Classic cars forum & vehicle restoration.
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Traumjaegercat
Joined: 09 Nov 2020 Posts: 18
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Posted: Wed Nov 11, 2020 8:27 am Post subject: smoking Humber Imperial |
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Hi all,
Please can anyone help me with my smoking Humber?
I have been restoring a 1965 Humber Imperial which has been an absolute pig at every turn but I am finally getting there (I Think) The engine now starts fine but gives out a lot of smoke from the breather Has anybody got any ideas on this and possible solutions. Now I am getting on a bit and find it difficult to carry out large jobs like taking the engine out. but I hope it will not come to that.
All help will be much appreciated
Thanks in anticipation
T |
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mikeC
Joined: 31 Jul 2009 Posts: 1774 Location: Market Warsop, Nottinghamshire
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Posted: Wed Nov 11, 2020 9:28 am Post subject: |
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That's the classic symptom for worn piston rings, but perhaps, if the engine has been standing for some years, it could be that the rings are just gummed-up. More running may cure the problem, especially if you can source a supply of upper-cylinder lubricant like Redex to ease the process. _________________ in the garage: 1938 Talbot Ten Airline
Recently departed: 1953 Lancia Appia, 1931 Austin Seven, 1967 Singer Chamois, 1914 Saxon, 1930 Morris Cowley, 1936 BSA Scout, 1958 Lancia Appia coupe, 1922 Star 11.9 ... the list goes on! |
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Traumjaegercat
Joined: 09 Nov 2020 Posts: 18
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Posted: Wed Nov 11, 2020 12:00 pm Post subject: |
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Thanks for the reply Mike I will try to get some Redex first |
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Clactonguy
Joined: 20 Mar 2018 Posts: 104 Location: clacton on sea
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Posted: Sat Feb 27, 2021 6:20 pm Post subject: smoke |
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common with old engines and worn piston rings or issues with PVC valve! check valve and breather pipes are clear and working first. then we might want a compression test both wet and dry. compare significant differences between wet and dry ( more than say 30 psi) point to worn rings.bear in mind valves may not be 100% sealing though . even worn valve seals will allow oil to be drawn into cylinders and burnt increasing pollution but mainly not easily visible ( old Ford engines had this a lot eg Pinto units where seals hardened with time .heat /oil ) |
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Brent29
Joined: 07 Jun 2018 Posts: 57
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Posted: Mon May 10, 2021 1:15 am Post subject: |
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mikeC wrote: | That's the classic symptom for worn piston rings, but perhaps, if the engine has been standing for some years, it could be that the rings are just gummed-up. More running may cure the problem, especially if you can source a supply of upper-cylinder lubricant like Redex to ease the process. |
Gonna try Redex as well for the incoming Imperial project. It has been sitting for at least 5 years. Need to finish installing the brake kit and bilstein shocks on the Silverado this week before we can clear the garage and take the Imperial in. |
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