Ok so I know many of you have seen diy's on how to bypass the throttle body by connecting the two coolant lines. I had done that a long time ago but never got around to completing the bypass. This weekend I walnut blasted my intake valves and in doing so had to remove the intake manifold. Therefore I took the opportunity to remove the coolant lines and bypass the intake manifold as well. Intake temps are plenty high enough already so there is no need to have hot coolant running through the throttle body or the intake. You will need about 3 ft of 3/8 heater hose. Silicone if you want. The coolant ports measure about 1/2 inch but I found the 1/2 inch heater hose to be somewhat loose and it concerned me so I went with the 3/8. It will require some lube to get it on but they will be nice and snug.
You will also need hose clamps for 3/8 tubing. Lastly you will need a variety pack of vacuum line caps. They must include 3/8 and 1/2 inch. I suck at these posts so please forgive me that the pictures are at the end of the post. They are in order based on the diy. Wherever there is a gap between paragraphs refer to the pictures below.
Before I continue let me go ahead and say I am not including a diy on how to remove the intake manifold. It is a huge PITA that requires a lot of steps, loss of some coolant and getting into tight spaces. I have however provided a link to the repair procedure for the intake manifold. One word of advice. It is best to have a 1/2 inch vacuum cap handy when you remove the coolant line at the thermostatic plate so you can plug it immediately to keep coolant from leaking out. You will have to bend the lines up going into the throttle body to keep them from leaking. Once you finish this part take a deep breath and relax a bit because the hard part is out of the way.
https://v.gd/xvtsm
Once the intake manifold is removed you will see a coolant line that runs from the side of the engine block to the throttle body and another coolant line that runs from the throttle body over to the back of the intake manifold. Lastly you will see a final coolant line that runs from the back of intake manifold down to the thermostatic plate above the oil filter.
You want to remove all these lines. Once again like before when you remove the coolant line from the side of the engine block you will need to plug it immediately with a 1/2 inch vacuum cap. Once removed you will grab your heater hose and clamps. You want to measure and cut the hose so it runs like in the picture.
Remove the vacuum cap from the thermostatic plate first and insert one end of the heater hose with the clamp around it while keeping the other end up high. This way you won't lose coolant. Then route the heater hose up to the side of the engine block. Make sure it is tucked tightly against the block and around the starter so there is enough room for the intake manifold. Remove the other vacuum cap and insert the heater hose with the clamp around it. Tighten both clamps and you are all set.
https://s2.ezgif.com/save/ezgif-2-c5770530a519.gif
Now you will want to use those same 1/2 inch vacuum caps to plug the two ports in the back of the intake manifold.
Then you will use the 3/8 vacuum caps to plug the ports on the throttle body.
Now all you need to do is put everything back together!!!
You will also need hose clamps for 3/8 tubing. Lastly you will need a variety pack of vacuum line caps. They must include 3/8 and 1/2 inch. I suck at these posts so please forgive me that the pictures are at the end of the post. They are in order based on the diy. Wherever there is a gap between paragraphs refer to the pictures below.
Before I continue let me go ahead and say I am not including a diy on how to remove the intake manifold. It is a huge PITA that requires a lot of steps, loss of some coolant and getting into tight spaces. I have however provided a link to the repair procedure for the intake manifold. One word of advice. It is best to have a 1/2 inch vacuum cap handy when you remove the coolant line at the thermostatic plate so you can plug it immediately to keep coolant from leaking out. You will have to bend the lines up going into the throttle body to keep them from leaking. Once you finish this part take a deep breath and relax a bit because the hard part is out of the way.
https://v.gd/xvtsm
Once the intake manifold is removed you will see a coolant line that runs from the side of the engine block to the throttle body and another coolant line that runs from the throttle body over to the back of the intake manifold. Lastly you will see a final coolant line that runs from the back of intake manifold down to the thermostatic plate above the oil filter.
You want to remove all these lines. Once again like before when you remove the coolant line from the side of the engine block you will need to plug it immediately with a 1/2 inch vacuum cap. Once removed you will grab your heater hose and clamps. You want to measure and cut the hose so it runs like in the picture.
Remove the vacuum cap from the thermostatic plate first and insert one end of the heater hose with the clamp around it while keeping the other end up high. This way you won't lose coolant. Then route the heater hose up to the side of the engine block. Make sure it is tucked tightly against the block and around the starter so there is enough room for the intake manifold. Remove the other vacuum cap and insert the heater hose with the clamp around it. Tighten both clamps and you are all set.
https://s2.ezgif.com/save/ezgif-2-c5770530a519.gif
Now you will want to use those same 1/2 inch vacuum caps to plug the two ports in the back of the intake manifold.
Then you will use the 3/8 vacuum caps to plug the ports on the throttle body.
Now all you need to do is put everything back together!!!
