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pauly45
United Kingdom
435 Posts |
 Posted - 21/02/2012 : 18:56:15
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Hi,
I wish to get my engine block properly cleaned so the hole from the waterway into the crank area can be properly assessed to see if it's repairable.
I've been told that I should get the block "acid dipped" which cleans the block to look "like new", and cleans just about everything internally and externally.
Internet reading seems to indicate the process is not actually an acid, but an alkali.
So the question is - what is the name of the process that I'm after, and where do I go to get it done.
Somewhere in essex/suffolk would be ideal so I don't have to post the block.
By the way, here is the damage to the block - any thoughts on repairability anyone ?
It's the hole between the two bores above the circular hole in the block side.
Thanks
Paul.
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Edited by - pauly45 on 21/02/2012 19:07:06 |
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Orstin
United Kingdom
637 Posts |
Posted - 21/02/2012 : 19:52:52
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I think you might be able to get this done at Ivor Searle at Soham, Cambs - is that near enough Esssex/Suffolk? I've not had a block done there, but they have done a similar service on a crank for me, recently..
http://www.ivorsearle.co.uk/
I know it looks like it's all modern stuff, but they understand 'proper' cars..
So many dynamos |
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Hornet
United Kingdom
381 Posts |
Posted - 21/02/2012 : 21:20:24
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| depends on the hole size as it is difficult to judge, but you could try and mill/drill the hole and fit a threaded plug seal with loctite or soft solder. |
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bahnisch
Australia
674 Posts |
Posted - 21/02/2012 : 22:32:40
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| I agree with Hornet. I would only apply heat (such as a weld), especially on old cast iron, as a last resort. |
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Alan Bertram
United Kingdom
199 Posts |
Posted - 21/02/2012 : 22:57:04
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If your casting is thick enough when the hole is enlarged, it may be possible to machine a seat to fit a dished core plug to seal the hole. These seem to start at 5/8" diameter on this web site http://www.coreplugs.co.uk/index.php?option=com_virtuemart&page=shop.browse&category_id=29&Itemid=1
Alternatively a cup type core plug with a suitable heavy duty sealant, these start at 1/2" diameter. Paul have you removed the core plug by your No4 cylinder for a look in to the other side of your hole?
Just some thoughts,
Regards, Alan
PA 0397 |
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Terry Andrews
United Kingdom
546 Posts |
Posted - 21/02/2012 : 23:40:31
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Paul,
Not Essex but South East London..... look up "I Cleenz Machines" for are really comprenhensive service. They have contacts for other services...... so may be able to help with your hole problem .... Terry A  |
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dade
United Kingdom
510 Posts |
Posted - 22/02/2012 : 09:27:49
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Hi Paul
Try Thurston Engineering at Stondon Massey, Ongar, Essex they have a good web site.
Russ
PB 0333 |
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etlanpa
United Kingdom
560 Posts |
Posted - 22/02/2012 : 09:52:11
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I would never use a core plug internally on an engine - if anything a threaded plug should be used...
However, why not send it straight to someone like Technistitch, Slinden, StitchWeld or Surelock? I'm sure a new piece could be stitched in.
I've used Surelock & Technistitch - both are very good. |
Edited by - etlanpa on 22/02/2012 09:56:36 |
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pauly45
United Kingdom
435 Posts |
Posted - 22/02/2012 : 17:03:47
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Thanks everyone.
I haven't removed any other core plugs, although I must admit I can't remember seeing any others. Will look more closely, but the block isn't at my house, so can't just nip out to have a look.
The hole is approximately the size of a pound coin.
A threaded plug sounds like a reasonable idea, probably better than the risk of a plug falling into the crank area !
I'd like to investigate the possibility of having it stitched. I sent a request and photos to "Technilock" who someone at the Stoneligh show recommended, but they have so far not even replied to me.
Cheers
Paul.
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pauly45
United Kingdom
435 Posts |
Posted - 23/02/2012 : 17:21:43
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Unfortunatley Thurston Engineering at Stondon Massey, Ongar is a no go for the cleaning I'm ideally after. They replied with :
"We can only offer you a hot wash in our degrease it will not clean it to the standard you are looking for. With the health and safety restrictions these days you may struggle to find someone who can do what you want." |
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Horst Wendling
Germany
464 Posts |
Posted - 23/02/2012 : 19:45:54
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Paul,
i had contact with a laser welding specialist in germany for different jobs (Gearbox, Trafficators, Gear lever).
Look to a company, who have the new technologie.
In my eyes it is one of the solutions for your hole.
Laser welding brings not so much heat in and a welding line is very fine -like a needle-.
Horst
PA492 |
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Oz34
United Kingdom
2522 Posts |
Posted - 23/02/2012 : 23:06:34
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'ealth & 'fficiency is a wonderful thing isn't it? On the Twin Cam Group there was a lot of discussion among the US members a while ago about "hot tanking" & the wonders it produces. I believe you can still get cad plating done over there as well.
Dave |
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John Reid
United Kingdom
704 Posts |
Posted - 24/02/2012 : 00:47:00
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For information - you can still get Cadmium plating done in the UK - we had some aircraft bolts for the Chipmunk plated last week. It is still an essential process in the aircraft industry, and there are UK companies who have the correct safe process.
John R |
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Gordon
United Kingdom
691 Posts |
Posted - 24/02/2012 : 06:27:02
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I wonder whether laser welding will not produce cracks in or adjacent to he weld? The thermal stresses still have to be accommodated. Cracks as such will be finer but surely just as dangerous. I would go for stitching in a piece to fill in the hole but it all depends whether there are any other thin corroded areas.
Gordon
PB 0331, MG4473
Derby |
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pauly45
United Kingdom
435 Posts |
Posted - 24/02/2012 : 19:56:59
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I received a reply from Technilock regarding repairing the hole :
"We can offer you a guaranteed repair.
The holed area would be cut back to thicker material, making a triangular shape.
Bores would be strapped in order to retain their shape.
The hole would have a new cast iron section fitted, metal stitched to secure and seal, then pressure tested."
And for this : £575
Ouch.... |
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Horst Wendling
Germany
464 Posts |
Posted - 24/02/2012 : 20:59:10
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Paul,
ooohps..... 575 is near half of a new Block !
Gordon,
with laser welding i meant to insert a plug and weld it in. Laser welding make not so much heat in and with breaks it is a little more as "hand-warm". This is one of the benefits from this process. I would not spend more as 100,-- for this work.
Horst
PA492 |
Edited by - Horst Wendling on 24/02/2012 20:59:41 |
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