Hi Fred
This is a brilliant test, though I believe it has a draw back, won't the
same thing happen with a long duration camshaft, as they tend to have longer
valve overlap?
I ask this as you started me thinking, I have a 150 bhp TR5 cam in my PI
saloon and I get the suck back effect, but I also have a cylinder that only
reads 160 psi on the compression test, and although this doesn't seem too
low the rest read 200 psi, I never connected the two things before though I
was concerned about a burnt valve. Can you or any one else shed any light on
the cam duration aspect?
Graham.
2.5 PI MKII
Sprinted Dolomite
2000 MKI
Toledo
1300 Front Wheel Drive
http://www.triumph-iw.co.uk
----- Original Message -----
From: "Fred Thomas" <vafred@erols.com>
To: <triumphs@autox.team.net>
Sent: Tuesday, August 08, 2000 8:20 PM
Subject: burnt valve
>
> quickest way to check for burnt valves, start the car, and hold a dollar
> bill over the tail pipe, a burnt valve will suck the bill up against the
> tail pipe, takes 2 seconds to do this. "FT"
>
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