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Robert
| | Posted on Wednesday, January 30, 2002 - 11:57 am: | 
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Welding vs. epoxy has been discussed in a number of the threads here. The subject of brazing and welding and or filling with epoxy is a tough
one i personally watched the whole top end explode when the cylinder broke in half,without the support of the waterjacket all the stress of the explosion is on what is left of the cylinder wall. I have a 4 hp frisco here that split in half and the operator had to have the rings surgically removed from his legs. It is a tough call from both viewpoints, the more support the merrier i think.
Remember if the water jacket was 3/16 thick new and is paper thin now then it rusted equal or more on the heat side(cylinder wall) also..... 2 things going against us here crystalization of the cast iron material and salt water corrosion...when i bored the frisco you could see a color change in the material,i took a scribe and was able to push through the rot.....not good
hence the sleeve.....all new material in the bore and i pressed it in with .004 interference and with a top ridge ...i feel safe with that one now....most of the Hicks and frisco`s i have seen usually bore through the water jacket when people sleeve them .i am aware of 1 right now where that is a problem,they are making a new sleeve from a solid piece $$$ (it is just a hobby right???)
Robert |
Vidar Backmann
| | Posted on Saturday, February 02, 2002 - 07:02 pm: |
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Hello. I have tried to use different sorts of epoxy for waterpipe repairs in the cooling system on my "modern" Volvo Aq145. The experience is that the epoxy will definetly not endure water and have problems with heat. I got hold of Plastic Padding Chemical Steel (and metal) which is a much better choice if treated precicely. Try ot out. |
andrew
| | Posted on Saturday, February 09, 2002 - 10:45 am: |
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One of our visitors just sent me this link to Crows Custom Welding, apparently they do a lot of weld repair of older cast iron and aluminim parts. I have not used them, but it seems that quite a few members of the Antique and Classic Boat Society use them for engine repair.
Regards,
Andrew |
ernie
| | Posted on Sunday, February 17, 2002 - 10:53 am: |
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JB Weld is probably the best way to go. That is as long as it's mixed properly (50/50) and the surface is prepared correctly. You need clean and shiney with good tooth (roughness to give the epoxy to bond to) When used this way the epoxy is probably stronger than the origional metal. I have used JB Weld for over 25 years and have not had a failure yet. It has a temp range to over 500 deg F.
Some of my uses are as follows:
valve seat installation
cylinder bore repair
water jacket repair, both salt and fresh water and iron and aluminum
pitted crankshaft journals (old slow turning only)
also all sorts of non engine things around the shop and house
Hope this helps
Ernie |
andrew
| | Posted on Thursday, March 07, 2002 - 06:11 pm: |
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Gary Baker sent in these photos of some work he had done at Crows Custom Welding...
Quote:Wanted to fill you in on my results from Crow Cast Metal Welding on my Manifold and Water Diverter problems.
Cost was $150 each + shipping for reference. Sounds high, until you see what some stuff sells on ebay...
Pictures attached.
I am quite happy.
Gary Baker
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stephen obrien
| | Posted on Tuesday, April 16, 2002 - 10:18 pm: |
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I have a couple of fine cracks in the water jacket of my simplex single cylinder.
What is JB weld (suggested by ernie), where do I get it?
I'm in Brisbane Australia |
andrew
| | Posted on Wednesday, April 17, 2002 - 09:56 am: |
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Stephen,
Here is a link to JB Weld's European Web Site, I have not checked... but they probably list the locations of other dealers and distributors... maybe Australia. They also have a history and list of products.
There are other lines of products similar to JB Weld. One is Belzona which is used extensively in the commercial marine field... but it is very expensive.
Good luck.
Regards,
Andrew |
peter ogborne
| | Posted on Friday, April 19, 2002 - 08:21 am: |
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Stephen ..............I am a bit closer to you than the US ,I have never been able to get any JBWeld here . Contact me and i will tell you all about it and the success that i have had with another easly available local product BUY AUSTRALIAN ! |
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