Question about 1994 Chevrolet S-10 Blazer

2 Answers

Engine swap I've just bought a 94 s-10 blazer with 4.3 vortec engine that has most probably a spun main bearing. In addition I have acquired a 4.3 with throttle body (carberated) engine, year unsure, to swap out with original. Is there much difference between the two? Looks like I will need to change intake manifolds but is there any other differences or changes that I need to know about? Not sure what year the good motor is for sure but it must be close to the 94 and most likely a little earlier. It has all the same part configuration and arrangement except the intake manifold/injection component. I do have the option of another engine which should bolt right up however I would need to pay a bit more in addition to removing it from vehicle. Which would be the best choice? Another option I suppose would be to remove the crankshaft from the bad engine and see if it can be turned. Not sure which way to go at this point.

Posted by on


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,118 Answers

Take the engine thats a direct swap and save your self a lot of head akes, even if it costs you a little more. Did you ever consider a jasper engine there a little pricey but you do get a good warenty and you can buy it either as a long block or short block, long block is with heads and short is with out heads. You can do as you want, but my advise would be to get a direct replacement. As far as crank regrind that could cost you more than the replacement if the rod that spun needs replaced as engine would have to come apart to do that, gasgets, parts, labor, regrind crank, bearings, ect.

Posted on Feb 21, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Chevrolet Master
  • 6,982 Answers

Forget the last option. Crank pins are really too thin for turning and will go "egg shaped" after a short time. Also, material from failure is likely all over the place inside oil galleys and passages Just asking for problems! I'd check with a junkyard to find out what fits what... by experience, they seem to know more than the dealers (it's their business!) Other than that, I'd go with the engine with the least miles and cleanest insides (no sludge buildups etc) Or the one that you actually saw running.(no smoke, knocks or excuses from owner) Sometimes a bit more work is worth the effort in the long run!!!
good luck

Posted on Feb 21, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 02 blazer i want to put a motor out of a 98 in it will it interchange

Chevy Blazer Engine Swap Part 1 of 2 - YouTube

? 10:29
Aug 13, 2011 - Uploaded by Dave R
Replacing the engine in a mid-size Chevy Blazer 4x4 with oneout of a Jeep Cherokee 2wd. Original engine was low and motoroil and spun a bearing. ... Chevy Blazer Intake Gaskets Replaced & Cooling System Rebuilt - Duration: 16:45. by ... 4:02. 94 4.3l Vortec V6 GM (black motor) - Duration: 6:01. by ...

4.3 vortec engine removal - YouTube

Jan 01, 2016 | Cars & Trucks

1 Answer

How to remove and replace main bearing on 2001 chrysler town and country 3.3L 6cyl

Main bearing replacement (there are four main bearings in your V6 engine) is MAJOR work. The engine must be removed from the vehicle and almost completely disassembled to get to the main bearings. If the bearings have 'spun' (likely), the engine will require machining to correct.
Unless you have a LOT of mechanical experience, this is not something a DIYer will be able to do. I'd strongly recommend getting a rebuilt engine and have it installed, if the van is worth keeping. It will probably be cheaper than having yours repaired.

Nov 01, 2015 | 2001 Chrysler Town & Country

2 Answers

What the torque specs. For a 2002chevys10 4.3vortex mains and rod bearing

Torque Specs Database

Type: Dim: Length: Head: Nut Grade: 20 Ft-Lbs 240 In-Lbs 27.12 N-m Connects: Connecting Rod To Engine Block Years: All Vote Record: Vote Note: Vortec - Rod Cap Nuts - 2 Steps: 20 FtLbs; +70degs

Main Bearing Cap Bolt 4.3L Step 1 15 ft lbs (20) Step 2 Additional 73 Degrees

i don't know if that's correct for main bearing caps since another link states it's much higher

4 3 Vortec Piston Specs eHow

hopefully a GM guy will chime in to confirm the main bearing torque

the rod bearing torques are the same on all the other links

Mar 25, 2015 | 2002 Chevrolet S-10

2 Answers

Our fuel pump stopped working on our 98 Chevy Blazer V6 4.3L Vortec Engine, so we bought a new one. A couple days later (before replacing the fuel pump) it started up and ran but ran crappy. So we did

what did you do (replace it) if you still have a miss you may need to tune it up / make sure the fuel pump you bought is for the right psi for your blazer

Mar 27, 2013 | 1998 Chevrolet Blazer

1 Answer

Just replaced 4.3 in a 1999 s-10 blazer, now I have no power in the vehicle at all. No headlights or anything. The starter will engage when crossed with a screw driver! Battery started another vehicle just...

If it was a direct replacement engine...4.3 for a 4.3 , recheck all electrical connections. make sure all cables are attached to the battery( sometime there are smaller cables in addition to the main cables), check frame and engine ground cables, all fuses, all alternator connections and main connector to fire wall if you had it removed. you probably just overlooked one connection in the haste to get her running.
If this was not an exact engine type swap well that book isn't available. custom swaps run into custom problems!
p.s. don't take your buddies word " yea man i hooked it up right". You recheck it
Good luck

Aug 24, 2011 | 1999 Chevrolet Blazer

2 Answers

Oil presure gauge went to zero and computer said low oil presure! I then heard a loud knocking coming from engine! I check level of engine oil and its full, what do you think it is?

You didn't state the mileage (would help with diagnosis) But unfortunately you have suffered major engine damage. And that would depend if the knocking you hear is steady at engine idle or only knocks when reving the engine . For some reason the oil pressure did fall to zero, most likely due to bearing wear but again depends on mileage. If knocks constant at idle it is a spun main bearing, if knocks only while reving engine it is a spun connecting rod bearing. Either require an engine overhaul. Or engine swap, Once again it depends on how many miles you have the engine to determine if its wise to rebuild it or replace it. I hope this answers your Q.....

Jul 28, 2011 | 2003 GMC Sierra 1500

1 Answer

Oil pressure guage drops off to nothing after vehicles runs for awhile 1999 chevy blazer 4.3 vortec engine

get it inspected. you may have engine sludge, or a failed oil pump, or a bad gauge or sender, or possible a failed engine. The main bearings on the crankshaft could be warn out causing this. Do not drive with no oil pressure or the engine will surely fail if it hasn't already.

Aug 10, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

89-98 chevy blazer

It's not worth doing all that conversion, buy the time you spend the time and money to convert the 89 4.3 to work on the 98 blazer, it would be cheaper to install a 98 vortec rebuild. The 89 4.3 have a TBI fuel injection system and the ecm on the 98 will not work and the bad news is that the ecm on the 98 also controls the transmission shift points and the 89 will not, so even if you swap the ecm to have the 89 4.3 engine work. the transmission will not shift. Sorry for the bad news but it would be cheaper to replace the 98 engine with the years of 1996 to 2001. Good luck and hope this helps. 

Jul 21, 2009 | 1989 Chevrolet S-10 Blazer

4 Answers

Engine wont start without priming with gas first, then runs well

i have the same problem on a 98 jimmy 4.3 4x4.
i replaced the fule pump and have good pressure.
new wiers & coil (good spark) no MIL & no codes.
will only start when primed. it will run & drive all day
with no problems.
but once it has been turned off (warm or cold) i will
have to prime it once again to start it.
i have another engine that was in it before it spun a bearing.
it ran fine so i know all parts are good.
i swaped the mass air flow and throttle body but i still have
to prime it everytime to start it. am i forgetting something?
should i swap out the intake with the injectors?
any help would be sweet. thanks.

Apr 28, 2009 | 2000 Chevrolet Blazer

2 Answers

Engine swap

95-94-93 4.3 vortec are compatable engines. 97 4.3 will fit but will have problems with sensors and computer

Dec 06, 2008 | 1995 Chevrolet Blazer

Not finding what you are looking for?
1994 Chevrolet S-10 Blazer Logo

166 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides