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General Fiat 500F rejuvenation
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General Fiat 500F rejuvenation
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Cor, your car has a big head!
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Amazing the difference between a standard 500 head and the 650?
Starting to think that after 3 years I might have my own engine in the car soon.
Starting to think that after 3 years I might have my own engine in the car soon.
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It is actually the small block big barrel 650?
Hope it doesn't shred the tyres too badly
Hope it doesn't shred the tyres too badly
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Installed the crankshaft today
Went to put the new rods on new pistons and the gudgeon pins were able to be pressed on but not lined up in the centre
Are they supposed to be really tight? Do I just heat the ends of the rods to get them as central as possible and then assume the heat of the engine will make them just right when running??
Went to put the new rods on new pistons and the gudgeon pins were able to be pressed on but not lined up in the centre
Are they supposed to be really tight? Do I just heat the ends of the rods to get them as central as possible and then assume the heat of the engine will make them just right when running??
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No- the pins should be able to 'float' on the gudgeons- you might need to get the small end bushes reamed to allow some running clearance.
Also make sure you get the pistons the right way around- the gudgeon pin should be offset towards the camshaft.
Also make sure you get the pistons the right way around- the gudgeon pin should be offset towards the camshaft.
the hobbler
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When I was at Radbourne Racing, the trick was to put the piston on the workbench (top of piston sitting on bench), put a little bit of petrol into the piston, and light the petrol. This would heat the piston enough that the gudgeon-pin (wrist-pin for our American colleagues) could be easily slid into the piston. (A) make sure you have a fire extinguisher close to hand, (B) do it in an area clear of any combustibles, (C) have everything to hand (ie, con-rod, gudgeon-pin etc) and (D) make sure you have a heat-proof glove to hand--the piston will be HOT (an old oven glove will suffice--make sure 'er indoors is out of doors!). Damon is absolutely correct, when all has cooled down, the con-rod should be able to move easily on the Gudgeon-pin.
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Thanks for the replies
As the rod was very tight on the gudgeon, even after warming the small end a bit, I took them to the machine shop today and they teamed a tiny bit off the bush
Now floating nicely
I also tested the piston height in the barrels and it sits just below the top of the barrel so no need for spacers
My dad is staying so he got the tinware sandblasted and it's now painted
Slowly getting things done
As the rod was very tight on the gudgeon, even after warming the small end a bit, I took them to the machine shop today and they teamed a tiny bit off the bush
Now floating nicely
I also tested the piston height in the barrels and it sits just below the top of the barrel so no need for spacers
My dad is staying so he got the tinware sandblasted and it's now painted
Slowly getting things done
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When I was at Radbourne Racing, the trick was to put the piston on the workbench (top of piston sitting on bench), put a little bit of petrol into the piston, and light the petrol. This would heat the piston enough that the gudgeon-pin (wrist-pin for our American colleagues) could be easily slid into the piston. (A) make sure you have a fire extinguisher close to hand, (B) do it in an area clear of any combustibles, (C) have everything to hand (ie, con-rod, gudgeon-pin etc) and (D) make sure you have a heat-proof glove to hand--the piston will be HOT (an old oven glove will suffice--make sure 'er indoors is out of doors!). Damon is absolutely correct, when all has cooled down, the con-rod should be able to move easily on the Gudgeon-pin.
Using fire to warm the Pistons instead of hot water as recommended in Haynes manual sounds like more fun.
But my dad noticed this in my 1973 Haynes manual last night
"5 Waste disposal - Old oil and cleaning paraffin must be destroyed. It makes a good base for a bonfire..?
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My dad gave me a round tuit today so I started assembling the engine.
Found some rough edges in the casting of the new cam so smoothed them out.
Put the cam in then found out the tab washers for the timing gear are lost. (I dismantled the engine a few years ago so cannot be sure they were there at the time.). Have temporarily bolted timing gear on so I could keep going.
I was able to install the Pistons without ring compressor without much effort.
Barrels and Pistons went in ok and big end bearings done up.
Head is also on.
Will post some pics soon
Found some rough edges in the casting of the new cam so smoothed them out.
Put the cam in then found out the tab washers for the timing gear are lost. (I dismantled the engine a few years ago so cannot be sure they were there at the time.). Have temporarily bolted timing gear on so I could keep going.
I was able to install the Pistons without ring compressor without much effort.
Barrels and Pistons went in ok and big end bearings done up.
Head is also on.
Will post some pics soon
