Valley plate (Heat exchanger) warping.

[silverhorse]

I Assume you have figured this out by now but the OEM gasket is not the problem. It's the heat exchanger warping. has anyone come up for with a solution for this? Is anybody making a thicker flanged exchanger?

 

[CanadianRockyCruiser]

I Assume you have figured this out by now but the OEM gasket is not the problem. It's the heat exchanger warping. has anyone come up for with a solution for this? Is anybody making a thicker flanged exchanger?

Are you referring to the valley plate?

 

[silverhorse]

Correct

 

[lx200inAR]

I assume by gasket you mean the Toyota FiPG.

There is a recent thread where this is being discussed. Someone is making a aramid paper gasket to replace the FiPG. It’s mentioned in that thread that the flimsiness of the valley plate is a big part of the problem.

Thread 'J2Hundy Valley Plate Leak Guard Seal'
J2Hundy Valley Plate Leak Guard Seal - https://forum.ih8mud.com/threads/j2hundy-valley-plate-leak-guard-seal.1354286/

 

[silverhorse]

Thank you for the input! There is a video out by an OEM Toyota mechanic who says The Valley plate warpes. And so he replaces it every time this problem occurs.

 

[TeCKis300]

Nothing is ever so rigid that things don't flex and move. Add heat and there's a natural expansion and contraction cycle. This is where engineers make the big bucks on managing this over an engines lifecycle.

This is where fancy seals and gaskets earn their keep. I would follow Toyota's lead on this and re-seal with the proper Toyota 1282B(ThreeBond) FIPG. I look at it as maintenance if it's every 200k between re-seals.