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  #1   IP: 159.108.3.19
Old 10-06-2014, 12:33 PM
JimF JimF is offline
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water jacket stud vanished

Boat just went on the hard, and in the middle of my fall acid flush, my bilge started filling with putrid water, when I traced the problem, I discovered water pouring from a hole in the water jacket where one of the bolts that hold it to the side of the block was supposed to be. The bolt was simply gone and I know it wasn't gone when I turned the engine on to do a fresh water flush first. All other bolts were still tight on, can't imagine how this happened, seems like cause for concern. Interestingly I was planning on replacing the jacket in the spring because it was looking a bit corroded. But not around that bolt hole.

Anyone ever seen anything like this?
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  #2   IP: 161.213.49.150
Old 10-06-2014, 01:04 PM
JOHN COOKSON JOHN COOKSON is offline
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This happens.
Apparently at some time in Universal's history they built a series of engines and used some mild steel bolts to fasten the side plate which tend to rot away.
If fact it is so common that our host offers a repair kit that replaces the bolts with studs. (Part # COST_04_307)
You will need to go to studs if the threads in the block are shot.
If you use studs and JB weld them in place line them up by loose bolting the side in place before the JB weld hardens.

TRUE GRIT
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  #3   IP: 24.152.131.153
Old 10-06-2014, 06:24 PM
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ndutton ndutton is offline
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Maybe those Universal guys were on to something

Those mild steel bolts are a blessing when they have to be drilled out after breaking. On my current project engine I broke 7 of the 8 while removing the sideplate. No problem, easily drilled, retapped and good to go without block damage.
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1977 Catalina 30
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prior boats 1987 Westsail 32, 1970 Catalina 22
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  #4   IP: 32.211.28.40
Old 10-07-2014, 05:40 PM
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Al Schober Al Schober is offline
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Neil,
I've gotta disagree - use of bolts in that joint was just a poor design detail. Those holes are drilled and tapped through to the water jacket, hence the bolts form a coolant boundary - and no amount of goop will keep them tight! Look at the number of blocks with extensive corrosion below the cover.
Studs are the way to go - set them in the block with sealant (JB Weld) and you've eliminated 8 leak paths. Did mine years ago with brass studs made from a length of all-thread, then used SS nuts. Others have used SS set screws as studs with brass or steel nuts. Either way, the leaks are gone.
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  #5   IP: 108.90.160.12
Old 10-07-2014, 08:25 PM
The Garbone The Garbone is offline
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When I put in the my repair studs w backing plate an built up the edge of my jacket, I wrapped my new stainless water jacket cover (also from our host) in wax paper. I was worried about gluing the plate on with the weld. Worked great. May have been overkill.
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  #6   IP: 24.152.131.153
Old 10-07-2014, 08:46 PM
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Thanks Al. You really made my day.
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1977 Catalina 30
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prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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