n55 valve guides

Netzke98 · 05-04-2024, 09:12 AM

Hey everyone,
I’m currently rebuilding my n55 and have noticed poor seating on the exhaust valves and seen in the picture cylinder 1 and 5 looks to have blow by. Has anyone replaced the guides before?

McGyv3r · 05-08-2024, 12:39 PM

Valve guides likely need to be done by an engine builder. I believe they need to be honed to size once pressed it.

Have you measured the wear in your valve guides to be sure they need to be replaced? Perhaps you could get by with just lapping in all the valves against their seat?

05-04-2024, 09:12 AM	#1
Netzke98 New Member 0 Rep 15 Posts Drives: 2013 BMW 335 f30 Join Date: Aug 2023 Location: Canada iTrader: (0)	n55 valve guides Hey everyone, I’m currently rebuilding my n55 and have noticed poor seating on the exhaust valves and seen in the picture cylinder 1 and 5 looks to have blow by. Has anyone replaced the guides before? Attached Images
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05-08-2024, 12:39 PM	#2
McGyv3r Second Lieutenant 164 Rep 248 Posts Drives: 1989 325i & 2014 335i Join Date: Jul 2021 Location: Philadelphia iTrader: (0) Garage List 2014 BMW 335i [0.00] 1989 BMW 325i [0.00]	Valve guides likely need to be done by an engine builder. I believe they need to be honed to size once pressed it. Have you measured the wear in your valve guides to be sure they need to be replaced? Perhaps you could get by with just lapping in all the valves against their seat?
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