RL1076 2F SNIPER THERMOSTAT HOUSING MODIFICATION FOR SNIPER TEMPERATURE SENSOR – TOYOTA LAND CRUISER
At Red Line Land Cruisers, located in Colorado Springs, we continually push forward on the Holley EFI “Sniperization” of F & 2F Toyota engine development!
We’ve recently discovered that some of you are crossing your fingers and “cross-threading” the Sniper Coolant Sensor NTP threads into the Toyota 2F Coolant Drain, which is a BSPT threaded port. Maybe you are sealing it with some super-sealant or “gorilla-torquing” it to “permanently-sealed” status. While the “cross-threaded-way” may be a “fix-it-&-forget-it” backyard solution, we built a serviceable system.
Toyota Land Cruiser cylinder heads come in “two flavors!”
Why does this matter? Toyota Land Cruiser cylinder heads come in “two flavors,” 2-Port and 3-Port heads across the range of 60-Series Land Cruisers. When adding the Holley Sniper System to your 60-Series, the head unit is equipped with an electronic water temperature sensor. If the cylinder head is the 3-Port design, use our 2F/F Reducing Bushing (included in the pull-down option) for the Holley Sniper Coolant Temperature Sensor and disregard this Thermostat Housing Modification. But, if your FJ60 2F Cylinder Head is a 2-Port design, you can use our RL1076 2F Modified Thermostat Housing to have a location suitable for the Holley Sniper Coolant Temp Sensor.
Let’s start with the question, “How do I know what type of cylinder head I have?” The previous owner said it’s “all original,” but how do you verify that your motor is not Frankenstein’s cousin? Here is the “quick-vis-guide.”
IDENTIFY: WHAT CYLINDER HEAD DO YOU HAVE
If your 2F FJ60 Cylinder Head is a 2-Port design, we’ve modified the lower thermostat housing so you can install the Holley Sniper Coolant Temperature Sensor.
Lower Thermostat Housing Modified for Sniper Coolant Sensor
The coolant and block stay the coldest and the longest at the Coolant Drain location as the drain is below the combustion line and reward on the engine. But as the engine becomes heat-soaked, this portion of the block is the hottest.
A better way for the Holley Sniper Coolant Sensor to take water temperature readings
The 2F engine thermostat is located within the thermo-housing and is positioned up at the front of the engine between the block and cylinder head. Water flowing through this area changes much quicker than within the block itself. This is where Toyota set up the water temperature monitoring via the Thermostatic Vacuum Switching Valve (TVSV) for the carburetor to adjust for cold start parameters and normal running conditions. As electronic fuel injection is even more critical for monitoring temperatures, it is crucial to monitor coolant conditions as best possible; thus, why not do it where Toyota deemed it essential?
Red Line Land Cruisers provides the easiest bolt-on solution with a Thermostat Housing modified for the SNIPER Temp Sensor for the EFI conversion of your 2F engine in your FJ40/60 Land Cruiser.
Hardware Included as the factory bolts will be too long and bottom out when using the RL1076 housing.
Since you will be removing the Upper and Lower Radiator Water Housings, you may change your thermostat and gaskets! Again, you want to give your 2F engine the very best chance of being as solid and reliable as possible when doing the 2F Sniper Conversion!
OPTIONAL ADD-ON KIT IN THE CHECK-OUT PULL-DOWN:
• 90916-03014 THERMOSTAT
• 90430-40058 GASKET, THERMOSTAT
• 16341-60020 GASKET, WATER OUTLET
• 16343-60011 GASKET, WATER OUTLET HOUSING (discontinued: 16343-60010)
See all of our FJ 2F SNIPER accessories:
FJ60 2F SNIPER Accessories: https://redlinelandcruisers.com/product-category/60series/fj60-2f-sniper-kit/