Hi from New Zealand. Apparently I haven't been on since 2012, probably because we have done a stint in Australia. Finally back and reunited with my 57 Olds 88. She has the original 371 tri-power engine, but on our return promptly threw her harmonic balancer. The guy who is re-attaching it to the pulley for me, needs a couple of measurements. Firstly the diameter of the end of the crank, which I have in metric with the use of a micrometer (but imperial would be a help). More importantly is the size of the front seal (behind main pulley). So if anyone can give me the internal, external and depth/thickness measurements of the seal it would be much appreciated. Cheers Lorry` gmail me if poss on gloria.haycock@gmail.com

 

Welcome back,I dont have the dimensions but Ron's Classic car gasket's ( on EBay) has the front timing seal listed by itself,for $10! Hope this helps.
If this don't help, you should Email Ross Racing Engines or Mondello Olds Engines, they both are well known for Oldsmobile engines.. Good luck ,Larry

 

http://www.mm-to-inch.com/

http://www.rockauto.com/en/moreinfo....488717&jsn=405

 

Cheers for that, I am all sorted for the dimensions. BTW My name isn't a typo, it's Laurie but spelling is Lorry, go figure. Thanks again for you input.