Suzuki Samurai Toyota TwinCam





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  1. #1
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    Default Suzuki Samurai Toyota TwinCam

    Hi Guys , Im new to the forum so hello .
    I was wondering if anyone maybe has some suggestions or advice for me.
    I have a 1984 Sj Samurai with Toyota TwinCam 1600 16 valve engine in it , I am experiencing overheating issues with it in the bush and sometimes in standstill traffic.
    The radiator fitter at the moment is a Nissan 1400 with an electric fan in the front.

    My question is really has anyone fitted a bigger radiator for the SJ and if so what fits with the least amount of work or does anyone else have a similar set up to me ?

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    Default Re: Suzuki Samurai Toyota TwinCam

    If its overheating sitting at a robot and not while driving it seems either your fan is strong enough or the fan is kicking in to late...
    Remember these cheap fans you buy from spare shops are aircon fans and not radiator fans, invest in a good quality HD fan and make sure your thermo switch is working correctly
    A bigger radiator is always better... with the strong fan, also keep in mind when you in the bush there is no airflow thus the fan must do all the airflow

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  4. #3
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    Default Re: Suzuki Samurai Toyota TwinCam

    Quote Originally Posted by Navigator View Post
    If its overheating sitting at a robot and not while driving it seems either your fan is strong enough or the fan is kicking in to late...
    Remember these cheap fans you buy from spare shops are aircon fans and not radiator fans, invest in a good quality HD fan and make sure your thermo switch is working correctly
    A bigger radiator is always better... with the strong fan, also keep in mind when you in the bush there is no airflow thus the fan must do all the airflow
    Thanks a lot the thermostat has been removed by the previous owner, is there any good quality HD fan you can recommend i do suspect that the fan is kicking in a bit late.
    I was also thinking of putting in an addition fan in with a manual switch on the dash.

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    Default Re: Suzuki Samurai Toyota TwinCam

    Thermostat removal is not good practice. Remember the function of the thermostat is to circulate the cold water in the engine block when the engine is still cold and does not pass through the radiator and when the engine reaches a specific temperature it opens and water are pumped through the radiator.
    However, some engines when the thermostat is removed, the water are only circulated in the block as the thermostat also functions as a not return valve and stops the water returning to the engine block and are then forced through the radiator.

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  7. #5
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    Default Re: Suzuki Samurai Toyota TwinCam

    Replace the thermostat and get a proper high flow fan.

    The VW golf 82 degree thermo switch is a good choice.

    You can get good fans here:

    http://hot4cold.co.za/products/spal-electric-fans/

    http://hot4cold.co.za/products/radiator-fans/

    Davis Craig fans are used on plenty of high end vehicles.
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    Default Re: Suzuki Samurai Toyota TwinCam

    Go to Radiator King in Salt River, speak to Riaan.
    Always think: Could this be sarcasm?

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    Default Re: Suzuki Samurai Toyota TwinCam

    Quote Originally Posted by Shaydon View Post
    Thanks a lot the thermostat has been removed by the previous owner, is there any good quality HD fan you can recommend i do suspect that the fan is kicking in a bit late.
    I was also thinking of putting in an addition fan in with a manual switch on the dash.
    Your problem is that the thermostat has been removed. I've used the 4Age engine my Lotus 7 race car since 2000. The maximum size radiator you can fit into a Lotus 7 nose isn't very big so it's flow is critical. On the 16 valve motor the thermostat housing is not part of the block or head but loose and must be plumbed in correctly. The thermostat is closed when cold and water is recirculated into the water pump and block without going to the radiator. That's from the lower outlet of the thermostat housing. We plumb that pipe back into the back of the head where the heater system normally attaches. When the water is at the correct temperature the thermostat opens the outlet to the radiator and closes off the recirculation system. If you remove the thermostat from the housing the water will take the path of least resistance which is straight back into the block. If needed I can try digging out my diagram of the system and post it here.
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  11. #8
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    Default Re: Suzuki Samurai Toyota TwinCam

    Quote Originally Posted by Oppies3800 View Post
    Go to Radiator King in Salt River, speak to Riaan.
    I did first he put the current radiator in .....

  12. #9
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    Default Re: Suzuki Samurai Toyota TwinCam

    Thanks everyone great info here.

    Seems the general consensus is replace the thermostat and get a better fan.

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    Default Re: Suzuki Samurai Toyota TwinCam

    Quote Originally Posted by Shaydon View Post
    Thanks everyone great info here.

    Seems the general consensus is replace the thermostat and get a better fan.
    You must only use the correct thermostat and housing for that motor. On the fwd car it's mounted on the body of the car. Often the scrapyards don't sell it with the motor so guys don't fit it when doing a conversion.
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    Default Re: Suzuki Samurai Toyota TwinCam

    Quote Originally Posted by Paul#25 View Post
    You must only use the correct thermostat and housing for that motor. On the fwd car it's mounted on the body of the car. Often the scrapyards don't sell it with the motor so guys don't fit it when doing a conversion.
    Thanks i will do, are they easy to find or do you need to look ?

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    Default Re: Suzuki Samurai Toyota TwinCam

    also be very sure about the direction your fan is blowing. Have seen guys accidentally connecting it the wrong way around. Must flow front to back.
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  16. #13
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    Default Re: Suzuki Samurai Toyota TwinCam

    Quote Originally Posted by Shaydon View Post
    Thanks i will do, are they easy to find or do you need to look ?
    Phone around to scrap yards to look for one or you could get one from Toyota. The guys that import the motors from the east might also have. I mounted it just behind the water pump with a short section of rubber hose and then brackets to the side of the block.
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  17. #14
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    Default Re: Suzuki Samurai Toyota TwinCam

    *Update*

    Installed a better fan over the weekend has made a significant difference still trying to source the housing for the thermostat.

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