Crankshaft pulley bolt

[Todd]

Anyone know what size of socket is used on the crankshaft pulley bolt? I'm in the process of replacing my timing belt and need to turn the engine over.

[lanciahf]

38mm for 1800 & 2000

[mbouse]

someone do the math.... although I cannot recall the exact size right now, there is an inch measurement socket that is a direct size swap for the metric socket listed above. Might be tremendously easier to find the "American" size socket as opposed to the metric socket.

[manoa matt]

38mm = 1 1/2"

conversion from milimeters to inches: miltiply milimeters by 0.03937
conversion from centimeters to inches: miltiply centimeters by 0.3937

conversion from inches to milimeters: miltiply inches by 25.40
conversion from inches to centimeters: miltiply inches by 2.54

I've got a 1 1/2" socket that works perfect for that nut, no play or chance of rounding the points over.

[Todd]

OK thanks. To convert to inches, divide by 25.4. So I get 1.5" socket.

[racydave]

Once I was lucky nuff to break mine loose with a long breaker bar and pipe,( in 4th gear with brakes applied ) but last time I had to partially remove the radiator and use a 1/2 in impact. is a knucklebuster! good luck! If youre only turnin the eng over, try 1st gear or reverse, and push it.

[manoa matt]

If you only need ot turn it over to change the belt, then remove all spark plugs and the coil to distributor wire. Remove the radiator fan and that should give you the room to turn the crank over. Once the plugs are out and the car in in neutral you might be able to turn the main crank pully by hand. I usually place a piece of foam core board in back of the radiator so I don't damage the fins and tubes while turning the crank.

Depending on your model you may or may not be able to get the timing belt onto the toothed cog of the main crank pully without removing the pully. On earlier cars (78 and earlier ) you can replace the belt without removing the crank pully. On 79 and newer there is a flange on the oil seal carrier that will prevent this requiring you to remove the nut and pully to get the belt on.

I have a few pictures of the process for a 78 and a few pictures of the socket and "wrench" I made to turn the engine over.
I think its in general maintenance or in fiat spider related. It should be labeled "iming belt repalcement"or "removing the crank pully" Sorry its been over a year and I cant remember the exact heading of the thread.

[Todd]

With a pair of gloves on (for better grip), it's actually pretty easy to turn the engine over. I have a 1980 and didn't need to remove the crank pulley to get the timing belt off. Just move the timing mark bracket out of the way and it slips right off. The tensioner is a bitch to loosen, nothing to really pry on.

[Dawgme85]

For once the search function in a forum worked as expected!

I am in the middle of replacing the timing belt in my son's 1800 engine (before we install the engine in his BS Spider) and needed the socket size for removing the crank pulley nut. Now I can go get one and finish the job.

Thanks to all who support this great forum.