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Re: Diagnosis ?

To: Guy <Guy@weller-lakes.freeserve.co.uk>
Subject: Re: Diagnosis ?
From: Chris Kotting <ckotting@iwaynet.net>
Date: Tue, 25 May 1999 07:19:46 -0400
Cc: Spridgets <spridgets@autox.team.net>
References: <003f01bea61e$fff79d40$6926883e@default>
Reply-to: Chris Kotting <ckotting@iwaynet.net>
Sender: owner-spridgets@autox.team.net
You can put about a tablespoon of oil in #3 and see if the compression
goes up.  If so, it's probably a burnt valve (the oil helps the rings
seal).  The leakdown test is conclusive though.  

Chris Kotting
ckotting@iwaynet.net

Guy wrote:
> 
> 1978, 1500 Midget. Blown head gasket last week. (between #3 and#4, not
> leaking into either water jacket or oil ways)
> Drove home 4 miles on 2 cylinders, with 2 "lazy" cylinders, firing but no
> power.
> Replaced gasket, torqued and then adjusted valves.
> Re torqued and adjusted again after 200 miles.
> 
> Its making a distinct tapping noise when pulling in mid range revs. under
> load.
> Sounds metalic, but could just possibly be a very sharp "tchuff, tchuff,
> tchuff" noise.
> Compression tests (wet) at 185, 175, 155, 180
> 
> I have checked the valve clearances again (cold) and still they seem right.
> Do I have a burnt valve on #3 ???
> 
> Guy

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