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I wanna blow the GMC up!


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#1 WNYTractorTinkerer OFFLINE  

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Posted July 15, 2015 - 08:06 AM

Darned GM engineers got the great idea that they could hold on V-8 exhaust manifolds with M8 bolts!  That pompous a$$ should be fired!!  He didn't think about our salty WNY winters when he called that shot!  3 out of the 12 manifold bolts had missing head when I looked around to investigate the ticking noise my truck has been making for a while..  Seems the driver's side rear bolt has been missing for quite a while.. Up goes the truck on stands and the torch goes to work to remove the exhaust pipe flanges..  (I tried to start my holey jeans on fire as the torch passed by after lighting it)  I felt this burning sensation and put it out with my other hand!!  DANG!  The flange bolts wheeled right off after heating them..  This won't be so bad after all??!?!

 

 The driver's side has the steering column and all the electrical junk on it so..

 

Why not start there?  

 

I struggled with the bolts (which they glue into the aluminum head) I finally get them all out and twist and maneuver the manifold out..  GRRRRR..  The rear bolt had busted off inside the head about 3/16"  Not gonna be easy to extract that one..  Nope- can't extract it because there is NO clearance behind it..  The firewall is about 2.5" in front of it.. So I study the problem for a while and scratch my head and ponder removing the head to fix it..  NO WAY!!  I googled the problem and find it's quite common and issue all over with these trucks..  I broke out the welder and gobbed up a bead from the busted bolt to a washer then welded a nut on top..  I got it to move 1/2 a turn before it busted off..  2 more tried and the same results (minus the half turn that is)..  Time to walk away..  

 

IMG_2024.JPG

 

Let's do the other side a while..

 

The passenger side's front two bolts are gone too..  

 

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As I removed the other bolts two more busted right off leaving me with 4 little nubbys in the head..  Better yet, I removed the dipstick tube hold down nut and then pulled up the dipstick with about half the tube with it..   :wallbanging:

 

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It was easy to remove the manifold then..  4 little nubby's all in a row..

 

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All is great if I want to put the manifold back on with the two center bolts and never check the oil!!  

 

 

Nah..

 

I'm now emptying my shop of 3/8" nuts as I welded them on the nubby's to remove them..  A couple retries as the weld wasn't strong enough..  Success!!  

 

Then out came the angle die grinder to clean the head up and we have:

 

IMG_2026.JPG

 

Good to go!

 

Now to remove the starter and get to the rest of that rusty dipstick tube..  

 

That's when I walked out of the shop to order parts in fear that I'd roll the thing out and blow it up..  (I really felt like doing it!)

 

As I ordered it I discovered a neat repair kit to use on that drivers side rear bolt so I didn't have to remove it!!  It's in the mail since nobody local has it..  (surprising since I see so many GM trucks all over)  

 

The busted dipstick tube waits for me to have the patience and lack of anger to remove it in a fashion so I won't have to remove the oil pan to retrieve the bottom piece..  More to follow there I'm sure..  The truck has a home for a while in the middle of my shop floor..  I've got to fix some more electrical things for someone..  I'm so glad I took this vacation!  (I need a vacation from vacation?) 


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#2 bh115577 OFFLINE  

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Posted July 15, 2015 - 08:54 AM

What's the kit to remove the broken manifold bolt on the drivers side? Mine's ticking as well until it warms up.



#3 crittersf1 OFFLINE  

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Posted July 15, 2015 - 08:59 AM

...... and people wonder why WE mechanics charge so much!


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#4 hamman ONLINE  

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Posted July 15, 2015 - 09:11 AM

Been there done that. I have a 1993 Chevy Silvearado 1/2 ton we are going to start working on to restore / customize in a year or so. Already see three manifold bots are missing heads on them. Michigan is the same with all the salt used to clear roads in the winter. The wife and I went out the other day to check out the hunting truck (1992 Chevy 1/2 ton ) and when I pulled the dip stick I only had part of it .... the handle! Had to dig out the rest and make a suitable replacement for it.   Glad to see you are making headway. Good luck.                                                                                                                                            Roger



#5 glgrumpy OFFLINE  

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Posted July 15, 2015 - 10:04 AM

Most of these bolts are "Special" anymore. Have little dab of sealant on them to hold them in. Any time  you have Steel and alum, you have trouble, not sure why they like to use it so much on an engine. Keep in mind also that they used NO gasket on the new, orig engines there and you NEED to go get some for the re-attachment now. Not sure why they don't use gasket new either, but that is still that way. How about the NEW engines now being ALL aluminum, cept the HD ones. The blocks are too now on the standard engines. Has to be a 6 litre to get iron engines now, and is still the last gen design on those. That is another good reason to get 3/4 ton truck I'm thinking.  Too hard to work on stuff now days, I do little myself anymore.  Time to trade in?? The ones at work that trade every other year must have it about right. About time they need maintainance  they trade them in, ha!



#6 Jlaws OFFLINE  

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Posted July 15, 2015 - 10:59 AM

I felt the same way a couple of weeks ago when I had to replace all the brake lines on my 2004 Silveraldo . :wallbanging:   . My neighbor who owns a business and has two 2003 Silveraldo's had to replace brake lines on both trucks last year . Rusted out brake lines are such a problem that GM came out with a full replacement kit (7 lines in kit ) and they had to back order mine and it took them 5 days to get it in because of the demand .  

 

TractorTinkerer , what year is your GMC ?? I was wondering if I might have this problem down the road . It might be time for me to look for a new truck ...... :smilewink:


Edited by Jlaws, July 15, 2015 - 11:00 AM.


#7 LilysDad ONLINE  

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Posted July 15, 2015 - 11:04 AM

 

 

 

..  

 

 

 

 

 

That's when I walked out of the shop to order parts in fear that I'd roll the thing out and blow it up..  (I really felt like doing it!)

 

  I'm so glad I took this vacation!  (I need a vacation from vacation?) 

. . . and you folks will go out and buy another one of these when it's time and say they are your favorite brand and give the finger to a FORD when it drives by. Go figure!


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#8 Marty'70 ONLINE  

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Posted July 15, 2015 - 11:11 AM

...... and people wonder why WE mechanics charge so much!


Or wonder why our vehicles are in the worst shape.. Like I wanna go add to my headache by looking at another problem.. "It'll be OK I'll look at it tomorrow..."
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#9 TAHOE OFFLINE  

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Posted July 15, 2015 - 11:23 AM

. . . and you folks will go out and buy another one of these when it's time and say they are your favorite brand and give the finger to a FORD when it drives by. Go figure!

 

rolling by on top of a roll back doesn't count as "Driving by"  :poke:  :poke: :bigrofl:  :bigrofl:  

 

 

I never had an issue when I swapped motors in my Tahoe, all my bolts were tight and came out without issue, I dunno


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#10 LilysDad ONLINE  

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Posted July 15, 2015 - 11:28 AM

 

 

 

I never had an issue when I swapped motors in my Tahoe, all my bolts were tight and came out without issue, I dunno

Wasn't that the one that just had a motor swap 7 month before that? Good on you for using Nevuh Seez'!!!



#11 TAHOE OFFLINE  

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Posted July 15, 2015 - 11:46 AM

Wasn't that the one that just had a motor swap 7 month before that? Good on you for using Nevuh Seez'!!!

 

 

Nope, not me.



#12 Alc ONLINE  

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Posted July 15, 2015 - 11:57 AM

You guys have me afraid to look close at the bolts on our 2001 GMC !
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#13 Username OFFLINE  

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Posted July 15, 2015 - 12:24 PM

. . . and you folks will go out and buy another one of these when it's time and say they are your favorite brand and give the finger to a FORD when it drives by. Go figure!

Lots of people give the finger to Ford's when they launch a Spark plug.

 

Now if you'll excuse me I have to fix an exhaust leak in my 2003 Sierra.


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#14 LilysDad ONLINE  

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Posted July 15, 2015 - 12:28 PM

Lots of people give the finger to Ford's when they launch a Spark plug.

 

Now if you'll excuse me I have to fix an exhaust leak in my 2003 Sierra.

:bigrofl:



#15 WNYTractorTinkerer OFFLINE  

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Posted July 15, 2015 - 01:44 PM

What's the kit to remove the broken manifold bolt on the drivers side? Mine's ticking as well until it warms up.

You fix it without removing the manifold..  I could have done the same but an glad I fixed it since the dipstick tube was grenaded!  

 

HERE is the part and it's cheapest @ Rock Auto..


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