Originally Posted by
Tank
Thank you all, seems I have been giving you the wrong info.
I confused the water/oil heat exchanger bolts with the compressor drain back mount and bracket.
Got the bolts out today, they are 7/16 NF, not 3/8 UNC as I previously stated.
These 7/16 bolts have about 1 1/4" thread in the block and about 3/8" comp. bracket flange to get through, with the washers there is 1 3/4 bolt length from under head bolt to end of bolt.
Problem is that they are threaded right to the bolt head, no shank, the old bolts had been polished and removed most of the thread where the comp. bracket sat on the threads.
Bought some new 7/16 NF bolts with a 1/2 of shank under the bolt head, which are a nice fit in the bracket holes.
Now I can only get 2 of these new bolts in because of the cursed heat exchanger being in the way, so tomorrow I'll get 2 studs made up with an inch thread on the block end, a 1/2" shank to fit through the bracket and washers and a 1/2 thread for the locknut.
May have to trim to get in but as I don't have a bolt head to wangle in there it should do the job, will keep you all posted, Regards Frank.