5VZ shaking at idle after install of new fan parts

I just installed a new fan, fan clutch, and fan bracket after the bracket bearing failed and caused all the belts to fall off when the fan/fan clutch/pulley assembly came loose. The truck now starts right up and stays cool, but there’s a noticeably rougher idle than before. It looks like the whole engine is shaking (see video below).

Could a mistake during install of said parts cause such shaking? Or is it more likely bad engine mounts?

I also don’t have any codes, and it idles right at 600 RPMs when warmed up..
https://youtube.com/shorts/W90Sv8KIMDI?si=NetpZns0u5tj45zO

 

how many miles are on this 5VZFE
original mounts still?
my rig is currently having some shakes as well, but is noticeable in the shifter stick in 5th gear at certain RPM range on the highway load on a recent rebuilt R150F
maybe the engine mounts, may not be the engine mounts on mine that are original at 356k of service
still under a DiY diagnostics...

 

250k; AFAIK the mounts are OG. Btw I do also have a driveshaft that’s too short that vibrates over 75 mph. I was waiting to exchange it at the driveshaft shop after installing the new springs I have.

 

Update - I am getting misfire codes now, along with a severe stumbling and hesitation when I accelerate. I’m hoping it’s just bad gas and I didn’t blow the head gasket when the fan came loose..

 

Do you remember the Full list of EVERYTHING you touched/removed/replaced during the install?

 

I don’t remember unplugging any sensors. All I did was move the plug wires out of the way.

 

Check that the electrical connections to the ignition coils are correct and fully seated.

 

When the belts came off, they could have torn wiring to nearby sensors. Unless the engine overheated, the head gasket would not get damaged from fan damage.

 

I didn’t notice any damage to any wires or coils, but I’m also not much of a mechanic so I could be missing something. I can’t be sure it never overheated, but temps seem normal as I’m driving around on the OBD2 gauge.

 

After doing some research, it seems like the only things that would affect only one side if the engine are 02 sensors, knock sensors, skipped timing on one cam, or a head gasket. Am I missing anything?

 

I’d reseat all the plug wires on both the ignition coils and driver side spark plugs. R Quadruple check the plug wire order while you do it too. Grab the wire and follow it from end to end and make sure it’s absolutely in the right order.
Maybe when you moved the wires out of the way you somehow managed to unseat all 3
Reseat the cam position sensor connector on the timing cover too.

If I had to bet on the cause, it would be something that you touched or got damaged during the fan failure or installation. The timing of a knock sensor or 02 going out at the same time as the fan is just too coincidental imo

It’s probably something really weird and minor you forgot you unplugged or something like that

 

Yea it also seemed unlikely I could’ve caused the timing belt to jump timing when I was fiddling around with it, but who knows

 

Yeah, double check. Always be suspicious of things you touch. Goes for all of us, mechanic or not. That said. Are you losing water? Checked plugs to see if one is TOO clean? I think the parts stores all rent enough tools to check both coolant system and compression. Not a bad idea.
I doubt this is a motor mount, sorry.

 

I did check them earlier and they all seemed to be seated solidly. Also doesn’t each coil go to two cylinders? So you couldn’t have 1.5 coils go bad and cause only one bank to miss then right? Also it seems like if the wires were bad, then both sides would have issues, not just 2, 4, and 6.

 

nah, you didn't do that without messing with tensioner.

 

I did check coolant, and it did appear to be right at the cap, maybe slightly lower, but it has been mostly sitting for a few months. No overheating or unusual pressure in the hoses. I will try to pull plugs and rent a compression tester when I can.

 

Maybe the fan or fan bracket bearing bumped into the tensioner when they failed and came loose?

 

Be nice to rule out HG, one way or another. Looks like misfires on video but it's just guessing why.

 

eh. Pretty unlikely. That would be one magic loogie.

 

It’s definitely possible. It could’ve overheated when I was driving it with the bad bracket and the belts had come off. Usually a bad HG will be a miss on one or maybe two cyls, but I suppose it’s possible to make three in a row misfire. I feel like that’d be a pretty catastrophic head gasket failure with a lot of coolant loss though, but I could be wrong.