Re: Bent push rods both cylinders,engine # 445677-0827-B1
You're gonna need a new head - the valves are sticking or the valve guides are.moving. This is a known issue with this B&S engine and B&S has done nothing about warrantying it for anyone that I know of. In the future I'll never buy another B&S engine due to the same problem with mine.
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Could be the rockers are out of adjustment, or you have bent a push rod. If the engine does not seem to have as much power as it should then you probably have bent one or more push rods or you rockers are way out of adjustment. I would suggest taking the car to a good mechanic for a professional diagnosis. Running it to long with either of these problems could cause more damage.
bent push rods come from improper movement of the rocker and valve
This can be from an incorrect length push rod-- some v8 engines run different lengths for inlet and exhaust
from rocker arm jamming on the shaft or rocker ball
hydraulic cam follower pumping up and jamming the valve spring to a solid block
bent valve stem above the valve guide
valve spring Colette moved or misplaced incorrect rocker for that valve-- some engines run different length rockers for inlet and exhaust
what to do-- if this engine was running all right for some time then the rocker can be omitted. if the problem has been occurring since the cold weather the the oil may be too thick and not allowing the follower to leak down properly
check the follower or replace it , change to a lighter viscosity oil for the duration of the cold weather
unless you have had a recent head change or other mechanical work done the problem will be in those areas.
If you mean when the rocker arm cames up,the valve stays down,don't put the covers on yet. Can't see a push rod doing that,valve guide seized or bent valve bent,seems to me the heads will have to come off.You could pull the plug,push about a foot of nylon rope in the cylinder,turn it over by hand till you feel the interference ,then you can take the valve spring off and see if the valve is bent or stuck,either way.........trouble
Its possible you hydro-locked a cylinder with coolant which would have bent a connecting rod. When a cylinder gets liquid in it, the liquid will not compress so something has to give. The head gasket could be leaking to cause the leak into the cylinder. Hydro lock could also bend a valve.
Hello...ok..the first thing you want to consider is why the push rod bent in the first place...This usually happens because the cylinder is full of fuel because the spark plug is not firing...but this is for multi cylinder engines... have you ever changed the oil???..You have to do this..even on small engines...If this engins has a pull starter..Did it turn over or did it sieze up....If it turns over...carefully remove the rocker arm....replace the bent push rod...it should pull straight out after you remove the rocker arm..replace the rocker arm....re assemble the engine parts using the proper gaskets...making sure everything is sealed...drain and replace oil.If the engine siezed up...then you have to get to serviced or replaced..I hope this was helpful.....let me know...PEACE...
On any pushrod engine you have to make sure that the timing is correct or nearly correct when first firing it up, if you had the cam in the wrong position the pushrod had no place to go when the cam lobe came around=bend push rod.
Sounds like you could be running on one cylinder. I assume you have a two cylinder B&S, Tecumseh, or Kawasaki. Remove one spark plug at a time and try driving the mower. If you have nothing on one spark plug and drives exactly the same with the other, then you have a dead cylinder. Can be a spark problem, unlikely a fuel problem assuming a single carb, a bad head gasket, bent push rods. A lot of B&S Vanguard engines, including mine, have a tendency towards bent push rods.
when u bent the push rod u might have bent the valve in the head ,by puting the longer push rod where it didnt belong it kept the valve open when the piston came up and the force of the piston on the valve bent the push rod,you will have to remove the head,hope this helps
This happened to me,the engine sat for some time and the valves were varnished with stale fuel,they stuck in the guides.This bent the push rod and it was only running on one cylinder.The missingpush rod worked its way into the crankcase through an oil passage . I took the engine sump of and found the push-rod. I cleaned removed the head,cleaned the valves and guides replaced push rods and gasket and it ran fine after that.I use fuel stabilizer now,it keeps the varnish from forming.