You have lots of options at this point. There is the option of swapping in
a 3.1 or 3.4 motor (my understanding is that the 3.1 is virtually plug and
play). If you move to something else, you also have to change the
transmission. 4.3 = new transmission If you are going the extra distance
to do the 4.3, you can put a 350 small block in with not much more effort.
No modification to engine well needed for either 4.3 or 350. 350 and 4.3
will also require new hoses and radiator, as if my memory serves me correct,
the hook-ups are on the opposite sides. New shocks for sure up front with a
350, though with the motor out it's a piece of cake to change them. Explore
your options at http://www.s-seriesforum.com/forum/ and
http://forums.s-series.org/ Both are outstanding resources for anything
related to the S-series. If you are thinking about anything, 99% likelyhood
somebody on one of those two forums has done it and can tell you all the
tricks and what to avoid.
I would suggest that you look for a late 88 or 89. As they have the 4.3
which is a better engine than the 2.8. With the 4 wheel drive the truck is
so heavy that the 2.8 is way underpowered. The 4.3 is also a 4 bolt main
engine. I have an 88 with almost 250,000 miles on it and its still going.
I bought a 1987 S10 Blazer with a 2.8L V6 for my daughter when she was
in college (43,000+ miles on it). It now has 210,000+ miles on it and
the engine is going strong. The only major repair was a tranny overhaul
at about 190,000 miles because my SIL messed with it and screwed it up.
This vehicle does not get babied by any means and is regularly driven on
long (over1000 miles) trips up and down the East coast. The only
regular care this vehicle gets is oil and filter changes (and chassis
lubes). I think it depends on the owner (or someone like me to make
sure it gets serviced when it needs it). I've seen quite a few of these
same vehicles with the 2.8L go for many more miles than people
I would rather be exposed to the inconveninces attending too much
liberty than to those attending too small a degree of it.
~ Thomas Jefferson ~
I had a 86 S-10 with a 2.8l that was just rebuild and i put over 75000 miles
my rear main seal started to leek after i played with the tranny they sell a
repair sleave that i put on with a new seal and never had a problem again
that's still runs great and rebuilt about 50,000 miles ago. The only
problems I had was everything hooked to the 2.8 gave me problems, i.e.
carb., dist., fuel pump, etc. If you live near Frederick Maryland, it's
yours if you want it. Still runs great and I will not go back to a 2.8 after
driving the 4.3. All you have to do is put your oil pan on it for it to go
Well, as I understand it, it's not so much the motor that's the problem...
from what I've been told, they didn't do that bad in the 2WD S10 Blazers,
but the added weight of the 4WD is just too much for the little things...
Oh, I'm not arguing that they're good trucks, I know they are, that's why I
I'm just relaying what I've been told about the engines on them... the more
I hear, the more it seems like some of them had no problems at all, while
others had nothing but problems... I don't yet know which mine is going to
turn out to be, other than knowing it's in right now getting a new rear main
seal. I'm just planning on swapping out the 2.8L for a 3.4L as a project,
and because I want a little extra power :)
Now the only thing I have to decide is whether I want to go from 2.8L carb
to 3.4L carb, or convert to some flavor of fuel injection...
I'd say that depends on how deep your pockets are. IMHO, on my truck
at least, the carb was the weak spot. The ol' lady's '89 Blazer was a
TBI, and it got better mileage than my carbed pickup even though it
'82 FLTC 92" Shovel 'Pearl'
TOMKAT, SENS, BS#133, DOF#51, MAMBM
ASE Certified Master Auto Tech + L1
Chevy Certified Master Tech
Drove my 1986 for 150K hard miles with tons of light off road use bird
hunting and only had normal repair items required on it... sold it for Chevy
Astro and put 180K on that V6. Keep the truck but do the maintenance.
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