258

  1. TSB8C

    258 I6 Manual Transmission Vacuum Diagram

    258 I6 Manual Transmission Vacuum Diagram
  2. CJ

    AMC 258 Aluminum Valve Cover Install

    AMC 258 Aluminum Valve Cover Install
  3. CJ

    MC 2100 Setup for 258

    MC 2100 Setup for 258
  4. CJ

    258 CID 6 Cylinder Service Guide

    258 CID 6 Cylinder Service Guide
  5. CJ

    150 CID 258 CID General Service and Diagnostic Guide

    150 CID 258 CID General Service and Diagnostic Guide
  6. CJ

    49 State 258 2V with auto trans and standard cooling vacuum routing

    49 State 258 2V with auto trans and standard cooling vacuum routing
  7. CJ

    CA 258 2V with manual trans and standard cooling vacuum routing

    CA 258 2V with manual trans and standard cooling vacuum routing
  8. CJ

    CA 258 2V with auto trans and standard cooling vacuum routing

    CA 258 2V with auto trans and standard cooling vacuum routing
  9. CJ

    4.0L 258 cid Head Conversion

    4.0L 258 cid Head Conversion (2 Files)
  10. B

    258 white smoke, over heating, gas in oil?

    I bought a CJ5 in an attempt to become more mechanically inclined! This CJ is a bit of a mess w/ an incomplete wiring, no gauges, and unknown other issues but it ran when I purchased it. Being a novice i have let it sit for a couple years only running it a few times. Recently it started...
  11. 7

    Carb/Manifold/Header Setup 258

    Restoring my 1980 CJ7 and want to upgrade the left side of the engine a bit. Original 258 overhauled by a professional shop and cam upgraded to a Comp Cam X4250H. After surveying as many threads as I think I can absorb, here's the setup I'm considering and would appreciate constructive feedback...
  12. L

    258 Misfire

    I finally got around to putting my engine back together after a few valves seized and bent a few pushrods on its maiden test run after sitting for a decade. I had a valve job on the head completed(decked 0.010) and installed a new comp cams 262 cam and double chain timing set. I pulled some...
  13. J

    AMC 258 knocking

    Hi I have a cj7 with a 258 AMC i brought this last year as a project and have finally got it going but is has a knocking/tapping noise! Iv had the rocker cover off but all seems good with the push rods and rockers so I did the trick of listening with a screwdriver to work out where it was coming...
  14. J

    Looking for T14 parts or trans

    Anyone have an old T14 laying around. I need a cluster gear and input shaft. Would be interested in your parts or buying the whole transmission. If the trans is in good shape that would be even better 🤘 Tks everyone!
  15. H

    79 cj5 258 valve cover

    Just purchased a 1979 CJ five with the 258 engine and a four-speed transmission. It is leaking oil very bad, so I am hoping to replace the valve cover with a new one as well as gaskets. Searching the Internet and I cannot find any valve covers for a 258 that are not for the year 81 or after. Is...
  16. H

    79 cj5 258 valve cover

  17. S

    258 Engine Rebuild Kits

    Who makes the best/economical 258 Engine Rebuild Kits? The engines got a hole in the #3 piston. Previous owners said a spark plug let go and somehow holed a piston. I’m not sure the cause because I haven’t investigated yet. My plan is to yank the engine out and investigate damage and tear...
  18. Basod

    258 Main and connecting rod bearings

    First is it a fools errand to think new lower end bearings with new oil pump will solve hot idle pressure of 12-15psi? Second FSM states factory bearings are color coded- anyone that can vouch the color is still present after 35yrs. No markings on the block to indicate over/under sized crank...
  19. F

    258 not happy with the Holley.

    Not sure where I left off but I got the Jeep back together after rebuilding the carb and getting a new distributer module and a new coil. The Jeep has never been happy with this carburetor but I just get different new problems every time I try something new. When I rebuilt it I found out what...
  20. JeeperChris

    258 Intake Manifold Gasket

    First I have two questions I need help with, then I will write up the story for those who are interested in what happened, because, well you know, it's a Jeep so there's always a story... No1: Does the intake manifold gasket go on dry? I remember smearing a bit of blue silicon on the old...
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