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94 gmc sierra 5.0 a/c bracket


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dr.donut
User

Sep 14, 2017, 12:44 PM

Post #1 of 8 (506 views)
94 gmc sierra 5.0 a/c bracket Sign In

I'm replacing the leaking radiator and want to clean up the motor to find the source of other small leaks , I was going to take off the a/c bracket thinking it would make cleaning things up easier but there is one nut on a stud next to the idler pulley that is buried in a pocket and I can't get a socket around it because there ain't room between the nut and the wall of this recess , can't get a wrench in there either . The whole bracket is pivoting on this last nut so is there a special tool , thin wall socket , trick or someway to get it out of there ?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Sep 15, 2017, 5:53 AM

Post #2 of 8 (468 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

dr. donut: Boy you come up with a lot of vehicles and issues! There are a zillion type of wrenches, sockets for obstructions or with a look know the part must be out of the way I can't say that one specifically you need a tool or just keep removing things in front of it.
Back up one: You had a known leak you found and fixed - radiator said is now new if leaking would have or could have sprayed some coolant all around to fool you of the source. You are dismantling this front of engine just to see if you can find more leaks? What fluid is suspect now? I ask because if you just move the compressor and it's not a problem or leaking itself just on a hunt you may open up problems you don't have with this now on your guess there's more.


I'd seek other ways to find out if leaking anything. Just clean what you see for gaskets sprays, cloth on a wire or something just where you suspect and even powder would show it coming back if too slow to actively leak. I totally do NOT suggest power washing engines or solvents to clean them done especially if now about anitique you'll cause problems you don't want so go easy.


Remove whatever is in the way if you must get this bracket off there's something hidden you haven't found.


IDK what tool would need to see it and why difficult or impossible without maybe moving compressor out of the way? I'd avoid that unless you are sure you have an active leak. Pressure up cooling system cold and let it hold and just look - mirrors or whatever works.


Assorted tough bolts and nuts is a reason most of us probably have 50-100 types of 1/2" or 9/16th" sockets, wrenches, crowfoot ones, obstruction ones, open end ratcheting ones and so on.
Clue for you for 1994: If the bolt is to the engine itself it should be SAE and if to another component other than block or head will be Metric so need both. 1/2 and 13mm will fool you as 9/16th and 15mm at a glance look the same at a glance.
Other: 16mm and 18mm is missing from many sets nothing SAE will do if those sizes,


T



dr.donut
User

Sep 15, 2017, 6:35 AM

Post #3 of 8 (461 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

So don't even use engine brite /degreaser on the block for the oily grime ?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Sep 15, 2017, 7:06 AM

Post #4 of 8 (456 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

No! It's done all the time and engines don't like it! Hey - even marine engines are protected from getting wet and if they do are a total heachache to get up and running without computer anything the electrical anythings connection, motors, rubber parts and more on that list. Wipe things clean spot by spot if looking for a leak if at all possible or isolate what you use a solvent on so it or how its washed off doesn't harm anything.
What are you thinking is leaking still? Engines almost all get greasy in spots and dirty even with nothing really wrong and it doesn't harm anything to leave it to a point.
Leak may be done it will slowly go away if a mess now has been fixed.


It's plain old enough and of the vintage when oil is suspect PCVs can't overcome blow-by of engine pushes out oil thru gasket all over the place. You can tell it's not working properly just checking PCV and hose + any gasket as applicable are good. Then check oil dipstick just at idle should be a very slight vacuum there no blow out of it can check with smoke if it blow out or sucks smoke in.


Back: This being an A/C bracket could have been changed since new to change type of compressor? IDK for certain what it really came with new and you might not either if done well ages ago?
#1 is does cooling system hold pressure now, cold check and for a looooong time? If know full it should show if with air that spot may bubble with soapy water.


Other: Don't forget hose to recovery tank and clamps good or done new and check for cracks of the recovery tank isn't under pressure for 1994 that I know of. Fan when running will blow anything messy all over the place if it can if in that breeze,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 15, 2017, 8:28 AM

Post #5 of 8 (446 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

I clean a lot of engines because I buy used cars. This is the neatest and cleanest way to do it.

Buy some heavy duty degreaser like Purple power (Not gunk) that has no oil base and dilute it a little. Use one of you garden sprayers and spray down everything including fender well and bottom of hood. Keep the fenders wet to protect the paint. Now use a weak electric pressure cleaner (under 2000 PSI) and just be gentle on modules or distributor caps. Immediately blow it off with compressed air and start the engine. Let it run till it all dries out. Be careful not to shoot water into the intake.

This will leave it clean and dry. NEVER use Gunk spray. It stinks for weeks after.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dr.donut
User

Sep 16, 2017, 6:02 AM

Post #6 of 8 (418 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

then thats what I'll do , I think a 1/4 " drive 13mm deep well will get to the bolt I just have to get one . It appears that coolant is seeping from the water pump ports where they bolt to the engine , and I would find a small puddle of oil on the intake at times so it appears the valve covers are also leaking but with the fan blowing things around those are assumptions , The coolant could have come from the spongy/ bloated radiator hose so those will get replaced along with the radiator . I'm basically getting done what I can so that I don't have to do it in the winter , thanks again .


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 16, 2017, 11:35 AM

Post #7 of 8 (407 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

General rule when fixing oil leaks. Start with the highest one and work down. Oil leaks can travel and be deceiving.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dr.donut
User

Sep 28, 2017, 1:18 PM

Post #8 of 8 (356 views)
Re: 94 gmc sierra 5.0 a/c bracket Sign In

Purple works good , nothing was leaking but the radiator and it would accumulate where the fan would put it , still a small amount of oil will sit on the intake can't tell where that comes from we'll call that residual , new steering box and pittman arm , going to the muffler shop tomorrow good to go .






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