18rc head options

Discussion in 'Engine/Drivetrain' started by Bottle, Nov 8, 2017.

  1. Bottle

    Bottle Member

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    Hey guys, so my headgasket just blew on the 55 freeway in socal and it left me stranded 50 miles from home lol, but anyway i overnighted a headgasket rebuild kit and was wondering what head options i had incase the head was toast. I heard the 8r head may or may not bolt up to the 18rc intake and exhaust mani but im not sure. Resized_20171008_145557_8331.jpeg Resized_20171108_171627_1234.jpeg Resized_20171008_145557_8331.jpeg Resized_20171108_171627_1234.jpeg Resized_20171008_145557_8331.jpeg Resized_20171108_171627_1234.jpeg
     
  2. jetas

    jetas Grand Toyotaholic

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    Swap in a 20R or 22R
     
  3. Bottle

    Bottle Member

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    Do those heads bolt up to the 18rc block and manis? This truck absolutely has to run by Monday and I don't have an engine stand or lift or even a driveway to work on for that matter
     
  4. Dennis goeden

    Dennis goeden Enthusiast

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    8 rc head is a strait swap put one on my 18rc last year only difference i found is the compression ratio 9 to 1 on 8rc , 8 .5 on 18 rc dont quote me on the specs im close. look at my builds speaks for them selfs.
     

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  5. jetas

    jetas Grand Toyotaholic

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    Oh yea no. I meant swap in the whole engine. But since you need it asap then nvm.
     
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  6. Bottle

    Bottle Member

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    8rc or 8rc? thats the one i was thinking about, heard it had higher compression and maybe bigger valves. do you know what cars it came on? doubt id be able to find one new
     
  7. Dennis goeden

    Dennis goeden Enthusiast

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    pre 1973 Toyota crown , hilux found mine new in the original box on eBay shipped to the house $ 270 ish . so there out there. dont think you will make your time line . parts are out there but not always right when you need them. if i was to do it again i would follow jeta advise and go with a 22r swap parts are easy to get , and cheep er good luck
     
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  8. Bottle

    Bottle Member

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    Does 22r fit the 18rc mounts and bellhousing?
     
  9. Dennis goeden

    Dennis goeden Enthusiast

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    mounts should be same the pin hole may have to be moved simple fix pin hole is off set on 18rc state on others
     

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  10. Bottle

    Bottle Member

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    Well I just rebuild it this time. The goal is to put a 302 in it with the kit from northwest off-road anyway so I think I shouldn't put too much effort into this
     
  11. Dennis goeden

    Dennis goeden Enthusiast

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    take some picks of your a/c mounts for me please thank you
     
  12. jetas

    jetas Grand Toyotaholic

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    Be careful with those N.O.R mounts. They may push the engine up away from the frame rails and the engine might not fit under the hood.

    And the frame rails on the early trucks is super narrow
     
  13. Bottle

    Bottle Member

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    heres those AC pictures. i have that separate ac vents and fan under the dash made for the hilux. probably aftermarket. let me know if u need more. may be willing to sell whole thing too
     

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  14. Bottle

    Bottle Member

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    Found exhaust leak lol. took it apart and cleaned it up. good news is nothing is broken. cam has casting defects and cam bearings need replacement, but the valves are air tight and nothing is cracked. looks like the back cylinder leaned out and melted the gasket. meanwhile, the front cylinder was running rich. Dafuq? any ideas? i have a new weber 32/36 i just ordered a jet kit for, better to be on rich side. intake mani looks like someone attempted to port it, lol. gunna get some quotes from some machine shops for some work this week.
     

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  15. Dennis goeden

    Dennis goeden Enthusiast

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    would be in to the hole ac system. i have a good 18 rc head and cam set , if you need
     
  16. bigpanda16

    bigpanda16 Newbie

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    Any chance both you guys got any pictures of your combustion chambers on the 18rc versus the 8rc head?
    I'm assuming the compression difference is coming from the shape/volume in the head. Obviously there is a difference in piston bore but I thought they were both flat top models?... I've searched Google images and came up with nothing definitive
     

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