Throttle Body Heater Bypass

jafir

Well-known member
May 4, 2011
1,628
0
Northwest Arkansas
This is one of those arguments that is like politics. Both sides KNOW they are right, and there is no convincing, so why bother to even try? Whether you should let you car warm up before driving it, or drive it right away is another good one.
 

Serg911

Well-known member
Jan 21, 2006
72
0
I just replaced my tb heater plate, but considered the option of bypassing it. simple fix, but I still don't see the value of having it. The Discovery engine compartment is always so damn hot, that I doubt "freezing" would occur. What's next, a heating unit for the catalytic converters?
I'm not making any recommendations either way, but seriously, how many cars on the road have such technology? when's the last time any of you heard any other vehicle having its throttle freeze?
 

rovercanus

Well-known member
Apr 24, 2004
9,651
246
Serg911 said:
I just replaced my tb heater plate, but considered the option of bypassing it. simple fix, but I still don't see the value of having it. The Discovery engine compartment is always so damn hot, that I doubt "freezing" would occur. What's next, a heating unit for the catalytic converters?
I'm not making any recommendations either way, but seriously, how many cars on the road have such technology? when's the last time any of you heard any other vehicle having its throttle freeze?
I've had my throttle body freeze when it was bypassed.
 

brushogger

Well-known member
Sep 9, 2010
286
0
Years ago, I had the carb on my old FJ40 freeze up when I lost the heat riser after the header install. Remember, they never freeze shut- they freeze open!. I made an intake manifold heater for it after that happened. Pretty much like a large version of a rover throttle body heater.
 

bmxer06pa

Well-known member
Mar 8, 2010
300
0
Just replace the gasket. I am sure you have spent more time reading this thread than it would take to do the actual work. It took me about 15 mins to change mine.
 

jeepeater

Well-known member
Dec 20, 2005
128
1
39
kentucky
it seems that a gasket wont always fix the leak. the plate does warp over time due to thermal expansion and contraction. the center bolt on the front of the plate near the inlet and outlet cause the outer edged to warp away from the throttle body overtime. hand filing the plate flat again and a new gasket will solve the issue, or replacing the plate. either way, the warping of the plate needs to be addressed.
 

KyleT

Well-known member
Mar 28, 2007
6,059
8
39
Fort Worth, TEXAS
GoodJava said:
Bypassed that sucker years ago. Numerous mtn/snow trips since no issue. Horribly designed from the get go.

actually, you would be suprised, it has nothing to do with snow or iat below freezing....
 
Mar 9, 2006
14
0
2001 Disco II SE7
170,000 miles

12F degrees this morning and my throttle stuck on my way to work. About 3 weeks ago i had a pin hole spray coming out of the throttle body heater gasket. i decided to bypass it temporarily until i got a new one ordered.

this morning the rpm?s wouldn't back down as i approached a red light. While applying the brakes, i put the truck in neutral, hammered the pedal a couple times to "unstick" it, but it just pegged it even higher. i turned the truck off, coasting to the side of the road. popped the hood, yanked on the throttle cables a few times. it started and ran fine after that, but i'll be ordering one tonight.

Perhaps not an issue in a warmer climate, but not the Iowa winter tundra i live in.
 
2000 DiscoIowa said:
2001 Disco II SE7
170,000 miles

12F degrees this morning and my throttle stuck on my way to work. About 3 weeks ago i had a pin hole spray coming out of the throttle body heater gasket. i decided to bypass it temporarily until i got a new one ordered.

this morning the rpm?s wouldn't back down as i approached a red light. While applying the brakes, i put the truck in neutral, hammered the pedal a couple times to "unstick" it, but it just pegged it even higher. i turned the truck off, coasting to the side of the road. popped the hood, yanked on the throttle cables a few times. it started and ran fine after that, but i'll be ordering one tonight.

Perhaps not an issue in a warmer climate, but not the Iowa winter tundra i live in.

Parts are in stock and ready to ship.

There has never been a better time to buy!
 

JohnB

Well-known member
Oct 18, 2007
2,295
12
Oregon
I may throw a kit on it eventually but almost 4 years bypassed. I was doing a coolent flush last weekend and realized that when I bypassed it I used an old fuel pipe that was in the shape of a U. The U goes around the old throttle heater connections. I think it may be working almost the same way or at least in a small way. So I think I am half bypassed.:victory: or half baked. Your call