.png "Powered by vBulletin")
Ok this is pretty embarrassing, on my 1981 gs650g I cross threaded a spark plug, I know what a stupid mistake, but I have pulled the head and retaped the whole, here in lies the problem when I put the head back on with a new head gasket, and put everything together, I cant seem to get my rings to seat, I'm getting blow by. Any tricks that anyone has to reseat a set of rings that has been setting, without breaking down the engine would be very much appreciated.
-
It’s my bike I’ll run it in the ground if I want to -
Couple of questions...I'm assuming when you say blowby that it's smoking. How long did it sit unused ? Did it smoke prior to this happening ?
If you've turned the job around reasonably quickly and it had run well previously, I'd look at the head gasket rather than the rings. It could well be oil leaking into the bore rather than past the rings.
And to cover another base - Did you change the oil perchance ? -
sorry I did leave some info out, ok it sat for maybe 3 yrs, I have adjusted valve shims, rebuilt carbs, replaced all gaskets, yes it is smoking, I did check compression it is about 15 lbs lower on cylinders 1 and 4 than 2-3, runs amazingly well she just smokes, not lot burning car tires just a small amount of oil smoke, worse when cold and at idleIt’s my bike I’ll run it in the ground if I want toComment
-
If you have had the head off I assume you changed the cylinder base gasket whilst the head was off? If so any sticking rings would have been easily seen and freed off.
change the oil and filter and ride it fairly hard for a hundred miles or so and check the compression not forgetting to do it hot with the throttle held wide open.
what was the compression readings on each cylinder?Last edited by fastbysuzuki; 04-12-2018, 04:20 PM.The big guy up there rides a Suzuki (this I know)
1981 gs850gx
1999 RF900
past bikes. RF900
TL1000s
Hayabusa
gsx 750f x2
197cc Francis Barnett
various British nailsComment
-
I am going to second fastbysuzuki's question: Did you change the base gasket?
If not, I'm going to have to go into Clint Eastwood mode: "How lucky do you feel, punk?"
No matter how careful you are, the process of removing the head WILL disturb the base gasket. If it happened to stick to both surfaces, it will tear into two layers, and there is no guarantee that they will go back together well enough to seal.
.sigpic
mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
#1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
#2 son: 1980 GS1000G
Family Portrait
Siblings and Spouses
Mom's first ride
Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
(Click on my username in the upper-left corner for e-mail info.)Comment
-
well I must say after some hardish riding, not a speed demon here she is really clearing up, id say 80% better and the compression numbers seem to coming backIt’s my bike I’ll run it in the ground if I want toComment
-
Always inspect and hone the cylinders when apart and practice a good hard first start.
And measure ring gap. Used rings are fine if in spec.1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
Comment
Comment