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.

1988 K5 silverado... 2 knock sensors or two Coolant temp sensors?

Discussion in 'The Garage' started by dirtwarrior17, Apr 1, 2005.

  1. dirtwarrior17

    dirtwarrior17 Banned

    Joined:
    May 14, 2004
    Posts:
    1,820
    Likes Received:
    0
    Location:
    Redding, CA
    I got an extra sensor left over from my 88 block to '79 block swap and i don't know what the hell it is. The motor runs fine without it and it either senses vibration or temperature. I don't have pics........

    Any ideas?

    I know some models had 2 cts or two knock sensors just not which models.

    Where does it go?
     
  2. 90blzr

    90blzr 1/2 ton status

    Joined:
    Mar 25, 2001
    Posts:
    3,027
    Likes Received:
    0
    Location:
    SO CAL
    You got the one in the front of the intake? (coolant temp), its kinda hidden.
     
  3. dirtwarrior17

    dirtwarrior17 Banned

    Joined:
    May 14, 2004
    Posts:
    1,820
    Likes Received:
    0
    Location:
    Redding, CA
    Yup... the front cts is hooked up and in the front of the manifold next to the thermostat... the leftover sensor doesn't seem to fit anywhere...
     
  4. tx_sub

    tx_sub 1/2 ton status

    Joined:
    Mar 5, 2004
    Posts:
    548
    Likes Received:
    0
    Location:
    Denton, TEXAS
    assuming your 88 block was fuel injected, it had two cts's. the one in the intake is for the computer iirc and the one in the driver side head is for the guage.
     
  5. sled_dog

    sled_dog 1 ton status

    Joined:
    Sep 3, 2002
    Posts:
    16,870
    Likes Received:
    0
    Location:
    Austin, TX
    The knock sensor should be on the passenger side above the oil pan. Coolant temp is in the front crossover and there is another sensor that goes into the head on the driver side. It goes into a waterjacket but I have no idea what it does. I run a 70s motor with TBI in my Suburban, I had to get adapters to put that sensor into my older style heads. Maybe thats the one you are having trouble with.
     
  6. dirtwarrior17

    dirtwarrior17 Banned

    Joined:
    May 14, 2004
    Posts:
    1,820
    Likes Received:
    0
    Location:
    Redding, CA
    yup... sounds like that the one... Can i use it on Camel humps?
     
  7. dirtwarrior17

    dirtwarrior17 Banned

    Joined:
    May 14, 2004
    Posts:
    1,820
    Likes Received:
    0
    Location:
    Redding, CA
    I haven't checked it this will fit yet but can i run it off the water pump or is that too far away from the heat?
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,975
    Likes Received:
    189
    Location:
    Roy WA
    Single prong round connector=knock sensor
    Single prong (typically a nail head on the senor) is coolant sensor for gauge.
    Dual prong is CTS.

    Coolant sensor for the gauge really doesn't matter where it is, since it's relative, but it would look odd to have the gauge reading 150* all the time. Every head I've seen has been drilled/tapped for that sensor, although there are two different threads used, as mentioned, its easy to adapt.
     
  9. dirtwarrior17

    dirtwarrior17 Banned

    Joined:
    May 14, 2004
    Posts:
    1,820
    Likes Received:
    0
    Location:
    Redding, CA
    Can i run it out of the water pump plug? The camels don't look like they have a spot for a sensor.
     

Share This Page