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#26 |
Just here to tinker
![]() Join Date: Jun 2008
Location: Holland, MI
Posts: 3,672
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Re: 4.3 v6 ????
I had a TBI version of the 4.3 in my 1991 G van. It got a solid 15 mpg all day long. Maybe I could get 17 if I behaved, but rarely. It pulled my 1500 lb camper ok. Didn't like hills, but would pull the camper at 65 all day. It is not a powerhouse nor a fuel miser. But a good engine. One thing to consider is their inherent vibration issues. It can be annoying at stop lights if you live in the city.
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78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725 |
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#27 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,910
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Re: 4.3 v6 ????
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#28 |
Registered User
Join Date: Jan 2013
Location: Calgary Alberta
Posts: 1,164
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Re: 4.3 v6 ????
Some will go a lot of miles. My brother in law gave a still running P/U to his daughter and that one had close to 500k kms (300k mi) on it.
The 89 Astro van that I bought new and eventually replaced the head gasket on still leaked afterwards. My 90 Astro van with the leaking coolant came to me when it was almost new and I managed to coax almost 400k kms out of it by using an annual or more can of bars leak. Once, when the fan came off the water pump hub and went through the rad, I was surprised that it wasn't all plugged up inside. Has no else had this left rear cylinder leak Problem?
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66 fleetside 350 4sp |
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#29 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,910
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Re: 4.3 v6 ????
The 4.3/NV3500/3.42's in this truck ran fine all the way to about 250k. It had plenty of power for the DD job until the end (something failed in the valvetrain coming home from GoodGuys Spring show of '21).
It's getting a re-freshed Gen IV 5.3 w/a Stage 2 truck cam & 4l60e w/a V6 converter. In hindsight, he wishes he would have just rebuilt the 4.3 because it's still not complete. It's hard to quickly get things nicely done when working part-time/nights on a shoe-string budget....
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#30 |
Registered User
Join Date: Dec 2010
Location: konawa ok/oakdale Ca.
Posts: 1,647
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Re: 4.3 v6 ????
There was build thread on here a few years ago were someone swapped a 60-66 cab on to an S10 floor pan with a 4 cylinder.
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#31 |
Registered User
Join Date: Mar 2008
Location: nampa, idaho
Posts: 332
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Re: 4.3 v6 ????
Coolant leaks usually come from the intake manifold. I have had to do a couple of them before. I think the manifold had a tendency to warp over time, that or the intake gasket would fail. Not the easiest to get to in a van, but solved the problem for me both times.
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#32 | |
Registered User
Join Date: Feb 2013
Location: central California
Posts: 2,726
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Re: 4.3 v6 ????
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#33 |
Registered User
Join Date: Jul 2010
Location: Bancroft, ontario
Posts: 550
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Re: 4.3 v6 ????
I too have had a few 4.3 engines and put 460km on one and was still running when i got rid of it!they are good engines but not without coolant issues and they are not great on fuel! I would personally hunt down a 4.8 l20 small v8. Simple drop in and also will get the same fuel mileage as the v6. Nice thing about 4.8 it doesn’t have that afm garbage! Just my opinion!
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