CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

1989 K5 - Gradual Learning

First 4x4 - learning basic maintenance / upkeep and maybe some small mods.
I know it was frustrating going for a drive and the truck behaved. The 350 has good power, rolls down the highway nice that’s for sure. I don’t think it’s got a big cam in it and if it is cammed it’s the mildest “RV” cam I’ve ever seen. The lopey idle is not the cam I can attest to that.

The IAC is hunting all over the place though. If we had a tach on it I’d bet it was moving a couple hundred rpm. Plus when you described the feeling sometimes like the truck “wants to go” on its own is a classic symptom of a IAC hanging open. @Wes Harden saw mine doing it last year on onion creek. Same thing would not idle down and was like its own cruise control. The crappy thing is the quality of parts we get even if known name brands like AC Delco and Standard Ignition ain’t what it used to be. Farming production to china while it saves all money sucks when we have to replace stuff way more often than we should. I’m on my third IAC in two years and keep a spare in the truck just because they are crap. It sucks but it’s the reality now.

The plug wire find was purely accidental. It sounded like an exhaust leak until a spark caught my eye. Which of course won’t help idle quality when you are running on 7 holes at that point. While it cruised down the highway with plenty of power yesterday, you would have felt a hard miss as soon as you started climbing elevation on I-70 west of Golden. So we got lucky on that one.

I’m betting even though the wires are pretty fresh AC Delco units, the shop did have to pull them to run the compression test. I’m not blaming them, but with the quality of stuff you only get so many removal and installs before a boot takes a dump. Even less if they only grab the boot and not use the tool like you got.

I’m a little more liberal with die-electric grease. A little dab on the tip of the plug and a little in the boot smeared around.

Once you got those knocked out I think you are ready to go. While waiting on the stuff to put in Thursday take a minute and do a nut/bolt check on the suspension since you went though it all. I’m a big proponent of using a paint pen to mark the nut/bolt after you check it. This will do two things for you. One, you got a visual of which ones you checked until you get them all. Two, after running on a couple of trails it’s a Quick Look to see if anything has moved. You only need a wrench if something moved.

I told Drew if he wanted to take my Tech 1 with him just in case he could. I’m in town until Wednesday when I take off for Indy to work a big Buick/GMC training event at IMS or else I’d be there with him. If anybody helping in Moab wants it with him I’ll get it to him before I bug out to Indy.
 
Running those boot covers works well on my tbi 350, I also had a period where the IAC would freak out. Mine would surge, run rough then die, after 10 or so minutes it would fire up and run good for awhile then the cycle would start again.
 
Running those boot covers works well on my tbi 350, I also had a period where the IAC would freak out. Mine would surge, run rough then die, after 10 or so minutes it would fire up and run good for awhile then the cycle would start again.

How did you fix your IAC problem?? Just a matter of finding the right valve?
 
Yep just replaced it. If it's napa parts for electrical always use Echlin, Denso, or Delphi.

Don't use Proformer.

I also found a couple vacuum leaks on the throttle body I took care of.
 
Last edited:
Last night was an extremely late one... I filled up my gas tank on Monday so it had every bit of 30 gallons in it.

Since the patch was actively weeping, I did not think that I could just slather on additional putty to make the leak stop. I figured that to do it right I would have to remove the old patch entirely.

When trying to catch the gas as it drained... I quickly ran out of pans and ended up using my dog's kiddie pool. What is a guy supposed to do with a kiddie pool full of gas?

Be warned that the audio on this video is a loud song that was playing on my Spotify while I filmed. Sorry about that.

View attachment PXL_20250904_032953377.TS.mp4

Anyhow, AutoZone was out of TankWeld but they had a product called WaterWeld. It says it is good for gas tanks and is resistant to fuel, so I went for it. It took a long time to fully drain the tank... and then I ran a siphon pump to get a bit more gas out before applying the new patch.

I cleaned the surface with brake clean, sanded it, and then slapped on the new putty:

PXL_20250904_070205495.jpg

I am wondering if the gas tank strap on that side is digging into the patches. This last patch lasted exactly a year, which doesn't seem all that long.

If this new patch gets me through BB then I am just going to buy a new tank or ask for help welding this one closed. I am sick of replacing these patches.

While waiting for the tank to drain I got the new IAC installed. It came early.

Today's activities (final prep for the trip):
  • Install new plug wires and plug wire boot protectors.
  • Install a new blower motor.
  • Get my full-size spare tire mounted on the factory spare wheel.
  • Put the skid plate back on.
  • Pack luggage, tools, fluids, and spare parts.
 
Last night was an extremely late one... I filled up my gas tank on Monday so it had every bit of 30 gallons in it.

Since the patch was actively weeping, I did not think that I could just slather on additional putty to make the leak stop. I figured that to do it right I would have to remove the old patch entirely.

When trying to catch the gas as it drained... I quickly ran out of pans and ended up using my dog's kiddie pool. What is a guy supposed to do with a kiddie pool full of gas?

Be warned that the audio on this video is a loud song that was playing on my Spotify while I filmed. Sorry about that.

View attachment 511963

Anyhow, AutoZone was out of TankWeld but they had a product called WaterWeld. It says it is good for gas tanks and is resistant to fuel, so I went for it. It took a long time to fully drain the tank... and then I ran a siphon pump to get a bit more gas out before applying the new patch.

I cleaned the surface with brake clean, sanded it, and then slapped on the new putty:

View attachment 511964

I am wondering if the gas tank strap on that side is digging into the patches. This last patch lasted exactly a year, which doesn't seem all that long.

If this new patch gets me through BB then I am just going to buy a new tank or ask for help welding this one closed. I am sick of replacing these patches.

While waiting for the tank to drain I got the new IAC installed. It came early.

Today's activities (final prep for the trip):
  • Install new plug wires and plug wire boot protectors.
  • Install a new blower motor.
  • Get my full-size spare tire mounted on the factory spare wheel.
  • Put the skid plate back on.
  • Pack luggage, tools, fluids, and spare parts.
Do the straps have any soft material lining?
If not, you need to put something under them to prevent metal on metal rubbing.
I have used 10 mil tape in a pinch, 2-3 layers will do the trick. My patches have held indefinitely, 6 years at least on the last one before I sold the truck
 
That is a great idea!!

While I'm out today I'll swing by HF and pick this stuff up.
 
That is a great idea!!

While I'm out today I'll swing by HF and pick this stuff up.
This stuff is good for patching hoses, it needs 6 layers that fuse and bond together to form a new membrane.
It's not the best product for your case.
Go to home depot and get 10 mil tape and put 2-3 layers in the line where the strap will go.
Make sure to put wide enough so it's wider than the strap.
This:
 
This stuff is good for patching hoses, it needs 6 layers that fuse and bond together to form a new membrane.
It's not the best product for your case.
Go to home depot and get 10 mil tape and put 2-3 layers in the line where the strap will go.
Make sure to put wide enough so it's wider than the strap.
This:
This one even better twice the thickness
 
Figured I should share a Blazer Bash trip report and recap! This is going to be a bit long, sorry about that.

Friday:
  • Got all of the prep work wrapped up around 1:30am Friday morning. Slept for a few hours.
  • Got up early and did the IAC reset procedure since I had a fresh IAC. Took it for a test drive. It died a few times on the test drive but seemed to be "learning". I stopped to fill up gas and it drove home fine after that.
  • Nervously said goodbye to my girlfriend and went to pick up my buddy Rob at his house. We debated taking his XJ... and we debated taking both vehicles separately. I told him that I wasn't sure if we'd make it to Moab but that the Blazer drove fine after getting gas. We decided to just send it so he hopped in with me and we went.
  • The Blazer did just fine on the way out to Moab. It is embarrassing, but my K5 had never been that far from my house... so we were all smiles rolling into town. We arrived a couple of hours before the ORD BBQ started. We got a beer at Moab Brewery and then went to the BBQ.
  • We immediately met @cheavyk10 and @kennyw and chatted with them a bit. We also got to hang out with @Bent77 and @70jimmy. Then The Circus (@mrk5 / @doubletrouble / @Raggedy_Ann) showed up and we got to talk with them a while as well. Rob and I asked around about Poison Spider. We weren't sure whether my Blazer could do it or not. The overall consensus was, "it is going to be tough". This is exactly what @ZooMad75 told me before leaving town. Kenny said he would be open to doing an easier trail with us (e.g. Fins 'n Things) so long as we could find another person to come along who had a winch. That sounded great to Rob and I so we decided we'd just figure everything out at City Market the next morning. The BBQ was a great time - I didn't win any raffle prizes but I got a sweet Tom Woods shirt from the swag table.
  • Rob and I went home (Moab Rim RV Campark) and drank a beer in front of the fire.
Saturday:
  • Got up and did a nut and bolt check on the Blazer. @AgDieseler came out of his cabin and went over to the white ORD truck which was nearby. I introduced myself and we chatted a bit about Poison Spider. David shared the same caution as others at the BBQ.
  • Rob and I headed to City Market to meet everybody. We couldn't find anyone else to run Fins 'n Things, so I piped up at the driver's meeting to say I was a bit worried about making it through the trail. @kgblazerfive and the others encouraged us to come along on the trail so we decided to go for it.
  • I was nervous as hell driving from City Market to the trailhead. Rob and I talked about bailing at the last minute and running something super easy... but then we would be alone. Ultimately we decided that we'd be better off just going for it and staying with the group. We didn't want to drive all that way just to miss out on participating.
  • On the trail we got to meet @Fastereddie, his brother Kenny, @HankScorpio, @4XoR, @HungryHippoK5, and others. We spent the majority of our day in a pack of five with Kenny, Dan, Duane, and Eddie+Kenny. It was so much fun. We were following Dan and he made it easy. All I had to do was follow his line. When we got to the tough stuff, Eddie or one of the two Kennys spotted us. Again, they made it easy. I couldn't even see over the hood so it was invaluable having such good guides.
  • After the trail, Rob and I went to Proper Brewing and met up with a friend of mine from college. We had a nice dinner and chatted a while and then headed back to Moab Rim Campark. Rob and Dan had exchanged numbers earlier, so we sent Dan a message to see if they wanted to meet up for a beer. We ended up drinking a few with Dan, Mark, Eddie, Kenny (Eddie's bro), Duane, and @fastazz81. Steve had broken a few things on Poison Spider and I did not get the chance to shake his hand prior to this point so that was great. We all shot the shit for a couple of hours and turned in.
Sunday:
  • Rob was hesitant about running another trail because he did not take Monday off and wanted some time to prep for work the next morning. We had a great brunch at Cactus Jacks and hit the road. We saw The Circus as we rolled out of town and it was the cherry on top to honk and wave as we went by. The drive home was totally painless.
The Blazer still has a bit of a shake, but I care less now. I have a TBI rebuilt kit in the garage and I'll probably do that. If that doesn't help then I'll probably check whether the distributor has play in it. If that doesn't help then I'll probably check motor mounts... but right now I'm thinking more about a winch, an air compressor, and rock sliders (lol).

My only regret from this trip is not getting to spend more time with The Circus. They have helped me so much (so many times) that I was bummed about not getting to hang out much. Next year I intend to spend more time in Moab and I'll ask to ride shotgun or something if my Blazer can't make the trail they're doing. Other than that, it was an ideal experience.

Thanks if you read this far and thanks to everyone who has helped me with my Blazer over the years!
 
It was good meeting you and rob, would have liked to hang longer Saturday but 5 am and my 18 hr drive loomed over me. The best part about blazer bash is meeting the people face to face and everyone making sure we all have fun and make it off the trails.
 
Hell yeah Amigo! So glad it was a good experience for you, it was my first time as well and I am looking forward to many more years to come. Keep us up to date on any upgrades in prep for next year!
 
It was great to meet you out on the trail. My buddy and I were further forward in the pack and both were psyched every time we saw you come up over an obstacle behind us. Poison spider with open diffs and 10 bolts on 35's is a real accomplishment, well done! Lets do it again next year.
 
Top Bottom