I always rev the engine a little when turning the key off, that has always
fixed it for me.
James Nazarian
'71 B roadster
'71 BGT ever so slowly turning into a V8
'63 Buick 215
"Aerodynamics are for people who cannot build engines"
Enzo Ferrari
On Tue, 25 Jul 2000, Charley & Peggy Robinson wrote:
>
> I'd like the list members who've had this phenom happen to them and
> how they cured it to tell us all about it. I can use the advice.
>
> I have a newly rebuilt engine (~ 2,000 miles) that's .030" over.
> It's a V block with ofset-cap rods and 4-ring dished AE pistons. The
> pre '68 head has .006" off of it to true it up. Stock profile cam and
> twin HS-4s. No pollution control equipment and no air leaks. 25D4
> dizzy with centrifugal advance mechanism that work and new vacuum unit,
> set in the middle of i's travel. Pertronics Ignitor and Lucas Sport
> coil. Stock exhaust manifold, new head pipe and free-flow exhaust
> system with all joints welded; no leaks. Running a 180 degree
> thermostat 'year round and the temp never gets much over the N mark no
> matter whether it's 100+ or 70 degrees outside, on the freeway at 70 mph
> or in stop-and-go city traffic. It idles smoothly at ~850 rpm but it
> diesels on shut-down, after it warms up, no matter what available octane
> fuel I run or where I set the timing between 10 to 14 degrees BTDC. The
> engine is running super, starts right up and gets good gas mileage.
>
> I can stop it (usually do) by selecting 3rd gear and engaging the
> clutch lightly simultaneous to shutting it off. Been doing the same
> thing to my Nissan PU for 75,00 miles, since I rebuilt it back in 1991
> and took the non-functional pollution devices off it. It's a PITA
> though.
>
> Maybe I need to fit a valve to open the intake manifold to the
> atmosphere when I shut it down. All suggestions welcome.
>
> TIA,
>
> CR
>
>
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