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  #1  
Old 02-01-2020, 09:23 PM
Robin8er Robin8er is offline
 
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Default Corrosion on chrome cylinders

Has anyone seen corrosion on chrome cylinders? I have a 320 I got as part of a deal. Engine has been sitting in a humid environment. I looked inside the spark plug hole and it looks like the chrome is separating from the cylinder wall. It looks like a spider web inside. Distinctly different from cross hatching.

Are these cylinders junk or is there any hope of saving them?
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  #2  
Old 02-01-2020, 11:19 PM
lr172 lr172 is offline
 
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Quote:
Originally Posted by Robin8er View Post
Has anyone seen corrosion on chrome cylinders? I have a 320 I got as part of a deal. Engine has been sitting in a humid environment. I looked inside the spark plug hole and it looks like the chrome is separating from the cylinder wall. It looks like a spider web inside. Distinctly different from cross hatching.

Are these cylinders junk or is there any hope of saving them?
Don't know much about chrome cylinders, but if the environment was harsh enough and exposed long enough to make the chrome separate (not easy to make chrome separate from base metal), I believe that you need to pull that engine apart and check everything. It may not be the full extent of corrossion issues.

Don't know about the spider cracks though I suspect that is enough to red flag them. If the chrome has separated from the steel, they are definately no good. Though they can be overhauled and re-chromed I believe. Not sure that is much of a savings over new these days.

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Last edited by lr172 : 02-01-2020 at 11:26 PM.
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  #3  
Old 02-02-2020, 04:23 AM
flysrv10 flysrv10 is online now
 
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Chrome cylinders have the spice web crack s in the finish, in lieu of cross hatch.
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Old 02-02-2020, 05:51 AM
sailvi767 sailvi767 is offline
 
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I donít know if itís correct but a well known engine shop told me chrome cylinders manufactured before 2000 provide outstanding service. Problems began around 2000 where new EPA requirements required changes in the chroming process and the cylinders have more issues.
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Old 02-02-2020, 07:24 AM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by Robin8er View Post
It looks like a spider web inside. Distinctly different from cross hatching.
That is how a chrome cylinder looks.
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Old 02-02-2020, 07:56 AM
Robin8er Robin8er is offline
 
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Thanks for the replys. I'll still pulla jug and have a look. Glad to know that's what chrome cylinders look like. The piston is perfect. Not that that means much. (Engine hasnt been run since it was built).
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Old 02-02-2020, 08:23 AM
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DanH DanH is offline
 
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Quote:
Originally Posted by Robin8er View Post
Thanks for the replys. I'll still pulla jug and have a look. Glad to know that's what chrome cylinders look like. The piston is perfect. Not that that means much. (Engine hasnt been run since it was built).
Good move, as the cam and tappets are probably more of a concern.
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