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Technical Twinair spark plugs

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Technical Twinair spark plugs

AGH1965 said:
Every 5k miles??? That would probably make the oil drain plug the most wearing part of the whole engine!
wink.gif
Click to expand...

Lol! Nice try. The point you are making is precisely the reason why I have a Fumoto Quickvalve fitted to the sump on my Saab. It makes oil changes ridiculously easy. Ditch the sump plug and fit one of these:

http://quickvalve.co.uk/
 
AGH1965 said:
.....
Slightly off-topic, but are these TA coils really made by Bosch? I'm pretty sure that Beru was the supplier in the past.
Click to expand...


Off-topic, not really....

Yes, the coils are labeled "BOSCH", also in my car.
 
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AGH1965 said:
Slightly off-topic, but are these TA coils really made by Bosch? I'm pretty sure that Beru was the supplier in the past.
Click to expand...
I could be wrong.

Our 500TA is a 61plate September 2011 baby.

I'm sure I read Bosch, but without taking the air filter box off again, I cannot be sure. Maybe my old eyes are being misled. I had my glasses on, but maybe it's my memory failing. :cry:

I intend having another go at getting the plugs out in the next day or two, and I'll make a note of what it says exactly.

Cheers,
Mick.
 
zanes said:
Why do you think BMW and others have been seeing timing chain "stretch" (in reality, wear on the plates where the pins pivot) problems recently?
Click to expand...
I assume this has to do with very popular low quality chains. (Even most bicycle chains are rubbish nowadays.) Do you suggest that it's caused by the oil change interval?
 
AGH1965 said:
I assume this has to do with very popular low quality chains. (Even most bicycle chains are rubbish nowadays.) Do you suggest that it's caused by the oil change interval?
Click to expand...

Yes. Otherwise, given that the same manufacturers supply to multiple OEMs, wouldn't you expect other brands that heavily use timing chains to be similarly affected?

Equally, would you take the risk for a few oil changes?
 
I stand corrected. :worship:
The coils on my 500TA are indeed Beru.

.............................

Next problem:
After taking advice on here, I bought a magnetic 16mm spark plug spanner and I've just pulled the Beru coils off and attempted to get the plugs out but the socket won't go all the way down.

The plugs are a heck of a long way down through the cylinder head but the socket will only go part way down. There's a sort of offset ledge half way down as if the holes haven't been bored exactly in line. Maybe a millimeter maximum of a ledge.

My spark plug spanner is 22.75mm outside diameter.
Can you get slimmer ones?
Should I get mine slimmed down on a lathe?

Thanks guys,
Mick.
 
Mick F said:
.....



My spark plug spanner is 22.75mm outside diameter.

Can you get slimmer ones?

Should I get mine slimmed down on a lathe?



Thanks guys,

Mick.
Click to expand...


I used a spanner 22.1 mm outside diameter, with a rubber tube inside, to stick on spark plug insulator and contact pin.....

LarsLarsen
 
So it looks like I only need a light dressing off mine.
I don't need this plug spanner for anything other than our TA, so I don't mind dressing it off a little. Seems pointless and a waste of money to buy another.

Thanks,
Mick.
 
You can buy 'thin wall' sockets, I would imagine these are made of a stronger steel than regular walls sockets. If you simply turn one down you risk it cracking and expanding when torque is applied and it may be just about impossible to remove.

I'd buy the correct tool (y)
 
Good point UFI.

It looks like I need to take less than 1mm off and the walls are quite thick.

I can't do the maths, but a double-hex 16mm AF in a 22mm circle gives what wall thickness?
Anyone got the brain for it? I know I haven't! :)

Tell you what, when I've got it so it'll fit, I'll find a 16mm bolt or something and swing off it to test the torque capability before I attempt the plug removal/replacement.

The plug spanner is good quality and cost me a £8 from a discount store. It's a Sealey Premier.
http://www.sealey.co.uk/PLPageBuilder.asp?id=20&method=mViewProduct&productid=5667

Cheers,
Mick.
 
Just looked at the socket, and it's a single hex.
My other plug sockets are double-hex, so I expected this one was too.

Any road up, just measured the wall thickness at the minimum where the hex max diameter is, and it's 2.2mm.

Therefore, if I take 1mm off the total outside diameter, I will reduce the wall thickness from 2.2mm to 1.7mm

Mick.
 
New plug spanner arrived today and it fitted!
O/S diameter is 21.6mm as opposed to the one that didn't fit at 22.8mm.
That's a difference of only 1.2mm, but it made all the difference!

Not started the engine up yet, maybe later.

......................................................

Next question:
Now I have the old plugs out, I see they are numbered 55233997
New plugs from Shop4Spares is 55242187

Does this make any difference?
They are visually identical.

Also the old plugs have a spark gap of 31thou (as measured with my elderly feeler gauges) and the new ones at 25thou. Hopefully, the difference is because of the old ones having done 18,500miles.

Anyone like to comment on the new plugs?

Thanks,
Mick.
 
Mick F said:
New plug spanner arrived today and it fitted!
O/S diameter is 21.6mm as opposed to the one that didn't fit at 22.8mm.
That's a difference of only 1.2mm, but it made all the difference!

Not started the engine up yet, maybe later.

......................................................

Next question:
Now I have the old plugs out, I see they are numbered 55233997
New plugs from Shop4Spares is 55242187

Does this make any difference?
They are visually identical.

Also the old plugs have a spark gap of 31thou (as measured with my elderly feeler gauges) and the new ones at 25thou. Hopefully, the difference is because of the old ones having done 18,500miles.

Anyone like to comment on the new plugs?

Thanks,
Mick.
Click to expand...


Does the spark gap increase with age? Not sure. The different gap might be explained by the different part number perhaps?
 
Mercky said:
Does the spark gap increase with age?
Click to expand...
In my (rather out of date experience) the gaps increase as the plug wears due to the billions of sparks throughout its life.

These are the first plugs I've replaced in maybe 15years. We have run a Clio in all that time and always had her serviced professionally, and before that ran Mini after Mini after Mini. Easy and simple DIY plug changes on the A Series engines, and you could change the gaps too! :)
For many years, running Champion N9Y plugs. Cheap as chips back then.

Yes, I reckon plugs wear as they age, but is the difference also the part number difference???

Thanks,
Mick.
 
Mick F said:
Next question:
Now I have the old plugs out, I see they are numbered 55233997
New plugs from Shop4Spares is 55242187

Does this make any difference?
They are visually identical.
Click to expand...
ePER says this:

sparkplug.png


FIAT replaced 55233997 by 55242187. So, you have the right spark plugs, but I don't know what the difference is. That can be anything. They can be better or cheaper or whatever...
 
AGH1965 said:
ePER says this:

sparkplug.png


FIAT replaced 55233997 by 55242187. So, you have the right spark plugs, but I don't know what the difference is. That can be anything. They can be better or cheaper or whatever...
Click to expand...

Well theres your answer Mick, I'd be interested to hear if you notice any difference in terms of performance and economy
 
Mick F said:
New plug spanner arrived today and it fitted!

......................................................

Next question:
Now I have the old plugs out, I see they are numbered 55233997
New plugs from Shop4Spares is 55242187
Click to expand...

Mick

nice... you got a spanner that fits. I think I mentioned in an earlier post I bought my spanner from Halfords, it was a good price.

I bought the same plugs from shop4parts and they are fine on my TA.

PART NUMBER: S4P9057
OEM NUMBER: 55242187 / 55229633

btw: for quicker answers, probably worth tagging people or quoting their posts, some people don't log on everyday but will get an email from FF.

Good luck

edit... you have the answers already :)
 
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