General Missing part

hodgy18 · Sep 20, 2018

More on the infamous over heating with the bambibos! When talking to a ex-fiat employee at the car show at Bywell. He pointed out that I should have some lugs on the top of the spark plug to avoid the cold air escaping from blowing across the engine. Until tonight when I started it and revved it, did I realise what he meant. There must be literally no air going across the engine and all out the top.

I haven't been able to find any of these rubber lugs? Anyone know where to get some?

Vitesse · Sep 20, 2018

hodgy18 said:
More on the infamous over heating with the bambibos! When talking to a ex-fiat employee at the car show at Bywell. He pointed out that I should have some lugs on the top of the spark plug to avoid the cold air escaping from blowing across the engine. Until tonight when I started it and revved it, did I realise what he meant. There must be literally no air going across the engine and all out the top.

I haven't been able to find any of these rubber lugs? Anyone know where to get some?View attachment 194323

Ricambio sell them.

http://www.ricambio.co.uk/69-fiat/2...spark-plug-rubber-cover--classic-fiat-500-126

hodgy18 · Sep 20, 2018

Many thanks - no idea why i couldnt find that. Much appreciated [emoji106]

AndrewRL · Sep 21, 2018

So....he asks embarrassed

...do I assume that all 500 engines should have these? Mine never has (500cc) since I got it and the large holes round each plug lead have always terrified me (so regularly plugged with something when working on the engine to stop nuts/bolts disappearing

). Looks like something to add to the next order

BambinoClassic · Sep 21, 2018

Mine didn’t have them either when it arrived in my hands but it was such a cheap and easy addition I couldn’t understand why it had been omitted

hodgy18 · Sep 21, 2018

Just ordered a pair off eBay £4. I couldn't believe how much air blow out the holes when the engine was revved. I can understand now how the engine will be lacking a lot of airflow from missing such a simple part.

Uaglio · Sep 21, 2018

AndrewRL said:
So....he asks embarrassed ...do I assume that all 500 engines should have these? Mine never has (500cc) since I got it and the large holes round each plug lead have always terrified me (so regularly plugged with something when working on the engine to stop nuts/bolts disappearing ). Looks like something to add to the next order

Yes, definitely part of the air cooled design. Air flows across the top of the block and continues down the right side. If you leave the spark plug holes uncovered, you're letting cooling air escape and diminishing cooling capability. There's a lot of that air flow routing stuff on this engine.

Luxe · Sep 21, 2018

They look like this installed. Mine where missing too.

Toshi 975 · Sep 21, 2018

Luxe said:
They look like this installed. Mine where missing too.

View attachment 194330

I always enjoy looking at other engines to see how they look

I see that you have one of the repro modern Weber carbs fitted. The engine earth strap would normally fix to one of the bolts holding the Dynamo bracket to the crankcase and run across to one of the rear panel studs. Clutch arm return Spring looks to be missing and do you have a syncro gearbox fitted there ?

F123C · Sep 22, 2018

When fitting these spark plug covers, remember to fit them as shown in the little picture on the Ricambio site i.e. the outer lip goes into the hole to locate the covers so that the air flow doesn't push the covers upwards. You need to rotate them also for the best fit - there's should be a step on the circumference to take account of the difference in thickness of the cylinder head flange and the cowling sheetmetal.

AL.

Bleeding Knuckles · Sep 22, 2018

hodgy18 said:
More on the infamous over heating with the bambibos! When talking to a ex-fiat employee at the car show at Bywell. He pointed out that I should have some lugs on the top of the spark plug to avoid the cold air escaping from blowing across the engine. Until tonight when I started it and revved it, did I realise what he meant. There must be literally no air going across the engine and all out the top.

I haven't been able to find any of these rubber lugs? Anyone know where to get some?View attachment 194323

Hi Hodgy, Any air lost from the cooling fan (at any point) is costing you money in terms of engine performance and longevity, these engines run hot, but not too hot - overheating is bad news. Trust me I've been there

Ian.

Luxe · Sep 24, 2018

You spotted the repro carb. It had a 126 carb when I bought it. I took the return spring off when overhauling it.

General Missing part

Currently reading:
General Missing part

hodgy18

Established member

Vitesse

RIP

hodgy18

Established member

AndrewRL

Member

BambinoClassic

Patron member

hodgy18

Established member

Uaglio

New member

Luxe

Member

Toshi 975

Prominent member

F123C

Established member

Bleeding Knuckles

Patron member

Luxe

Member

Similar threads

General Missing part

Currently reading: General Missing part

Established member

RIP

Established member

Member

Established member

New member

Member

Prominent member

Established member

Member

Similar threads

Currently reading:
General Missing part