Now look very closely inside of that valve spring. Make sure the guide is the same height as the valve guide on the other valve. If the head overheats it will cause the valve guides to migrate toward the valve keepers which then get to a point that they will prevent the valve from opening which is the cause of the bent push rods most of the time.
As long as the valve guides haven't moved toward the valve keeper where they will prevent the valves from fully opening and bending another push rod, the valve and piston and cylinder should be fine.
Only the intake valve would have a valve seal. And the guides are not replaceable.
Loctite needs some space to work. If the guide fits the hole with with no space between the guide and the head when the guide is pressed in the Loctite will just be wiped off. You could file a groove for the Loctite in the guide and then press the guide in. The groove needs to be only a few thousandths deep. The green (#609? I forget) Loctite for cylindrical parts loses its hold completely at about 450 degrees F. It does start to weaken at about 400 degrees.
The Vanguard isn't the same engine as the OP which is the Intek series. The Intek is more of a 750-1000 hour homeowner engine where the Vanguard is a commercial rated 1500-2000 hour engine.
There are a few people out there that have pressed them back into place and found a way to lock them there. If the attempt fails the guide will migrate back out and cause another bent push rod or worse end up in the crankcase. If the repair fails you will know in about an hour of operation.
