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Smoking Engine
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nzrover



Joined: 29 Mar 2018
Posts: 3

PostPosted: Fri Mar 30, 2018 9:02 pm    Post subject: Smoking Engine Reply with quote

Hi Folks, I wonder if I can get a bit of advice. I have a Rover P4 6 cylinder that has been in dry storage for 24 years that I am trying to restore. When I started the engine a HUGE amount of white smoke came out the exhaust I am talking about thick unable to see through. I have tried a new head on and disconnected the brake servo with no luck. When I had the head off I looked at the pistons and they looked OK. The car has reasonable compression except number 1 piston but I noticed the exhaust valve had a small crack which maybe the reason for that. Any suggestions would be helpful.
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Clactonguy



Joined: 20 Mar 2018
Posts: 104
Location: clacton on sea

PostPosted: Fri Mar 30, 2018 9:45 pm    Post subject: smoke Reply with quote

white is normally steam .eg water in cylinder bores. we can pose question on rover forums .theres several clubs supporting rovers and many. old classic car forums or sites such at petrol heads .
if a rover p4 owner has had same issue we can often save a lot of time and get a fix in place.
was head gasket OK? though form description of such heavy smoke I would think its not coolant issue but more likely something such as brake fluid or power steering sort of oil. as when these burn they do give of heavy clouds of smoke.
well done. doing a compression test. hope rebuild pans out well . Laughing
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jp928



Joined: 07 Jun 2016
Posts: 249
Location: Australia

PostPosted: Sat Mar 31, 2018 3:56 am    Post subject: Reply with quote

No power steering on a P4, so my guess would be water or brake fluid. Brake fluid should be easy to differentiate, as it will all be gone soon, and as the exhaust heats up the water should become less visible, as it will be water vapour. A burnt exhaust valve should just show as a misfire, and lack of power, shouldnt produce an amount of smoke. I hope you oiled the cylinders well before running it after sitting for that long! what year and model is it?
I bought a P4 cheaply once, with a misfire, betting it was just a fouled plug...which it was. Smile
jp 26 Rover 9
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alastairq



Joined: 14 Oct 2016
Posts: 1950
Location: East Yorkshire

PostPosted: Sat Mar 31, 2018 12:53 pm    Post subject: Reply with quote

Does it have a brake servo?
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ukdave2002



Joined: 23 Nov 2007
Posts: 4100
Location: South Cheshire

PostPosted: Sat Mar 31, 2018 4:17 pm    Post subject: Reply with quote

A vacuum and leak down test would cut out the guesswork.

Dave
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Phil Lincoln



Joined: 18 Oct 2009
Posts: 26
Location: LINCOLN

PostPosted: Sun Apr 01, 2018 11:06 am    Post subject: Smokey engine Reply with quote

Having owned a P4 95 for twelve years , I always found answers on the P4 Drivers Guild web site . Some very knowledgeable people on there.
roverp4dg.org.uk should do it .
Regards to all , Phil .
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