regards

Old Hutcho


Old Hutcho - August 27th, 2011 at 05:25 PM

Just a little further information to hand. The R stands for resistor. Whatver that means.

regards

Old Hutcho


68AutoBug - August 27th, 2011 at 05:39 PM

Quote:
Originally posted by Old Hutcho
I just changed the iridium plugs in my Falcon AU11 six cylinder Ford this afternoon, chasing an issue in that engine. I put a new set of NGK IGR5C plugs in the engine, and it didint fix the problem.

So now Ive got a set of iridium plugs sitting on the bench which cost me an arm and a leg and they physically fit my 1916 VW aircooled engine with the bigger heads.

Question now is, will they suit my 1916. They physically will screw into the hole. The reach is the same.

From the NGK site it looks as though they have the same heat range (5) as the plugs Ive got in the engine now (NGK B5HS).

Conversely, does anybody want a brand new set of iridium plugs for $100 incl postage to your place.

regards

Old Hutcho


Hi
I don't know anything about iridium plugs apart from them being expensive.. lol
Both My CE Lancers 1997 & 2002 had normal plugs..
as MITSUBISHI didn't recommend Iridium plugs..

why I don't know...

Te R in the plug code means resistor so they have resistance in the stem of the spark plug.. this is to stop interference to radios TV etc signals..
Modern spark plug leads also have resistance built into them...
for the same reason...
VWs have resistance [resistors[ in the rotor button and the
pieces that fit onto the spark plug leads...

with Your ford...
You could buy one long new spark plug lead that will fit all the spark plugs and replace one lead at a time with the new lead... that will tell You if one lead has broken down...

not sure how many coils Your falcon has as one of those may be faulty too...

best to check everything with an ohms meter to see if everything g is the same or very close in resistance [ohms]

if a coil has a very high or low resistance then its probably the problem...

the silicone leads can be broken very easily inside...
I had a brand new one break just by pulling it off the coil...
You cannot tell by looking at the outside...

cheers

LEE


Old Hutcho - August 29th, 2011 at 07:50 PM

Well the problem turned out to be based on the leads. The leads apparently pack it in, the coil pack works over hard to get the spark to where its got to go and the coil pack eventually cant handle it and packs it in. Laymans terms only.

Its a known problem with this model apparently. So. Ive still got 6 iridium plugs for which I dont have a use.

regards

Old Hutcho