Broken Valve Spring

charliev68 · 11-03-2023, 04:12 PM

Broken valve spring #5!

spammysammich · 11-03-2023, 06:20 PM

Definitely something that has been reported as a potential problem with this engine. Sorry it happened to you. What now?

charliev68 · 11-03-2023, 06:58 PM

Engine is out.
Super Tech Valve Springs
New Valve Stem Seals
Another Set of RBs
Clean Exhaust Ports (SAI)
FRESH SET OF MAIN BEARINGS!

Basically an engine refresh!

spammysammich · 11-03-2023, 08:04 PM

Would you mind documenting the timing process on video? All the stuff I’ve seen so far is in German or poorly shot. I’ve got ISTA but I learn much better visually.

spammysammich · 11-03-2023, 08:06 PM

So it looks like the spring didn’t drop the valve enough to grenade anything. Got that going for you 👍

spammysammich · 11-03-2023, 08:07 PM

I assume the SAP system will get cleaned out too yeah? It’d be a shame to freshen everything else up without going through it.

charliev68 · 11-03-2023, 08:32 PM

Quote:

Originally Posted by spammysammich

So it looks like the spring didn’t drop the valve enough to grenade anything. Got that going for you 👍

Yes. Thank goodness it didn’t drop. That would have been game over.
I have a feeling the valve is bent because I can see it hung open. I’m going to replace the spring and seal and do a leak down test. If it leaks too much, I will pull the heads and refresh all the valves.

spammysammich · 11-03-2023, 08:42 PM

Quote:

Originally Posted by charliev68

Yes. Thank goodness it didn’t drop. That would have been game over.
I have a feeling the valve is bent because I can see it hung open

Looks like you dodged a bullet. Yeah hopefully the damage is minimal. I’m sure she’ll be mint when you’re done.

I’ve always been curious about doing springs without pulling the engine entirely. I’ve seen a few videos on swapping springs and refreshing valve seals on N62s. Nothing on our cars though. Maybe I haven’t looked in the right places.

Scrippy · 11-04-2023, 07:31 PM

Quote:

Originally Posted by spammysammich

I assume the SAP system will get cleaned out too yeah? It’d be a shame to freshen everything else up without going through it.

I think that’s what he meant when he said this….”Clean Exhaust Ports (SAI)”. SAI:Secondary Air Injection. I just did this with the engine in and it was a suuuuuuper fun job!

spammysammich · 11-04-2023, 07:34 PM

Quote:

Originally Posted by Scrippy

I think that’s what he meant when he said this….”Clean Exhaust Ports (SAI)”. I just did this with the engine in and it was a suuuuuuper fun job!

Aaah yes I see, it looks like a fresh hell if the engine isn’t pulled. Yikes.

Scrippy · 11-04-2023, 07:45 PM

Quote:

Originally Posted by spammysammich

Aaah yes I see, it looks like a fresh hell if the engine isn’t pulled. Yikes.

In my case I didn’t have the 3g’s to have the dealer do it. A few vacuum fittings on some hose, 1 can of Seafoam per side and a gun bore cleaner worked out for me! The clogged side was evident when I pushed my endoscope through to look prior to any cleaning.

charliev68 · 11-04-2023, 08:00 PM

Everything is easy with the engine out!

charliev68 · 11-05-2023, 01:52 AM

Gratuitous Plug for MPorium VANOS Cups! FTMFW! Beautiful hardware.

charliev68 · 11-05-2023, 11:30 AM

The broken spring put a groove into the bore. Wondering if it will be a problem?
The bucket won’t go pass the groove!

charliev68 · 11-13-2023, 11:59 PM

Coming along nicely! Everything looks real good besides the #5 spring

spammysammich · 11-14-2023, 12:23 AM

What codes were you getting from the broken spring? This is nightmare fuel for me.

charliev68 · 11-14-2023, 12:33 AM

It would go into limp mode and then die. Only codes I got were misfire codes. The whole bank 2 (cyl 5,6,7,8)
I would describe it as a huge vacuum leak. At first that’s what I thought it was. No big deal…lol!

charliev68 · 11-22-2023, 09:40 PM

Crankshaft is coming out soon. Curious to see the condition of the Main Bearings. Engine has 130k miles. Will post pics!

Theodore2 · 12-03-2023, 10:07 AM

Were you able to put the engine back together yet? Any issues with the groove caused by the broken spring?

charliev68 · 12-03-2023, 08:06 PM

Quote:

Originally Posted by Theodore2

Were you able to put the engine back together yet? Any issues with the groove caused by the broken spring?

Working on the bottom end right now.
The groove shouldn’t be a problem according to the people I’ve been talking to. They said just to hit it smooth with a bit, then polish it smooth.

Scrippy · 12-05-2023, 02:53 PM

Quote:

Originally Posted by charliev68

Everything is easy with the engine out!

This looks fucking terrifying to me!

charliev68 · 12-05-2023, 03:17 PM

Quote:

Originally Posted by Scrippy

This looks fuckingbterrifying to me!

It’s not that bad. It’s a great engine design, very Motorsport! Design DNA and simplicity of engineering is amazing.

11-03-2023, 04:12 PM	#1
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	Broken valve spring #5! Last edited by charliev68; 11-04-2023 at 01:44 PM..
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11-03-2023, 06:20 PM	#2
spammysammich Major 1584 Rep 1,104 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Definitely something that has been reported as a potential problem with this engine. Sorry it happened to you. What now?
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11-03-2023, 06:58 PM	#3
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	Engine is out. Super Tech Valve Springs New Valve Stem Seals Another Set of RBs Clean Exhaust Ports (SAI) FRESH SET OF MAIN BEARINGS! Basically an engine refresh! Attached Images
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11-03-2023, 08:04 PM	#4
spammysammich Major 1584 Rep 1,104 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Would you mind documenting the timing process on video? All the stuff I’ve seen so far is in German or poorly shot. I’ve got ISTA but I learn much better visually.
	Appreciate 1 DrFerry6728.50 Quote

11-03-2023, 08:07 PM	#6
spammysammich Major 1584 Rep 1,104 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	I assume the SAP system will get cleaned out too yeah? It’d be a shame to freshen everything else up without going through it.
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11-03-2023, 08:06 PM	#5
spammysammich Major 1584 Rep 1,104 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	So it looks like the spring didn’t drop the valve enough to grenade anything. Got that going for you 👍
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11-04-2023, 08:00 PM	#12
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	Everything is easy with the engine out! Attached Images
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11-05-2023, 01:52 AM	#13
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	Gratuitous Plug for MPorium VANOS Cups! FTMFW! Beautiful hardware. Attached Images
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11-05-2023, 11:30 AM	#14
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	The broken spring put a groove into the bore. Wondering if it will be a problem? The bucket won’t go pass the groove! Attached Images
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11-13-2023, 11:59 PM	#15
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	Coming along nicely! Everything looks real good besides the #5 spring Attached Images
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11-14-2023, 12:23 AM	#16
spammysammich Major 1584 Rep 1,104 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	What codes were you getting from the broken spring? This is nightmare fuel for me.
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11-14-2023, 12:33 AM	#17
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	It would go into limp mode and then die. Only codes I got were misfire codes. The whole bank 2 (cyl 5,6,7,8) I would describe it as a huge vacuum leak. At first that’s what I thought it was. No big deal…lol!
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11-22-2023, 09:40 PM	#18
charliev68 Second Lieutenant 204 Rep 203 Posts Drives: bmw m3 Join Date: Feb 2020 Location: CA iTrader: (1)	Crankshaft is coming out soon. Curious to see the condition of the Main Bearings. Engine has 130k miles. Will post pics! Attached Images
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12-03-2023, 10:07 AM	#19
Theodore2 Private 44 Rep 50 Posts Drives: E92 M3 Join Date: Aug 2022 Location: Tampa, FL iTrader: (0)	Were you able to put the engine back together yet? Any issues with the groove caused by the broken spring?
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