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graham361
New member
Username: graham361
Post Number: 1
Registered: 02-2020
| | Posted on Tuesday, February 18, 2020 - 10:37 am: | 
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Hi hope somebody can help I have a Stuart turner p6 dynostart removed from my clinker boat 🚣‍♀️ the engine is siezed solid have stripped right down to block and soaked in diesel now bolted to bench and even with long bar and tapping piston with block of wood will not move I do not have Manuel can anybody tell me how do you get to piston regards graham |
miro
Senior Member
Username: miro
Post Number: 1069
Registered: 11-2001
| | Posted on Friday, February 21, 2020 - 03:04 pm: |
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Depends on how long you have been soaking the engine.
If anything less than a week or two, you've not been soaking it long enough.
Try 50/50 mix of acetaone and automatic trensmission fluid.
Keep the head covered with tin to reduce the evaporation of acetone .
I've used a small hammer drill, set to hammer only with a soft edged stub in the chuck to transmit the vibrations using a gently but steady application of the hammering. I set it to the highest possible speed.
Sort of like a dentist drill hammer.
This of course needs patience and lots of it.
The whole idea is to use seepage, not brute force to get the fluid to the area of the rusted parts.
Some have tried plugging the water jacket and pour in boiling water to get the jacket to expand slightly. This probably works better on bigger engines.
In the worst case you can machine out the piston and get a new one to replace it - a real last resort. |
chris_spring
Advanced Member
Username: chris_spring
Post Number: 36
Registered: 02-2019
| | Posted on Saturday, February 22, 2020 - 07:39 am: |
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I have seen it done where a steel plate and gasket has been fitted and torqued down in place of the cylinder head. The plate has a fitting that allows a hydraulic hand pump to be connected. With a guage attached it is possible to see how much pressure is being applied when pumped. As well, it is possible to measure leakage. With pressure applied, if the piston doesn't break free, it can be left to allow the acetone/transmission fluid will do its work over time.The cylinder head plate might require the work of a machinist, but it may be a viable option.
Cheers! |
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