[Healeys] 4 Cylinder Woes, cont'd.

Kees Oudesluijs coudesluijs at chello.nl
Tue Aug 27 12:31:09 MDT 2019


If it is a burnt valve it is not wise to travel any long distance as you 
may damage the valve seat considerably if it has non hardened seat 
fitted and, as David Nock says a cracked head may be the result. It is 
unlikely to be rings/bore as the drop in compression is to big.

What also could be checked easily is if the crank case ventilation blows 
considerably , if so it could be a hole in the piston but than again the 
compression would probably be lower than 25psi and a holed piston is not 
something that happens often.

Burnt valves on UK cars are a regular occurrence. I have had them on the 
Spitfire, Land Rover and on the Jensen-Healey, never on the Italian, 
French, USA, German, Japanese or Korean cars I had/have but may be I was 
lucky there.


Kees Oudesluijs



Op 27-8-2019 om 20:08 schreef David Nock:
> Steve, are you planning on driving the Healey to Deadwood.  If so I 
> would not recommend to do that with a low compression. If it is a 
> burnt valve then you will greatly increase the chances of cracking the 
> head. If it is rings then you will use a lot of oil.
> I would recommend a leak test right away. Then you can determine if 
> the low compression is a valve problem or a ring problem.
> David Nock
> healeydoc at sbcglobal.net
> 209 948 8767
> www.britishcarspecialists.com
>
> Help us have our Founder Norman Nock inducteed into the
> British Sportscar Hall of Fame, You can vote for your favorites
> by visiting the site at.
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> *From:* jim via Healeys <mailto:healeys at autox.team.net>
> *Sent:* Tuesday, August 27, 2019 9:57 AM
> *To:* healeys at autox.team.net <mailto:healeys at autox.team.net> ; Steven 
> Kingsbury <mailto:airtightproductions at icloud.com>
> *Subject:* Re: [Healeys] 4 Cylinder Woes, cont'd.
> So ...Have you done a "leak-down test" to confirm where 
> (intake/exhaust/rings) the bad one is bad?
> Jim
> On Tuesday, August 27, 2019, 3:02:14 AM UTC, Steven Kingsbury via 
> Healeys <healeys at autox.team.net> wrote:
> Cylinder #1   150 lbs
> Cylinder #2    25 lbs
> Cylinder #3   155lbs
> Cylinder #4   150 lbs
> Steven Kingsbury
> BN1 kind of
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