Question about 1991 Chevrolet S-10 Blazer

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Vacuum line diagram

I Had to redo all top end seals and replace a cracked head.... I was not present when "disassembly" started. I have no idea what was taken off or replaced (or lost)... and I am trying to figure out where (2) vacuum hoses are supposed to go. From the looks of things, they either start or finish near the ****** housing (or atleast that is as far as I can trace them without dropping the ****** or exhaust). It's a 1990 Chevy S-10 Blazer, 4x4, 4.3 L, V6, "TBI Vin-Z". Any kind of info or assistance would really help me out a lot. Thank you.

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I found this for 91.
vacuum line diagram - vacuum-q31w4wolaoqrlfayhzuvwer5-2-0.jpg

Posted on Apr 26, 2017


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6ya staff

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Posted on Jan 02, 2017



  • 19 Answers

SOURCE: 1990 chevy camaro with a rebuilt 350 Tbi

fuel pressure isnt right.. need to get a fuel pressure regulator so you can regulate the gas flow..

Posted on Apr 21, 2009

michigan man

edgar walker

  • 3533 Answers

SOURCE: need picture diagram of vacuum hoses for 1987 chevy s-10 blazer

try this website to see if they have your car listed its if you are not able to get it try your local library or local chevrolet dealership in the parts department

Posted on Apr 27, 2009


  • 5 Answers

SOURCE: I need to find out what colors go to what post onto the starter

most of the time all big hole wires go to the big post whitch would be battery an hot leads.the smaller wire sould go to the s post closer to the block. s stands for start.. GOOD LUCK

Posted on Jun 25, 2009


  • 366 Answers

SOURCE: is an 86 transmission from a 2.8L the same as a

no its not a match

Posted on Jul 01, 2009


  • 164 Answers

SOURCE: 1990 full size blazer starts fine idles then dies

sounds real easy either a bad idle air control solenoid or more likley a blown throttle body gasket. to test fro a blown gasket, with engine running and cool spray carb cleaner or brake cleaner around base of tb were it bolts to intake. when it hits the bad area, should idle down and be normal for a second or 2. iac is possible,try this first since its so common and let me know

Posted on Aug 26, 2009

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My son and I replaced the heads on a 94 Explorer. They were definately cracked. The Block " looked " ok. There was coolant streaming out of the tailpipe. After putting on new heads and putting it...

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To replace it, is a case of removing all of the engine top components, up to and including the timing belt. The inkate manifold, exhaust manifold, to do this you will edd to drop the coolant as well, causing a little mess, and finally taking the cylinder head in a systematic way, normally undoing the head bolts starting from the middle ones and working around in a as to excessively warp the head on removel.

You will then need (strongly advise) that the cylinder head be serviced, to check for flat face, and crack testing (to find out the cause of the gasket failure in the first place).........and then replace the valve stem seals in the process..

Installation is a reverse of disassembly, and you would also be advised to replace all gaskets and seals that are used, they normally come as part f a kit, when the head gasket is purchased.

To take on this job requires a torque wrench for redoing the cylinder head bolts......and definetly a must, a manufactureres manual for all the torque settings, and step by step instructions shoudl you need them.

I would only suggest that you try this yourself if you have done something like this before, or have a friend who has, and is willing to assist you, IF you do not, I suggest strongly to suss out a few repairers and pay for it to be done,,,,,,,

There is a lot that can go wqrong on this type of job, and I would be wrong to advise you any other way !!!!!!!!!!!

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the only thing that causes this is a blown head gasket or a cracked block, the head gasket is the most common problem, the block being cracked rare/

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