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1969 small block cast waterpump bolt lenghts #2375892 09/24/17 01:23 PM 09/24/17 01:23 PM
Joined: Mar 2005 Posts: 175 Minnesota USA D Dart6pak OP member
Dart6pak OP member D Joined: Mar 2005 Posts: 175 Minnesota USA	Just finishing off the rebuild on a 1969 340 with cast waterpump-what are the correct bolt lenghts ---They seem to be sets available for 70 and up but they would be longer because of the aluminum waterpump

Re: 1969 small block cast waterpump bolt lenghts [Re: Dart6pak] #2376032 09/24/17 07:40 PM 09/24/17 07:40 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	I dont have a pump in front of me but what I would do is stick some bolts into it on your bench with some lock washers & you want (iirc) 1&1/4 times or a slight bit more than the bolt shank dia, that length of threads to engage into the block. add in the timing cover thickness & its (2) gaskets live every 24 hour block of time like it's your last day on earth

Re: 1969 small block cast waterpump bolt lenghts [Re: Dart6pak] #2376042 09/24/17 08:20 PM 09/24/17 08:20 PM
Joined: Nov 2007 Posts: 21,825 Kirkland, Washington Pacnorthcuda Too Many Posts
Pacnorthcuda Too Many Posts Joined: Nov 2007 Posts: 21,825 Kirkland, Washington	I always run a bolt in all the holes till it lightly bottoms out in the block then measure for the proper length. This ensures your bolts aren't too short or long. You DONT want a bolt to bottom out in the block on the actual install!

Re: 1969 small block cast waterpump bolt lenghts [Re: Pacnorthcuda] #2376044 09/24/17 08:22 PM 09/24/17 08:22 PM
Joined: May 2003 Posts: 96,662 On The Boat, On The Lake, Wa. ... amxautox Still Retired. Still Posting on Moparts. A Lot.
amxautox Still Retired. Still Posting on Moparts. A Lot. Joined: May 2003 Posts: 96,662 On The Boat, On The Lake, Wa. ...	Originally Posted By Pacnorthcuda I always run a bolt in all the holes till it lightly bottoms out then measure for the proper length. You DON'T want a bolt to bottom out in the block on the actual install! Yup, a bolt too long WILL break the cylinder wall, it's been done. Tom "Everyone should believe in something; I believe I'll go fishing." -Henry David Thoreau Men and fish are alike. They both get into trouble when they open their mouths author unknown

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