[Toyaddict]

I'm not sure how common this failure is but I thought I would document my fix. While cleaning my throttle body I noticed some dry powder like coolant around an aluminum plug.

After some searching I only found a few people who have had this happen. Atleast one of which had the plug come completely out and spray coolant. The thought of this bothered me, the price of a oem throttle body bothered me even more.

I decided removing the pressed in plug and tapping for a 3/8 npt plug was my best option. After putting the plug in with a bit of Loctite 567 I pressurized the setup to 25psi and it's holding beautifully. Hopefully this helps someone. The first picture shows the plug leaking under pressure.

 

[01tundraDC]

Very interesting. I wonder if this is where my slight coolant leak is/was. I haven’t cleaned the throttle body yet to find out. Did the timing belt and water pump a while back though and found a minor leak near the thermostat housing from a botched job by whoever did the first timing belt swap and assumed that was it. I’ve been meaning to clean the throttle body lately, so I’ll find out soon. Truck is running rough, owned it for 70,000+ miles and never cleaned it. It’s time.

The truck emptied the overflow tank in about 60,000 miles, so when I say slight, I mean slight. Not enough that I worried about it in the slightest, considering how small our overflow tanks are


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[rick4044]

I know this is an old post, but I just had this leak on the throttle body on a 2003 Sequoia. Coolant was shooting all over the place and the smoke was crazy! After an hour of google searches I stumbled on this and sure enough, that little round cap had come loose and was the culprit. I just ordered a used throttle body off ebay for 40 bucks instead of trying to do the repair. I plan on selling the vehicle soon, so I'm glad this was an easy and inexpensive repair.

 

[bstow83]

I know this is an old post, but I just had this leak on the throttle body on a 2003 Sequoia. Coolant was shooting all over the place and the smoke was crazy! After an hour of google searches I stumbled on this and sure enough, that little round cap had come loose and was the culprit. I just ordered a used throttle body off ebay for 40 bucks instead of trying to do the repair. I plan on selling the vehicle soon, so I'm glad this was an easy and inexpensive repair.

I just had this happen to my 2003 sequoia @244k and appreciate this post and the others for the guidance.

 

[Chappy R]

Sharing your experiences on this forum is ALWAYS valuable to someone down the road. Thanks to all who do. Chap

 

[BDiefAZ]

has anyone bypassed the coolant flow from the throttle body?