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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Driver side oil cooler outlet help. Silicone Cap or replace with plug ?

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Old Apr 14, 2026 | 09:18 PM
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Jose Pena's Avatar
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Driver side oil cooler outlet help. Silicone Cap or replace with plug ?

89 v6 manual 2wd
Hey guys trying to cap or remove the driver side coolant outlet. Motor installed and looks like the engine mount blocks a socket from going fully in. Unless I cot a socket half way yo try to remove.
im having a hard time getting a socket on it. 17mm I believe.
Would a silicone cap work? Would a 3/8 silicone cap work and be done with it
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Old Apr 20, 2026 | 11:04 AM
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This is the coolant outlet attached to the water pump or the block? If yours had an oil cooler from factory it’s a good thing to keep/replace. I’ve been told it does a noticeable amount of help if you have a tired radiator.

If youre talking about the block port and can’t get it unscrewed, I don’t see any reason capping and hose clamping shouldn’t work. I have one on a 3.0 water pump right now. Temporary fixes are the best permanent ones.

The one that fit on the water pump outlet is 7/16” or abt 11mm. Hopefully that helps and the block one is same size.
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Old Apr 21, 2026 | 05:58 PM
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Originally Posted by livergang
This is the coolant outlet attached to the water pump or the block? If yours had an oil cooler from factory it’s a good thing to keep/replace. I’ve been told it does a noticeable amount of help if you have a tired radiator.

If youre talking about the block port and can’t get it unscrewed, I don’t see any reason capping and hose clamping shouldn’t work. I have one on a 3.0 water pump right now. Temporary fixes are the best permanent ones.

The one that fit on the water pump outlet is 7/16” or abt 11mm. Hopefully that helps and the block one is same size.
Thanks for the reply. Theres not much room for a socket to fit. I actually bought a silicone reinforced cap 3/8
I had to fight it to get in. I heated it to make it easier and also used dish soap. Hope this holds for now.
I need to figure out a way to remove it. Maybe a L shape wrench or cut a socket in half or a thin wall socket. Idk eally.
anyone removed this with engine installed.

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Old May 10, 2026 | 06:09 PM
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Hey guys. I finally got that outlet off. I used a crow foot wrench. It was not easy since there is not much room in there. Little by little got it off. I already ordered the plug from a toyota dealer.
part number is Part number 90344-53015 for plug
Once i get it ill post
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