Jim E
Donation Time
Bob B. has ask me to build a 1725 for him to replace his 1600 that busted the crank. This is for his SIV.
I have the 1725 out of my S3 that is a fresh build but the block is cracked in the outside water jacket. First I was going to have the crack welded up being a couple guys I know said they could do it... well one finally said nope and the other just never did it.
There was one option which is to stitch weld the crack, this involves drilling and tapping the crack with a special tappered bit and tap then screwing in these tappered bolt looking gizmos and breaking them off, grind smooth and repeat until the whole crack is done. I have seen this done on other engines and it works but the cost of the plugs and the installation is so high it makes more sense to just get a new block, being the crack in my 1725 is over a foot long.
So Bob found a 1725 bare block and we meet up this weekend and I got the block from him, and we talked about the build. Looks like a mild port on the head, lighten up the flywheel, KB grind cam from Delta and I will clean up the casting flash and such on the oil returns for the block and head. So more or less just a basic rebuild with a few small upgrades. That is unless he decides to go chevy rod....
Here is Bob's block in my pickup... now off to the machine shop to see if it will clean up at 30 over and have it checked for cracks...
I have the 1725 out of my S3 that is a fresh build but the block is cracked in the outside water jacket. First I was going to have the crack welded up being a couple guys I know said they could do it... well one finally said nope and the other just never did it.
There was one option which is to stitch weld the crack, this involves drilling and tapping the crack with a special tappered bit and tap then screwing in these tappered bolt looking gizmos and breaking them off, grind smooth and repeat until the whole crack is done. I have seen this done on other engines and it works but the cost of the plugs and the installation is so high it makes more sense to just get a new block, being the crack in my 1725 is over a foot long.
So Bob found a 1725 bare block and we meet up this weekend and I got the block from him, and we talked about the build. Looks like a mild port on the head, lighten up the flywheel, KB grind cam from Delta and I will clean up the casting flash and such on the oil returns for the block and head. So more or less just a basic rebuild with a few small upgrades. That is unless he decides to go chevy rod....
Here is Bob's block in my pickup... now off to the machine shop to see if it will clean up at 30 over and have it checked for cracks...