Overheated causing 3 other problems

[Dathaeus]

For what it's worth, I overheated my M54 for what must have been several minutes or so 4 years ago. Needle was about to touch the red zone (or possibly had already touched it, hard to remember).

After that happened I replaced every single piece in the cooling system because I couldn't figure out what was wrong. I think the culprit was the fan unit, which I also replaced, but I never bothered to confirm that. I was just happy that I was able to fix it.

Over 50k miles later the engine is still fine and pulls hard with no issues. I've done track days, autocross, uphill/downhill touge, everything you could imagine.

Ya my mobile mechanic was hopeful after listening to the engine but no comment necessary on that...

I'm putting every penny into cryptocurrency these days and it'll crush me to have to take a couple grand out of my investments just when they are about to moon...

But as they say, it's never a good time to have to do major work on your car right...

[t.er]

For what it's worth, I overheated my M54 for what must have been several minutes or so 4 years ago. Needle was about to touch the red zone (or possibly had already touched it, hard to remember).

Was the buffer in the coolant temp gauge reduced or stock?

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[Galapolis]

Was the buffer in the coolant temp gauge reduced or stock?

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Stock, this was a month after I bought the car.

[t.er]

Stock, this was a month after I bought the car.

Dayum! Good to know in a very worst-case scenario though.

I ever so slightly overheated mine while bleeding it. Had the temp pulled up on the cluster, it only went to 102-103C and then I got a code for the VANOS exhaust solenoid, along with a very poorly running engine. Pulled the solenoid and pushed it with my finger a few times, reset the code, and all was well.

[Dathaeus]

So the shop said the radiator was all messed up and the lower hose, so those have to be replaced first, cant even do the compression test and exhaust in coolant yet.

$500+ for installing the lower hose, new coolant (that I provided), and the diagnostics so far... seemed a little steep but...

And another $900 or so for the radiator and thermostat that goes with it, installed.

I'll know more Monday night hopefully.

[Dathaeus]

This is a highly rate and vouched for shop near me... Guy was very nice and knowledgeable... he said the particles from the busted plastic impeller got into the radiator and was clogging it with pretty much zero air flow through it.

Seems a little expensive but there is only one thing that actually worries me.



He said everything seemed fine after all this.

The one thing I have noticed is that in low RPM especially in 1st-2nd gear, I feel a little shimmy in the throttle (max about 2-3 times, as if the power to the engine is getting interrupted by milliseconds) when starting out... It is not totally obvious (where you might think it is just bad timing on the shift) but it is definitely there that wasn't before all this. If I start the gas nice and slow it rarely happens. Once I am on the road and maintain RPM's, its smooth as silk again. Power seems fine, sounds all fine.

Is this something that will go away in time or is this a sign of much worse to come?

If I do everything slow and perfect, this isn't something that would be a serious problem for me, just a bit annoying, but that's not really my main concern.

[az3579]

Well, that is pretty expensive, but taking into account the markup they put on the parts, it's not unexpected. As for labor, they probably spent a good amount of time troubleshooting one bad part after another. The compounded issues piled up explains the labor cost.

At least you don't need an engine, so that's good.

[Dathaeus]

Well, that is pretty expensive, but taking into account the markup they put on the parts, it's not unexpected. As for labor, they probably spent a good amount of time troubleshooting one bad part after another. The compounded issues piled up explains the labor cost.

At least you don't need an engine, so that's good.

Well, so far right....
So no idea what that little shimmy could be? Its definitely not normal... And if it doesn't go away, I wouldn't even know what to test for it...

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[sillieidiot]

I would check for a vacuum leak at the usual places. intake hoses, tb, icv, disa. everything in that area lol

[Dathaeus]

I would check for a vacuum leak at the usual places. intake hoses, tb, icv, disa. everything in that area lol

Kk thanks!

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