TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

That’s clean living, congrats on your new family member. I’d be lying if I said I wasn’t envious, severely overpopulated here now and sometimes I feel like Charleston Heston in the Omega Man if you catch my drift.
There’s nothing like a furry friend to make you smile. Ours is little Plato, I like to say he’s my wife’s furry son, as opposed to our big burly one who served as a Marine in Kabul.
Good luck with her, she’ll certainly be a friend for life.

 

thanks y'all for checkin' it out! once i have this lil hay burner figured out ill mod on!

 

Well boys I think my motor gave up the ghost. Anyone here know of any shops they trust in the socal area to rebuild a 1gr?

 

Uncool!

what happened?? It might be a lot cheaper to get a used motor vs rebuilding to be honest. I’d trust a used motor and Toyotas machining/assembly over most “machine shops” and replacement parts. That is unless you are going with quality aftermarket upgrades for the internal vs. budget oe replacement stuff.

 

I’m not really sure. I was cruising and all the sudden I started hearing a weird squeak type sound, I went to pull onto a side street and the exhaust sounded loud and horrible then truck died. It starts right now but barely, and it sounds awful. I thought it was the supercharger but I just spun it by hand and it seems fine. It did start to throw the supercharger belt off the crank pulley.
I don’t think I have the funds to do a fully built motor at this time so maybe I will try to find a healthy used motor. I am going to try to tear down further and see if I can turn the engine by hand or if its locking up like I think

 

I try and diag first. What's the oil look like? Does it turn over?

 

Turns over with a lot of resistance then gets smooth. My upgraded lower supercharger stud is snapped so that is gonna be fun to extract

 

Some of that is normal. Remove the spark plugs and THEN try to turn it over. Inspect oil and coolant and then go from there.

 

Ok motor is fine. This was the issue. I guess upgraded studs dont fix the problem fuck my life.

 

I guess motor was hard to turn because the serp belts were wrapping around some of the pulleys locking up the engine.

 

Which sc tensioner are you running? Glad your motor turned out to be okay. That will be a big headache still, but glad it wasnt worse

 

I was shitting bricks dude. Idk why it was making it sound so weird I guess the motor was trying to fight the the pulleys being locked up.. Stock tensioner. I am thinking I might buy a stock tensioner just in case thats the issue. It seems this is a semi common issue but no one really knows the cause or fix.

 

My heart hurt for you when I read your first message. From the look of your sc crank pulley it looks like maybe the lower sc idler was riding directly on it for a little bit. Interesting that the stud still sheared with the stock tensioner and upgraded studs. I noticed recently when I had mine apart to replace idler bearings, that the bottom stud is under all kinds of force in two different directions. The stock belt has an idler that rides on it and puts force on it one way, and then the SC idler pushes in the other direction. I wonder if this has something to do with these stud failures. Seems almost like the metal is fatiguing over time until it gets brittle and snaps

 

I was pretty bummed haha. I am sure that is a factor, this stud didn't even make it like 2000 miles though so I am not sure why it snapped so soon. I'm just glad that the motor and supercharger are ok. RIP my scol lower pulley that thing took a beating. It's not pictured but it's 100% done. The sc crank pulley could probably be reused but I'll probably just get another one.

 

That is odd. Anything else look like a smoking gun?
Makes me wonder if the stud wasn’t more of collateral damage due to forces rather than the root cause of the chaos.
Anything is possible, but 2k miles on the new stud when the stock weak ones are lasting 10s of thousands with more studs being ok than not… granted a few concentrated cases in this forum.

 

Locked up bearings are capable of causing large amounts of untold collateral damage. It doesn't matter how strong a stud is, when it is under the sheer force it is and a bearing is preventing things from moving it will easily add ten times more load onto that stud and make it snap like a hot knife through a cold stick of butter.

Dude I'm really glad your engine didn't go buh bye, but it does suck that you're going through it. To everyone else. I guess all I could say is be prepared to do some major work at some point on your stuff. It's not really an if, but more of a when at this point.

 

I checked all the bearings and everything still feels buttery smooth like brand new. I really wonder wtf causes this issue. I mean we can’t say for certain its the studs right? Technically mine could be a one off issue with the upgraded ones. But it seems to have failed in the same exact spot as all the others. My brain is done thinking for the night about it lol.

Me too. As much as this also sucks, my mechanic buddy I was on the phone with at the time had me thinking the worst. As soon as I cracked that upper stud nut loose and saw the whole assembly move I was like oh no way. Then I was just praying that was the cause lol.

 

My guess is your belt broke/jumped and that’s what ended up causing most of the damage.

 

Very plausible.

 

You are very fortunate. This is much friendlier on the wallet than a new engine.