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  1. K5Rob

    LS rear main seal leaking

    Hey guys, trying to diagnose a leak which I am guessing is either the rear main seal or the cover itself. It does drip but it doesn’t leak bad, in other words the level on the stick stays fine, I haven’t had to add any oil yet. So I am partly trying to decide if it’s even worth it yet, and...
  2. K5Rob

    K5 Frame Crack Honest Opinion

    I know the K5 frames like to crack by the steering box. I read something like “they are all cracked” or “if it isnt cracket yet, it will be”. Well, mine isn’t cracked. At least i cant see any cracks and I have looked damn close. I know i should just get the plate kit but I am also from the...
  3. K5Rob

    Which bulbs are high beams

    Hey guys, with high beams on, which bulbs on this style front should be illuminated? And with sealed beams is there a different part number between high and low beams?
  4. K5Rob

    Master cylinder ran dry

    Hey guys, adding extended brake hoses on my 87 K5 due to lift kit and finding some cracks. In the process the master cylinder went dry. At the time I thought it wasnt a terrible idea as the fluid looked pretty crappy anyway. Can i bleed the entire system as normal, cracking farthest bleeder...
  5. K5Rob

    Under dash speaker opinion

    Looking for opinions. This is all budget oriented. Not a resto or hi end or anything like that, I have been sitting on a nice pair of 4x6 aftermarket speakers i planned to cut in under the dash before i realized that its tight. I actually screwed up and cut in the passenger side one before...
  6. K5Rob

    Defrost duct gap

    There is a gap between the defrost duct and the inside hvac “main” box. This is a 87 K5 with AC. Am I missing a piece or is this how they came?
  7. K5Rob

    3055645 duct baffle

    IYKYK. This baffle is in my 87 k5 blazer hvac box. The truck does have ac. The baffle is tied to a metal damper via a linkage on the outside of the box. The baffle is driven by the metal damper. There is a rod that goes thru the center of it. These baffles are prone to breakage apparently and...
  8. K5Rob

    Dimmer switch rod and other issues

    87 k5 blazer, tilt column, my dimmer switch rod is not making contact with the lever, someone has obviously messed with this column, i am not sure if maybe something is missing? Also I found a random spring not sure what that is for. Column is not locking, maybe someone has a diagram...
  9. K5Rob

    Vents smell like piss

    Hey guys, this truck is pretty new to me as in I just started driving it after doing a bunch of work. When I turn on the defroster or any vent I get this stale piss type smell. Worried it’s a mouse nest. I removed the blower motor, also under the dash i removed some of the lower duct work and...
  10. K5Rob

    K5 Top Removal

    87 K5 Blazer. I know there are posts on this but mine here is specific to removing the top using an engine lift. Anyone done this, also approximately how much does the top weigh? Trying to accomplish this with one person behind the lift and one person holding a corner of the top to stabilize...
  11. K5Rob

    Vacuum lines for hvac system

    Hey guys, 87 K5 Blazer, just did an engine swap, I have a functional hvac blower but cant switch settings (defrost etc). Then i recalled I had never hooked up any vacuum lines, and Im not sure if they were hooked up before. Could someone describe where the line/s exit the firewall and where they...
  12. K5Rob

    LS fuel pressure regulation issue

    Hey guys I have been battling high fuel pressure using the corvette style filter/regulator on my 5.3 swap which has a returnless truck intake. Fuel pump is from a late 90s Vortec 350 which fit my TBI sending unit perfectly, p/n P240KC, which cross references with EP381. I am chalking this up to...
  13. K5Rob

    Torque specs, spring bolts and u bolts

    87 K5 Blazer. New spring packs. If anyone can help, torque specs are needed for spring eye bolts and u bolts. Front spring bolts are 9/16 front and 7/16 rear, and the rear spring bolts are 9/16 front and rear, all grade 8, and all U bolts are standard size. Here’s a before and after pic...
  14. K5Rob

    Leaf spring bolt sizes

    87 K5 Blazer Installing spring packs and need bolts. Ordered from Rock Auto but they were wrong. Bushings measure 9/16 but how long? 5”? And the front spring front bushings measure more like 7/16 but will be a little sloppy. Is that ok? Or are they metric or something?
  15. K5Rob

    LS surging idle throttle blade hole

    Hey guys I have a 5.3 LS in my K5 Blazer with a mild cam and a 3200 stall converter. This motor was in my 04 2wd that I had for years and it worked great but would surge at times, during idling or shifting into reverse in some cases and kind of almost stall but maybe very very rarely actually...
  16. K5Rob

    Transfer case drop

    87 K5 Blazer, 5.3/4L60E/NP208 I am planning on a lift kit in the 2-4” range and a transfer case drop is recommended by the mfr. I just finished squaring away my transfer case stiffener arm that runs up to the bell housing. (Had to lengthen it but it was off a parts truck with unknown running...
  17. K5Rob

    Oil pressure gauge not working

    87 K5 Blazer, oil pressure gauge not working. Just did an LS swap, using the sender that was in it before. I had the wife sit in the cab as i grounded the connector and it came to life. Then i ran it for a moment and it was working fine. Also had that bounce when you turn the key. Now, nothing...
  18. K5Rob

    LS bellhousing stiffener rods

    On my K5 when it had its original 350 and 700r4 there was a stiffener bar running from the bell housing to the side of the 208 transfer case and also a stiffener bar on each side running from the bell housing up to the motor mount area. So a total of 3 rods. Not sure if they have a specific name...
  19. K5Rob

    Taillight wiring

    My taillight wiring is all hacked up. I am going to run it from about midway frame back. At that point it looks like trailer wiring (4 wire) does it just stay that way back and then split somewhere under the tailgate? I just want to replicate the factory wiring as close as possible, doesnt need...
  20. K5Rob

    Electrical component ID

    87 K5 Blazer 350 TBI, what are these two items found under steering column area? First box is labelled “AC”, two pics Second box with the fins is labelled “Lectron”
  21. K5Rob

    LS swap DBW pedal geometry

    Hey guys getting real close to start up. 04 LM7 in an 87 K5. Its a DBW motor. The pedal assembly mounts to the firewall no problem but the arm is a lot longer than the existing setup and also kicked over towards the center hump. I ended up cutting the arm somewhere in the middle and I have some...
  22. K5Rob

    K5 frame crack

    Anyone have pics or a description of where the frame likes to crack on a 87 k5 4x4, up by the steering box. I have looked on the truck but dont see anything, perhaps I am not looking close enough or in the right spot. Been searching for pics and cant find any.
  23. K5Rob

    K5 3” lift question

    I want to lift my 87 K5 3”. Can I just go with a 3” tapered steel block front and rear? Obviously would need longer u bolts and shocks as well. Where can I get extended shocks? I was looking at rough country 4” lift which comes with spring packs. My spring packs are good. I also read reviews...
  24. K5Rob

    Fluid film / paint

    I am in the process of doing some body work (rockers/floor patching) and want to clean up my frame while Im at it. There is what appears to be paint that is mostly just flaking off. The frame is solid with lots of life left. Im going to fluid film the frame and probably the floors as well. I am...
  25. K5Rob

    Sending unit plug

    How do you disconnect this plug on an 87 K5 5.7 sending unit?

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