Cracked Gearbox fill hole

[Antipodes4WD]

Returning to Toyota parts quality. I am not a monster, rather a small frame. I did not use any extender of a breaking bar. After changing oils yesterday I went under the vehicle to inspect for leaks. The gearbox fill hole was showing some oil. It was problemmatic before as well. So I was tightrning the plug and suddenly it went much easier. I reached for a stronger glasses and to my horror there is a crack. I have to say I reused the bottom plug to plug that hole because the plug that was there had the head pretty damaged, but otherwise they looked identical.


I think the vehicle is still driveable, I will put silicon over that, but any suggestion apart from a new gearbox installation? The vehicle is close to 400,000km.

 

[Shayne]

Get yourself a new plug and some JBWeld , a light coat of grease on the plug should prevent the JBWeld from sticking to it .

 

[Jon Wildsmith]

You should use a new crush washer each time, especially on aluminium casings. Makes a good seal without having to overtighten the nut.

 

[Towpack]

It may be possible to get it TIG welded. Find a good welder for his opinion. I've seen cracked motorcycle engine cases welded insitu.

 

[Shayne]

It's the filler hole so its not nearly as worrying as the drain plug .

 

[Antipodes4WD]

Get yourself a new plug and some JBWeld , a light coat of grease on the plug should prevent the JBWeld from sticking to it .

Thank you Shayne, epoxy did not cross my mind If Selleys does not hold, will try that. Otherwise in 4 years I will remove the plug, drill a 5mm hole in it, cut 6mm thread in it and silicon of glue it back. 6mm hole should be enough for my Chinese oil pump to fill the gearbox.

 

[Antipodes4WD]

You should use a new crush washer each time, especially on aluminium casings. Makes a good seal without having to overtighten the nut.

All washers are new copper, that hole was problemmatic before. Others do not leak. Should have used a plumber's tape