TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

Any possibility the T-stat is backwards? Not joking or demeaning, just trying to troubleshoot.

 

im not sure either. The first thing that came to mind for me was a possible radiator blockage, but i cant explain why it only fills it up after driving on the highway for extended periods of time. Drove it to work this morning on country roads and it hasnt filled up any more than where the level was last night.

I dont think so... i am gonna take another look at that this weekend, but i think it wouldve presented itself as a problem already as ive put 2k miles on the tstat since install. I am considering just reinstalling my toyota 180* this weekend to rule that out as a variable as well. When i swapped the tstat though it was pretty straight forward. Pulled the old one out, and installed this one, not nearly as involved as doing the tstat on the 1GR

 

If it's only on the highway @BassAckwards I would suggest replacing the thermostat again and if the issue persists you should investigate the radiator fan or the actual radiator assembly itself is blocked.

 

Hmm must have been someone else then haha. It’s an old thread I will have to go back and see if I can find it.

 

Copy that, ill throw the 180* back on and see what happens, and then move onto the radiator. Any troubleshooting tips for figuring out if there is a radiator blockage?

 

I always thought that if the fan clutch was on its way out, that things would stay cool on the highway (more airflow, so fan not needed) and then once you got off, then itd start overheating. Does this sound right?

 

Not really. you could run a hose through the upper and lower and see how much output you have, but that is really not indicative of anything because you have flow but the issue is only happening at speed. I used to have an old Mitsubishi that would only partially overheat on the freeway wish I narrowed down to being an issue in the design of the radiator, so I ended up upgrading to a dual row radiator and all of the cooling issues went away. Just make sure your thermostat is good and then check your fan clutch both wow cold and while the engine is up to temperature and if that nets you could results then you likely have a partially clogged radiator. How many miles do you have on it out of curiosity?

 

About to roll over 264k miles

 

I would love for this to be just a clogged radiator issue, but im bracing myself for the worst

 

HOLY CRAP! Okay... Well, in that case it is HIGHLY likely you have a blockage. Just do what we have already discussed and let us know. If they nets less than stellar results, cylinder leakage test time.

 

With that sort of mileage, anything is possible.

The thing that gives me hope is that it is only a highway thing.

 

Touch the lower radiator hose. If it is considerably colder, then your fluid isn't circulating.

Once the engine is up to temp, watch the overflow container. Have someone rev the engine. Look for repeated bubbles...

 

FTFY

 

I have checked the lower rad hose after its up to temp and it is noticeably cooler. Would this indicate a radiator blockage or a faulty water pump?

i will have someone rev the engine so i can check for bubbles later this evening and keep yall posted

 

maybe a bath of CLR for the radiator?

 

If i can determine that the radiator is in fact the issue, id feel good about using this as an excuse to upgrade to the CSF. I might pull that all out this weekend and see how everything looks and flush it out and clean it up with something like you mentioned. Definitely dont want to spend the money if it isnt gonna fix the issue though, so im gonna have to be sure that's the problem somehow

 

No it would indicate a bad thermostat.

Both hoses need to be around the same temperature. Are you running the Motorad 170?

 

Gotcha, so im guessing that would mean it's not opening up or only partially opening? Yes i am running the motorad 170*. Bought from autozone, but made by motorad

 

That's more of the reason why I never personally liked Motorad stuff. I don't trust them. Yes it is not opening or partially opening. Replace it back with OE and report back to us.

 

So my main intercooler pump failed sometime between yesterday and a couple of months ago when I switched back to winter coolant. I kind of noticed it by accident, and now I'm a little happy that I procrastinated on going boosted again. The second pump still works but it's a slightly smaller pump so it doesn't flow as fast as the main one would on its own.

Did some diagnostics and it seems like something internal to the pump. The wiring and fuse is fine. So, new pump for me prior to putting the supercharger belt back on.