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Posted by Grant in CO [64.234.252.6] on Thursday, December 23, 2010 at 00:24:45 :
In Reply to: OT Jeep V6 posted by Dayle [64.12.116.76] on Wednesday, December 22, 2010 at 20:07:31 :
Some info I have. There are 4bbl manifolds, cams, etc. and full length headers available.
There is also the odd fire (Jeep) and even fire. The odd fire is due to the firing order remaining the same after loping off 2 cylinders from the V8. Actually makes a nice loping sound. Later versions changed the firing order.
Gar
Jeep Engine: Dauntless Buick 225 V6
The "Dauntless" 225 V6 engine was introduced
in 1966 in the CJ and C101 models. The V6
configuration of the engine makes it very
compact which is a big plus in tight Jeep
engine compartments. Kaiser purchased the
tooling to build the 225 from Buick and
later, AMC sold the tooling back to Buick.
A desendent of this engine, the 231 (3.8L)
V6, is used in GM cars to this day. The
modernized and common 231 is a good canidate
for replacing a blown 225. There are
differences in the balancing of the engine
though, so it can be tricky. The 225 is
externally balanced and the 231 is internally
balanced. This means you cannot just throw
your 225 fly wheel on a 231, the 231 must be
balanced.
The flywheel itself used with the 225 is not
typical. The flywheels used in the Jeep
vehicles are very thick and heavy to increase
torque. The flywheels used in Buick cars are
much lighter.
Since the 225 is a Buick engine, it uses the
standard Buick bell housing. The standard
Buick bell housing will bolt to a SM420, so
this is probably the best transmission swap
option for Jeeps equipped with this engine.
The T-14 and T-86 3 speed transmissions used
behind this engine are not known for their
strength.
The Buick 225 uses a cast iron block and
cylinder heads with mechanical lifters and 3
main bearings.
Dauntless Buick 225 V6
Bore x Stroke 3.75" x 3.40"
Displacement 225 (3.68L)
Compression Ratio 9.0:1
Horsepower (net) 160@4200
Torque (net) 235@2400
Main Bearings 3
Valve Configuration OHV
Fuel 2bbl
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