Silvertop Crank Pulley Vs Smallport Pulley

[rick q]

The crankshaft mounted fan belt pulley on my Silvertop has come loose, hammering the keyway in the pulley.

From ToyoDiy.com, the part number is 13470-16030 but I can't find a replacement readily. The Part No for the smallport pulley is 13470-16010 - so it must be different.

Can anyone tell me what the differences are? Could I use a smallport pulley and machine it or space it to make it work on my Silvertop?

FWIW, the cam belt pulley [also destroyed] is the same part number as the Smallport, and so is available locally from Toyota.

Thanks in advance

[Sam_Q]

I have fitted a bigport to a blacktop, I had to take 3mm off the back of it and then it fit nice.

[rick q]

Thanks Sam.

I found a Smallport one and measured it against by dead Silvertop one and couldn't find any differences [apart from the part number!]

Front pulley now machined off and the clubbie is back on the road!

[SHEPPO3930]

Part number can vary due to different suppliers of the part to Toyota during production.

[Bazda]

20v ST and 16v smallport/big port FWD pulleys are the same.
20v BT has a better harmonic damper and the snout is also 2mm shorter as the crank sprocket is 2mm thicker to accommodate the thicker cam belt.