Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

ARGH! Did we blow a head?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Blazer_Boy, May 4, 2001.

  1. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    I pretty much know the answer but just wanna know what I'm in for. Here it goes....My mom comes home and I didn't hear the Jimmy (1989 TBI), turns out she had to walk back from the store because the sucker wouldn't start. So I grab my tool box and jumper cables figuring it was electrical and jump in my Blazer. Get down there and bump the switch..CLUNK, the battery gauge goes to nothing but the lights dont dim. I tighten the connections on the battery and look at that little indicator eye, its bright green so the 5 month old Delco battery is alright. Wait around a while trying to turn it over and it still won't budge. I thought it might be frozen but figured it was crazy talk. It cools of some more and I bump it again, it turns over and starts to go, while it does this there was a single clank comming from the engine.

    We're off and Im following her home in my truck. The thing gets warm and doesn't have crap for power. White smoke starts to billow and the smell...coolant. It was missing too. We get home and she said when she tried originally at the store it started to turn over and it just up and stopped. Yup, it was frozen. So I pull all the plugs off the drivers side (drivers pipe was smoking so I checked only this side). Plug 1,3,and 5 looked good. Pull number 7 and out comes a GUSH of liquid. Hmm, I think I can safely thats not right.

    So basically how much for a new GM head and what am I up against.

    <A target="_blank" HREF=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</A>
     
  2. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    You proababaly just blew a head gasket. Its pretty hard to crack a head unless it got way overheated. Or the weather has been below freezing and you dont have any antifreeze in it.
    You'll just need the head and intake manifold gaskets. I dont think there are any exaust manifold gaskets on a 89 .Mine didn't have any.
    Might as well replace the head gasket on the other side too while you have it tore down. It might be getting ready to go also
    The gasket set should cost around 35.00 .
    If you do have a bad head You can pick up a set of rebuilt heads from a machine shop they usually cost around 250.00. You should replace them as a set.
    The job weather replacing the gaskets or putting on new heads is the same.Its' not too hard if you are mechanically inclined You will need a torque wrench to tighten up the bolts correctly. The distributor needs to be pulled so mark its position so it will be in time when you put it back in. And the valves will need to be adjusted. So if you haven't done this job before a good manual is a must. So get greasy and become one with the K5.
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    Is there any check that can be done for sure to know which is bad. After doing the valve cover change from hell (see "one of those weekends" under the off-topic board) this shouldn't be bad. When I pulled off the #7 plug there was ALOT of coolant. It was even running out the exhaust and pouring over the pumpkin.

    <A target="_blank" HREF=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</A>
     
  4. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    I'd take the heads to a machine shop... have them go through them, clean them, check for cracks and replace the valve seals... then you'll cover everything. this usually is pretty cheap and is excellent insurance if you plan to keep the truck a long time. Another thing I would check is from the amount of coolant described... double check to see if it found it's way into the oil (will look soupy or milky...) If it did I'd just say screw it and get a motor. Once antifreeze gets on the bearings they go to hell quick. It also leaves a coating on that hinders oiling. Just my $.02 worth... hopefully it is a head gasket only (you can tell by looking at the gasket once you get everything out) Good luck!

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  5. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    Pulled the dipstick right when we got it back home and it was good. The trucks getting sold after everything is fixed. Its my dads and he doesnt care for it. He wont do a single thing to it but the original owner said he'd buy it back if we ever decided to drop it. He had it painted and put the 6" lift w/ 33"s on it. It deserves to be with someone who will at least do something with it. My dads like a teenage girl when it comes to vehicles. He'll drive it with out doing anything else, taking to the dealer to have it fixed at the drop of a hat. I have to do repairs behind his back. It has a missing body mount and he about cried when I suggested getting a new one. So I went got the mount and put it on behind his back, hehe.

    I think the truck has a death wish because all at once the heater went out, gas tank sprung and that head or gasket cracked. I'll pull off the head tommorow or start and have a peak. Then on the weekend fix it with whats needed.

    <A target="_blank" HREF=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</A>
     
  6. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    LOL... sounds like your old man is like mine... My whole family is put key in and it starts the car is fine, turn the key and it doesn't start "The D@mn thing is broke... call someone to fix it". Everyone keeps asking if I was adopted or a result of an affair LOL [​IMG]

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  7. muddin4fun

    muddin4fun 3/4 ton status

    Joined:
    Feb 19, 2001
    Posts:
    5,644
    Likes Received:
    0
    Location:
    N Texas
    Do what capt says. If anything, have the surfaces where the head gasket meets smoothed or that thing won't seal very long if at all. Since your selling the truck, I wouldn't worry too much about having the heads redone unless they're really bad. A lot of times, when headgaskets start blowing and heads really need to be done, the bottom of the motor is gonna go out soon too, so if yer sellin, sell quick and to someone you don't like! LOL!

    [​IMG]
    <A target="_blank" HREF=http://k5chevyblazer.homestead.com/home.html>http://k5chevyblazer.homestead.com/home.html</A>
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,170
    Likes Received:
    1,380
    Location:
    E-town baby!
    Heater core failures often lead to overheating which usually results in a blown head gasket. Chain reaction. I had an 88 GMC that developed a crack in the heater core outlet and dribbled very slowly for a few weeks. Eventually the motor didn't have enough coolant to do the job and it overheated taking the head gaskets out. I had to have the heads mildy surfaced and figured I might as well have it all freshened up. New valve seals and a had them crack checked just to be sure. It ran like a charm after that...oh yeah the motor only had 35,000 miles on it at the time.

    The machining and all is actually not that expensive, but it is definitely worth it.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  9. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    I betcha that sucker was low on coolant. The rad hose had a slight leak when I was driving for a week when I had my Blazer's carb and distributor getting redone. I checked it all the time and kept everything filled and told them to check it regulary (was a very minor leak but over time it can add up).

    I guess I should have expected this because my mom killed our '81 twice. When I was a wee little turd they bought from my grand parents when it was less than 10 years old. They had some dumby do the repairs before we got it. Well my mom decided it would be interesting to drive on an empty crankcase. Clank bang seize, good bye 305. I always just took it with a grain of salt even though it was a 305. She claims that the altenator and oil light were rigged up backwards by said dumba$$ mechanic. I got to thinking after questioning her on it the other day after remembering years gone by. The story began have some interesting flaws. Flaw one is that this vehicle is equipped with gauges, not lights. Flaw two, its impossible to hook a the battery gauge and the pressure gauge backwards, the pressure sender wire wouldn't reach. Flaw three, would the pressure gauge even work if you tried hooking it up backwards. Flaw four, if something was wrong with the gauges, why would you drive it around still. Damn women (not all of you of course, this site has defintely should me that). Then right before I could drive the tranny gasket began to leak so it was always low on tranny fluid. I would check all the fluid levels and stuff when I was being little mechanic back in middle school and I noticed that the tranny was always low. I told her to watch that fluid. I get my license and pull the stick, bone dry. Well needless to say, one month after driving it, no upshift at all. I guess I'm b*tching because I just spent 3 hours today cutting the crap outta my hands and swearing while working on removing that head. I haven't recieved one thank you or acknowledgement. Instead I getting the b*tchy mode from mom because she wants me to haul some stupid ass plant home from the greenhouse in my '82. My tailgate is severly f*ed up and it doesn't come down for anyone until this summer's restoration. She knew that but still expected me to risk opening it up when I'm not sure if I can't get it back to lock and the glass up. Whew, good rant, thanks for listening, they can fix there own damn head.

    <A target="_blank" HREF=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</A>
     

Share This Page