Hey guys im in progress of doing a swap from a stock b18a to a stock b20b(high comp). I've ran into a little problem regarding some sensors, and switches. My first problem is that the b18a has a total of 3 switches/sensors (oil pressure switch, thermostat switch, thermostat sensor) left of the oil filter. The b20b only has a oil pressure switch. Another problem i seem to encounter is that the b18a has a breather chamber, while the b20b doesn't. Basically what im asking is what should i do with the thermo switch, and sensor. And what should i do with breather chamber..

Ive searched but no luck.. Any help would be appreciated.

 

I installed a b20b into my 92 Teg a few months ago...

You wont use the thermo switch. It wont throw any codes (least it hasnt on mine) and wont affect your motor. That sensor is basiclly for USDM motors only. JDM motor dont have them. The breather chamber shouldnt be an issue for you either. I just hooked everything back up where hoses shoudl go and the motor fired right up, ran fine and i drove it for awhile that night.

 

I'd definitely do sommore reasearch on the sensors.

 

 

Thanks HondaPartsHero, I have the wiring all connected. I just had to extend the thermo fan switch(coolant) to the proper place on the b20. which is right next to the b20b's thermostat housing. As for the breather I just routed the hose from the manifold, to the pcv which i placed on top of the valve cover.

 

love the swap, what wiring did you use, i also have a 91 da

 

? i see and understand what u posted allready rewired the coolant sensor to the thermostate area sensor(figured that one on my own) but in refrence to the black circle (thermal fan switch) i have a 91 teg still running obd0 swapping in a jdm b20b on the b20b block there is the big bolt plug wont i need to pull the plug on b20 and just install the b18 plug with the provision for the sensor or is it trully not needed considering im still running obd0 i guess this is kinda a dumb question i just didnt know if it was needed to run the obd0 system