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.

oil pressure guage and tach

Discussion in 'The Garage' started by Big GMC truck, Mar 12, 2006.

  1. Big GMC truck

    Big GMC truck Registered Member

    Joined:
    Aug 23, 2005
    Posts:
    73
    Likes Received:
    0
    Location:
    California
    1984 GMC truck K1500 305
    I'm about to buy a tach and oil pressure guage for my truck. After doing research, I think I understand the installation process. Please tell me if I'm heading in the right direction. The pressure guage I'm going to buy is electrical, so it should come with an electrical sender that threads into the intake manifold by the dist., right? For the tach, where to I get the rpm signal. Is there some place on the ignition coil that gives a rpm signal? Thanks for the help.
     
  2. diesel4me

    diesel4me 1 ton status Premium Member

    Joined:
    Jul 24, 2003
    Posts:
    17,547
    Likes Received:
    937
    Location:
    Massachussetts
    Hei...

    On your HEI distributor cap,there is a "Tach" terminal,located near the big red 12V power wire..thats where the tach wire goes to...:crazy:
     
  3. mo

    mo 1/2 ton status

    Joined:
    Jun 29, 2004
    Posts:
    542
    Likes Received:
    0
    Location:
    Folsom, CA
    if you're like me and are gonna buy a cheap pos oil pressure guage, i would just get a quality one, the damn needle bounces all over the place on the el cheapo one
     
  4. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

    Joined:
    Jun 13, 2003
    Posts:
    29,622
    Likes Received:
    1,376
    Location:
    Jersey Shore
    the oil pressure passage is actually right behind the intake on top of the block.. 1/8 NPT

    as Deisel pointed out, Hei will have a spot on the cap for tach..if non-hei, negative side of the coil is where you go..
     
  5. RootBreaker

    RootBreaker 3/4 ton status Premium Member

    Joined:
    Nov 29, 2001
    Posts:
    5,117
    Likes Received:
    173
    Location:
    Williamstown, NJ USA
    as you already stated and others agreed....


    oil goes next to the distributor.... and it isnt in the intake though.. I just removed my intake and the oil sender unit stayed... I also had 2 different spots I noticed for it.....

    also tach... yes you just get a tach... red = to ignition (not battery as mine is hooked that way and just found my battery draw draining my system.. yup the tach) ... black = ground and usually green is what they use for the tach wire... that goes right to your distributor... if you look ontop of the cap.. it will say... Tach.... so that will go there :wink1:
     
  6. RootBreaker

    RootBreaker 3/4 ton status Premium Member

    Joined:
    Nov 29, 2001
    Posts:
    5,117
    Likes Received:
    173
    Location:
    Williamstown, NJ USA
    oh yeah also if ya wanna keep it cheap....

    you can goto car-part.com and check (but posting this many will go search and buy it so hurry up) and look for the factory tach, cluster unit.... where I used to have a big gas gauge I have a 5k tach now.... LOVE IT...

    I got mine to my door for like $25 for a factory tach unit :bow:
     

Share This Page