jamesbond007ltk
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 posted on 25/10/12 at 03:53 PM |
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Have I killed my pinto? - bore corrosion
Hi all,
After a bit of advice. My engine has been out of the car for several years and for the best part of that time has been regularly turned over by hand,
kept lubricated etc (stored inside with all ports bunged and plugs left in). That is until the last 6 months or so during which, for one reason and
another, I have barely touched it, or at least not often enough. This occurred to me the other night so attempted to turn it over. As soon as I felt
some resistance I whipped the plugs out and had a look into the bores. To my horror I saw rust in no.3 so off came the head for a closer look. I found
what can only be described as rusty paper that crumbled to power in my fingers. I have no idea what it actually was or how it got in there. Perhaps a
rag that was in a port or something? Anyway, whatever it was has clearly attracted moisture.
So my question is, is it dead? What can I do if anything with my engine? It is a 16 block Cortina Pinto that I bought as a reconditioned engine a
number of years ago. It has already had a mild overbore by 0.75.
Thanks in advance
Rich
 
Pinto_1
 
Pinto_2
 
Pinto_3
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clairetoo
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| posted on 25/10/12 at 04:17 PM |
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That looks like alluminium oxide from the piston - not great , but not that bad . I would seal around the piston with some grease , clean the bore
with a bit of 240 grit , and see how it runs .
Its cuz I is blond , innit
Claire xx
Will weld for food......
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jamesbond007ltk
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| posted on 25/10/12 at 04:41 PM |
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Thanks Claire. The piston itself actually looks intact; although I realise no much material would be lost by corrosion. What is concernig me most is
that material is 'missing' from the cylinder wall. It is not an amount that I could measure but can certainly be felt with a finger nail.
Could this cause blow by problems or premature ring wear?
I should add that the photos were taken after I had mildly cleaned and rubbed down the cylinder.
quote:
Originally posted by clairetoo
That looks like alluminium oxide from the piston - not great , but not that bad . I would seal around the piston with some grease , clean the bore
with a bit of 240 grit , and see how it runs .
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snapper
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| posted on 25/10/12 at 05:12 PM |
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Next step would be to hone the bore, if the corrosion is not completely removed by the hone then you will need a rebore and new pistons
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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jamesbond007ltk
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| posted on 25/10/12 at 05:34 PM |
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thanks for you help and advice. How much material would a hone remove from the bore? Would my existing piston and rings still create a good enough
seal? Would i have to hone all cylinders to ensure balance?
Sorry for all the questions.
quote:
Originally posted by snapper
Next step would be to hone the bore, if the corrosion is not completely removed by the hone then you will need a rebore and new pistons
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ashg
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| posted on 25/10/12 at 06:03 PM |
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run one of these puppies up and down the cylinder. if it needs any more than that then get it rebored.
http://www.machinemart.co.uk/shop/product/details/cht259-3-legged-glaze-breaker?da=1&TC=SRC-cylinder
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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ashg
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| posted on 25/10/12 at 06:04 PM |
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hone the cylinder then gap the rings to see if they are too loose
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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