[Shop-talk] Mercruiser 4.3

[Paul Mele]

thanks for the note on this engine series;
I just now realized that I inherited one of these in an incomplete "S-10
drivetrain into a 1950 Jeepster" project; I"ll be studying more about it/
them at some point in the futre (about 4 car projects down the line...)

PM

-----Original Message-----
From: shop-talk-bounces+paul.mele=usermail.com at autox.team.net
[mailto:shop-talk-bounces+paul.mele=usermail.com at autox.team.net] On Behalf
Of old dirtbeard
Sent: Saturday, September 06, 2008 10:22 PM
To: shop-talk at autox.team.net
Subject: Re: [Shop-talk] Mercruiser 4.3

Dear Mark,

Is that the GM 4.3 V6 engine in marine mode?

I have an '03 GMC Savana cargo van with the 4.3L V6, and I think it is the 
best truck engine ever. It develops 260 ft/lbs of torque at 2,800 RPM and 
gets 20+ MPG on the highway. It is a torquey stump puller that sips gas. It 
just about the best engine I have owned.

It probably is one of GM's oldest engines, too, as it is a 90-degree V-6 
developed in the mid-1980s by removing two cylinders from GM 's small block 
V-8. A counter-rotating balance shaft was employed to balance primary crank 
vibration. They have made millions of them and have it worked out all the 
small stuff over the last 20+ years. It feels like a V8 off the line and 
drinks gas like a V6 at speed.

best,

doug