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Valve seal Replacement

Started by fjman, May 17, 2019, 09:27:20 AM

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fjman

May 17, 2019, 09:27:20 AM
Hello everyone. I'm about to replace the valve seals on my 85 Fj1100.  Will also be doing a top end overhaul.Piston #1 has a lot of carbon buildup compared to the rest. I suspect this is where im having valve seal issues. Here's a picture of the head. Is this normal or am i having burnt valves? There's no damage to the head or valves they just have a lot of carbon buildup. Thanks

Pat Conlon

#1
May 17, 2019, 10:50:03 AM
Put a strong flashlight in the intake ports and exhaust ports, now in the dark, can you see light leaking in around the edges of the valves?

Usually I'm a oem guy, excepting valve seals. The Viton valve seals RPM sells are superior to oem seals.

http://rpmracingca.com/proddetail.asp?prod=Head%3AVSS&cat=39

1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Flynt

#2
May 17, 2019, 06:34:06 PM
Quote from: fjman on May 17, 2019, 09:27:20 AM
Will also be doing a top end overhaul...


How are the rings?  That looks more like this bike has been burning oil...  1 is bad, but there's quite a bit of carbon the others as well. 

Frank
There's plenty of time for sleep in the grave...

fjman

#3
May 23, 2019, 02:26:48 AM
here's an update. I had them blasted. Valves are currently being polished. :morning2: (disregard the sparkplug. I was supposed to remove them but rather I took a pic first anyway)


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