.png "Powered by vBulletin")
IF IT WERE ME........ I would take the head off, inspect for bent valves, and reset the cams. ALSO if you look at each shim bucket with the cam lobe facing up from the bucket you should see a lot of gap between the cam and the bucket if a valves bent...they tend to not let the bucket come all the way up like normal.
-
MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it. -
When you say "reset the cams," do you mean to take them out and redo them in the same way, according to the manual?Originally posted by chuck hahn View Post
Remember, I'm autistic, you have to be descriptive.1980 GS550EComment
-
It sounds like you're missing compression, you shouldn't be able to keep the spark plug hole closed with your thumb (given a compression stroke).
To be sure, you can borrow a compression tester (or buy a cheapo one, should be sufficient).
The hissing noise usually is a cylinder sucking in air, so given your reply re. the notches one could assume that your cams are at least close to correct timing.#1: 1979 GS 550 EC "Red" – Very first Bike / Overhaul thread New here? ☛ Read the Top 10 Newbie mistakes thread
#2: 1978 GS 550 EC "Blue" – Can't make it a donor / "Rebuild" thread Manuals (and much more): See Cliff's homepage here
#3: 2014 Moto Guzzi V7 II Racer – One needs a runner while wrenching
#4: 1980 Moto Guzzi V65C – Something to chillComment
-
Yes...by reset i mean reinstall them after checking things out in the head ( bent valves or damaged valve seats ). Following the manuals directions of course.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
-
Just got the head gasket today (was supposed to arrive on the 16th). When daylight comes, I'll head outside and put it on.1980 GS550EComment
-
LOOK VERY CLOSELY at all the shims when you first remove the cams. Look for any that arent as far up as the others. Then look real close at the valves where the meet the seats for ANYTHING unusual.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
-
The best test to direct you to where the problems are is a Leak Down Test.
Look it up. Not hard to do
Mad83 GS750E
2006 ZX14
2004 KTM 450 EXC
2001 Yamaha Big BearComment
-
Got the head off, none of the valves look bent. I'd post a picture, but again, it keeps saying "failed."1980 GS550EComment
-
Jasper, about the picture thing, in case you didn’t know, in order to post pictures to the site, you should have those pictures hosted on another pic hosting site, like Imgur. If you’re interested, Instructions linked in my signature.Rich
1982 GS 750TZ
2015 Triumph Tiger 1200
BikeCliff's / Charging System Sorted / Posting Pics
Destroy-Rebuild 750T/ Destroy-Rebuild part deuxComment
-
There's another problem. One of the cylinder head bolts is misaligned. It doesn't sit evenly with the other one next to it. It's the pair in between #3 and #4. 16161028230708070189759009663240.jpg1980 GS550EComment
-
As long as the cylinders and the head set on the dowels it doesnt matter. Be sure all the dowels are there and out it together. AS for as far as the up and down goes you can double nut the stud and remove it. Then loctite it in at the right depth and bream the nuts loose. You can hold the stud with vice grips in the skinny area to remove the nuts.Last edited by chuck hahn; 03-18-2021, 06:57 PM.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
-
The problem is the nut. It doesn't want to tighten. I believe it reaches the end of the thread before it fully tightens enough to hold the head down.1980 GS550EComment
-
So lets say the outer four studs thge nuts tighten....yes? Then make sure ALL of them are that length.......damn.MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
-
All the others are the proper length. Just this one.Originally posted by chuck hahn View Post1980 GS550EComment
-
SO make it the sameMY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.Comment
Comment