Re: engine resonance/noise

[The Murphy-Fahlgren Family <efhome@master.adams.com>]

Colin Barfoot wrote:
> If I let off the accelerator the engine quites down.  It can't be exhaust
> sincethe engine is quite underload at other engine speeds (and my 86 doesn't
> even have the rear muffler- just a 3" SS pipe).

Colin,

My guess is a cracked exhaust manifold and/or missing/broken EM studs.

> I'm concerned that this plus the high oil consumption 1L in 2000 -2500 km
> (1200-1500miles) (as measured by the last few top-ups) is pointing towards
> serious engine problems in my future.

Do you see smoke ever?  Just at start up could be overspun turbo.
A puff as you let off the throttle is usually bad valve seals.  Oil
on the driveway is usually crank seals IME.

Eric Fahlgren
-- 
The Murphy-Fahlgren Family            Try to take over the world.
efhome@adams.com                                  Canton, MI, USA