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Old 08-13-2018, 01:32 AM #1
PTPT2002 PTPT2002 is offline
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Coolant hose under the intake manifold leak - 2004 4RUNNER V6

I have a 2004 V6 4runner SR5 with about 200k miles now. I noticed recently that one of the small hoses is leaking a bit of coolant (see attached picture). It is leaking from the one under the throttle body.

Browse a bit and found GGeezer's video that shows how to remove the throttle body to get to the the 2 coolant hoses.

How to replace Coolant By-Pass Hoses

Do you know what size of a hose i need in this application? The local Autozone carries both 5/16" and 3/8" transmission coolant hoses but i am unsure which one to use. Would i be better off getting OEM since these hoses since the hoses seem to have a slight curve to get to the throttle body?
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Coolant hose under the intake manifold leak - 2004 4RUNNER V6-engine-coolant-leak1-jpg  Coolant hose under the intake manifold leak - 2004 4RUNNER V6-engine-coolant-leak2-zoomed-jpg  Coolant hose under the intake manifold leak - 2004 4RUNNER V6-engine-coolant-leak3-looking-left-side-jpg 
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Old 04-10-2021, 12:32 AM #2
k1ng_Snoopy k1ng_Snoopy is offline
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If you don’t mind me asking what size hose did you end up going with? Currently having same issue after changing water pump
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Old 04-10-2021, 08:16 AM #3
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Trim off 1/2” from the end and use a worm gear hose clamp. Done!

If you want to buy a new hose, buy both sizes and use the best fit. It’ll set you back all of $5 for 2’ of radiator hose.
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Last edited by Drcoffee; 04-10-2021 at 08:18 AM.
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