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Old 30-05-2014, 12:41 PM   #1
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Country: UK
Occupation: Engineering
Boat name: Tennesse
Boat make: Pantera 24
Engines: 454 Mercruiser

Join Date: Dec 2006
Posts: 33
Big block engine builders

Stupidity and sloppy winterizing has resulted in a siezed block which hopefully is not cracked. (water drianed / anti freeze added but I have seen clear water pockets in the block..)

Not sure yet if I will build it or put it out but I will need to dye or sonically crack check it - do you know some good builders who could help?

Im in South West - boat is in North Devon.

Heads are off and so far I see that condensation on No 2 cyclinder has created rust nodules (which can be removed by screwdriver leaving a stain which should hone out) and there seems to be some gasket leak at No 7 cylinder which might be a bit tricky at this is at TDC but it has been soaking in auto fluid for 3 weeks. Also the plate under the intake manifold is covered in rust! Is this normal?

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Old 30-05-2014, 06:28 PM   #2
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Posts: 15
I can recommend Mike Bontoft in Poole. 07843 947949 or

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Old 30-05-2014, 10:07 PM   #3
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Country: UK
Location: Poole Dorset, UK
Occupation: Company Director
Interests: Boats & Boats
Boat name: Kalaazar & " Side Winder "
Boat make: Fairline Targa 48, Magnum 27 Sport (1971)
Engines: Volvo 73P`s 430hp. Dart/Bontoft 383 ci`s
Cruising area: Poole Bay Etc

Join Date: Apr 2007
Location: Poole Dorset, UK
Posts: 136
Originally Posted by Loca View Post
I can recommend Mike Bontoft in Poole. 07843 947949 or
Mike has just built me two new Dart 383 based motors, he totally meticulous

about what he does. Not the man if second best is good enough.

Ian Toll
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