4.3 chevy v6 ?s

Stakebed · April 19, 2010, 08:02:55 PM

I have a 4.3 motor from a 93 s10 that I want to put in my model A. I would like to run a turbo 350. I don't know if the 4.3 needs a flexplate with a balancing weight or not.

The second question is the oil filter setup. The one I have has a remote filter (4wd ). I would like to go with the filter on the block. Is the filter adapter from a v8 interchangable, and if not would the only source be a dealer for new? Thanks, Jim

Flipper · April 19, 2010, 08:30:58 PM

I wouldn't run a 4.3 simply because of the exhaust note.

Fat Cat · April 19, 2010, 08:38:41 PM

Quote from: "Flipper"I wouldn't run a 4.3 simply because of the exhaust note.

Some of us like the sound of a V-6 exhaust. Which is why I have a 3.0L Ford V-6 to go in my Model A.

enjenjo · April 19, 2010, 10:01:05 PM

Quote from: "Stakebed"I have a 4.3 motor from a 93 s10 that I want to put in my model A. I would like to run a turbo 350. I don't know if the 4.3 needs a flexplate with a balancing weight or not.

The second question is the oil filter setup. The one I have has a remote filter (4wd ). I would like to go with the filter on the block. Is the filter adapter from a v8 interchangable, and if not would the only source be a dealer for new? Thanks, Jim

There is no balance weight on a 4.3 flexplate. And the V8 oil filter base fits on a 4.3.

Stakebed · April 19, 2010, 10:03:19 PM

Thanks Enjenjo!

Crosley.In.AZ · April 19, 2010, 10:04:47 PM

my 1988 v-6 4.3 oil filter was only the threaded stud that threads into the block. Filter spins on and fits the block. I had removed the remote filter adapter.

There is a weight on my 4.3 flexplate for my 1988 engine

enjenjo · April 19, 2010, 11:29:00 PM

Quote from: "Crosley"my 1988 v-6 4.3 oil filter was only the threaded stud that threads into the block. Filter spins on and fits the block. I had removed the remote filter adapter.

There is a weight on my 4.3 flexplate for my 1988 engine

I may stand corrected on the flex plate. Both of the ones I have here have no weights, but they are both early 4.3, 1985 models.

GPster · April 20, 2010, 08:22:41 AM

Quote from: "enjenjo"
Quote from: "Crosley"my 1988 v-6 4.3 oil filter was only the threaded stud that threads into the block. Filter spins on and fits the block. I had removed the remote filter adapter.

There is a weight on my 4.3 flexplate for my 1988 engine

I may stand corrected on the flex plate. Both of the ones I have here have no weights, but they are both early 4.3, 1985 models.

My '85 4.3 V6 doesnt have a weight on the flexplate either. Maybe the difference lies in the change in the bellhousing side of the block . '85 to '87 the 4.3 was a 350 less two cylinders. After that the 4.3 was used as a FWD engine and the back of the block was made to fit the FWD transmissions. They might also have been changed to the 1 oiece rear main seal. I have also read that the later engines might be drilled for starter mounting on either side. It looks to me like the newer 4.3 was put in the S10s as an after-thought for something bigger than the 60 degree V6s that they were using. There's also a lot of changes in the early and late 2.5 fours in the '80s. They're hard to follow because that engine went to other manufacturers. The 4.3 and the 2.5 are simple numbers but I guess you need to know what year it is and what it came out of. GPster

tomslik · April 20, 2010, 08:55:49 AM

i believe the 85 was a rope/2 peice rear main seal and the wieght was built into the end of the crank.
86-up were 1 piece seals and need wieght on the flywheel..

Bruce Dorsi · April 20, 2010, 01:08:50 PM

According to GM:

Tomslik is correct !

GPster · April 20, 2010, 01:31:59 PM

So I guess that Frank and I have the odd-balls of the lot Mine is a fresh .030" over and has been up against my 350 turbo. Maybe we can put them together and make a V18 for the Crosley but I don't know if the frame will be long enough. GPster

57larry · April 20, 2010, 05:22:50 PM

I had a 4.3 V6 with a turbo 350 behind it with headers in my 29 sedan. it would smoke the tires. I drove this sedan from Indy to LA and back with air. plenty of power

Stakebed · April 20, 2010, 08:32:47 PM

Thanks to all for the info. Just out of curiosity do the newer 5.7 motors with 1 piece rear seal also use a weighted flywheel? When I was searching for this info I found a listing on a parts store site that had a 93 4.3 and an older in the eightys 5.7 listed as applications it fit. I thought the small picture looked like it was weighted, but only being familiar with the older engines (2 piece main seal) I didn't think a 350ci chevy ran a balance weight. Jim

tomslik · April 21, 2010, 05:01:44 AM

Quote from: "Stakebed"Thanks to all for the info. Just out of curiosity do the newer 5.7 motors with 1 piece rear seal also use a weighted flywheel? When I was searching for this info I found a listing on a parts store site that had a 93 4.3 and an older in the eightys 5.7 listed as applications it fit. I thought the small picture looked like it was weighted, but only being familiar with the older engines (2 piece main seal) I didn't think a 350ci chevy ran a balance weight. Jim

yep, they got weights too...

alchevy · April 21, 2010, 12:28:59 PM

I will be using a 4.3 V6 in my '48 Chevy Truck because it was given to me to use in the truck.
We got the truck running with the inline 6 216 that came with it. Drained the old gas out that had been sitting in the tank for 2 years since it last was driven. It was cranked 6 months before I got it. Cleaned up the carburetor and once it got some fresh gas in the tank, it fired right up. My wife has been enjoying driving the truck. I have a t350 transmission that I need to get rebuilt to go behind the V6, wiring harness, driveshaft, rearend, tires & wheels, and be cruising. The stock gauges don't work so we have been using the GPS to tell how fast we are going. Got it up to 55 downhill with the 3 on tha tree that's in it right now.
The bias-ply tires ride very weird. Going to swap them out for some radials soon.
AL