New Coolant Bypass Still Leaks!

Hi, maybe someone can help me here. I stayed up late last night replacing the coolant bypass on my 08 2.7 and it is still dripping. Its tightened down well and the parts I used are 16258-17021 (gasket) and 16268-75110 (pipe). I'm aware there are two variations of this pipe however from what I've read in other posts, both will work. At this point, would the best course of action be to remove the gasket and use grey Permatex (or perhaps something similar based on someones suggestions?) Thank you!

 

Was the pipe metal or plastic?

 

Maybe check that you have the right gasket?
I don’t see that part # as being one for the pipe?

See here for details.
https://www.tacomaworld.com/threads/leaky-gasket-on-coolant-bypass-housing.417873/

 

Looks like you got the wrong gasket.

This is the gasket:

 

I’ve had leaks due to new parts not being truly flat. So I always put a straight edge on it to check it first. If not true, some very fine sandpaper on a flat surface, then I do a figure 8 motion. Remove as little material as possible, evenly. You don’t want to end up with a ramp shaped piece.

If it’s horribly bad, take it back for a new one before trying to fix it.

It happens far more often than it should. Even with new brake rotors, I’ll get them lightly cut for my work truck. Every new rotor for it has been untrue. The last brake job was done by a shop, they didn’t do it so I have steering wheel wobble.

 

Thanks for the responses guys. @Jimmyh , given thats a Toyota part and not some aftermarket equivalent, I'm guessing you're right. @Waasheem , I'll give that a try in conjunction with sealant. Thanks

 

Ordered the new gasket. I'll just keep an eye on the coolant until then I guess!

 

If it’s your daily driver, and it’s just a slow drip you should be fine. Keep a bottle in the truck, top it off before you leave to work and before you head back home.

I’d suggest you test for electrolysis. Google it, simple to do. If refilling with coolant and water I’d suggest using distilled water. It has less impurities and leaves less deposits.

 

Hylomar (red is especially made to resist coolant - though I understand blue is still good).