pop quiz


Information and questions on GL1100 Goldwings (1980-1983)
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ernest rudshtein
Posts: 33
Joined: Sun Oct 01, 2017 2:15 pm
Location: israel
Motorcycle: 1980 gl1100 interstate

pop quiz

Post by ernest rudshtein » Thu Sep 06, 2018 4:32 pm



hi boyz
got to figure this one out
symptoms:
1.loud knock on left side -seems to sound like valve/ rocker arm tap noise ( valve clearance is on the spot, maybe its "lower" engine knock? ) maybe piston connecting rod bearing? carbs are at full sync, all 4 Cylinders are firing.
2.bike at working temperature after a city ride- let it sit for 5 min on the side stand (engine off) - oil leak in to the combustion chamber -gray smoke on start up - clears only after 8-10 min.(valve gide seal gone bad?)
3.on high way use, problem 2 doest occur. oil consumption is high, considering 39 year old bike , still high.
4. will a compression check point to the problem? ( can i isolate valve guide seal failure from rings gone bad and/ or piston connecting rod bearing failure without taking the engine off/ or a full rebuild? do this problems come separately, or all together?
please inform on any ideas..
ariel


Probably the only goldwing with a surfboard rack

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Aussie81Interstate
Posts: 995
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 2001 GL1500F6C Valkyrie
1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500 (sold)

Re: pop quiz

Post by Aussie81Interstate » Thu Sep 06, 2018 5:10 pm

Run a compression check first if the valves have been adjusted to spec. You might find the issue straight away.

DaveO430
Posts: 927
Joined: Fri Jan 02, 2015 7:28 pm
Location: Amity. Ar
Motorcycle: 2010 GL1800
2004 Suzuki DR200

Re: pop quiz

Post by DaveO430 » Thu Sep 06, 2018 7:24 pm

The first thing I thought of on the knock is a bent connecting rod. You might be able to determine that by removing the spark plugs, setting the crank to T1 then T2 and check if the pistons on 2 & 4 are the same distance from the top.
The smoking is probably not the valve stem seals, it is the piston rings.

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