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post #1 of (permalink) Old 02-13-2006, 09:31 PM Thread Starter
 
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dimensions of a 3.8/4.3 engine

Hi guys - I mostly hang out on the full size board, but figure this is the most likely forum for the info I'm looking for. ( tried search, and it didnt help)

I'm considering a chev V6 + propane swap into the rover in my avatar, but havent been able to find a straight answer on the sizes of the GM V6's. the 2 motors I'm considering are the 3.3 60* motor, and the 3.8 90* motor. The critical dimension is the overal length from the back of the block, to the front of the water pump snout. Can anyone on here help me out with accurate numbers, and possible insight into 'short' setups ( or which variants were possibly shorter from the factory.)

FWD vs RWD isnt a big issue: its not going into an existing driveline, so I'll be picking a tranny to match the bellhousing pattern.

thanks
chris
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post #2 of (permalink) Old 02-14-2006, 05:55 PM
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Re: dimensions of a 3.8/4.3 engine

i've got a 3.4 sitting in my shop. it was removed from a 96 camaro. that is the 60 degree motor. if i get a chance to dig it out, i'll see what i can find out for you.
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post #3 of (permalink) Old 02-14-2006, 07:13 PM Thread Starter
 
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Re: dimensions of a 3.8/4.3 engine

If you could, I'd appreciate it MM. not sure if the block is the same - I seem to recall reading on a site somewhere that they re-worked the block for the 3.4 - but its just as realistic of a swap if it'll fit.

c.
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post #4 of (permalink) Old 02-14-2006, 07:58 PM
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Re: dimensions of a 3.8/4.3 engine

I think the blocks are different, but close. I've seen a 2.8 and 3.4 side by side. There are differences, but size wise the blocks/heads are the same. The differences come in the timing cover and were some senders are located.

I'll include a picture of a 3.4 next to a 350. That will give you an idea of size. If i get a free second I'll try and take a few pics and measurements and post them here. Might not be for a few days. I got to dig the motor out from a pile of other motor parts.

Last edited by MouseMotor; 02-18-2009 at 05:39 PM.
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post #5 of (permalink) Old 02-14-2006, 10:07 PM Thread Starter
 
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Re: dimensions of a 3.8/4.3 engine

thanks for the info so far - looking at that photo ( and measuring the SB in my c30), I'd hazard a guess that the 3.4 is 21-22" from the back of the block, to the front of the pulley?

c.
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post #6 of (permalink) Old 02-15-2006, 09:32 PM
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Re: dimensions of a 3.8/4.3 engine

that sounds right. tomorrow i'll try and get a tape on the motor. as you can see in the pic, i got it down to the long block.

the water pumps are not too big, maybe 3 or 4 inches off the front of the motor.

the motor itself is real narrow. that motor is going into a Cherokee, or at least that is why the motor was purchased about 3 years ago. that project hit the back burner, and may never come about. but it will fit a Cherokee, if that helps with the sizing.
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post #7 of (permalink) Old 02-16-2006, 05:44 PM
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Re: dimensions of a 3.8/4.3 engine

alright, got some measurements for you. this is off a camaro motor, 3.4L

from the bottom of the oil pan to the top of the valve cover is about 24 inches.

from head to head, without exhaust manifolds, is 17 inches

from the timing chain to the fly wheel is about 19 and 1/2 inches

the widest section of the rear of the block where the bell housing bolts is about 16 inches.

hope that helps, if you need more measurements shoot me a PM.
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post #8 of (permalink) Old 02-16-2006, 09:27 PM Thread Starter
 
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Re: dimensions of a 3.8/4.3 engine

MM - thanks for the dimensions. 'ballpark' is close enough for now.

at 19.5" + a few more for the water pump, the V6 wont save me any space over the 2.4 TD I'm currently running - gonna have to decide if its worth the quiet operation, available rpms, and smoothness gains of running a propane v6 vs easy fuel, not losing power at altitude, and range of the diesel.

decisions decisions decisions

thanks again
chris
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post #9 of (permalink) Old 02-17-2006, 05:57 PM
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Re: dimensions of a 3.8/4.3 engine

any time.

if you need any more info, PM me. I'll prob not be installing this motor into the jeep it is going into for a while.
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