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Seized Engine....I thought

  • Thread starter Thread starter bighamms
  • Start date Start date
B

bighamms

Guest
ok, picked up an 81 gs450s. Put a little penetrating oiling in the spark plug holes 2 weeks ago. Bike will not fire up because the spark plugs don't spark. How do I dry out the cylinders. Will seafoam do the trick?
 
@sqdancer....yeah, that's what I thought, but I don't seam to be getting spark because its a little wet in there. am wondering if the seafoam will act like wd-40 and help displace some of the moisture
 
Have you tested the plugs outside the engine? Like grounding them and turning the engine over with the starter? They should spark outside the engine at the very least. If not, you've got a bit of investigation to do.
 
question from a newbie....isn't it suggested that in the case of a seized engine that one shouldn't go right to the "firing up" stage, but rather hand turn it so as to not overly force the issue? just trying to learn.
 
Some engines are just lightly stuck, others are rusted solid.
It sounds like this one freed itself with a squirt of penetrating oil?
Does it spin freely now?
The spark problem isn't caused by oil, unless there is a ton of it in there.
 
corporalagarn said:
question from a newbie....isn't it suggested that in the case of a seized engine that one shouldn't go right to the "firing up" stage, but rather hand turn it so as to not overly force the issue? just trying to learn.
Click to expand...
Yeah, but if he is not getting spark then he must be already turning the motor over. In general it is best to get a stuck motor to move mechanically rather than by just seeing if the starter motor will do it.
 
bwringer said:
Weeeeellllll, that might cost a whole $3.98...
Click to expand...
Where do you shop? I spent nearly $8 (including tax) at Napa for mine. I went without lunch for two days...
But it sure do run better now, bubba. ;)
 
wow! i step away from my PC for a day and the conversation just carries on without me. Nice...

Ok, so here's were I'm at. Engine is not seized. I was able to turn in by hand and have since gotten the bike to fire up and run for several minutes at a time. After the initial post (by after, I mean literally seconds after I posted), I realized that the best way to get spark is a brand spanking new set of plugs (autozone...NKG's $3.00). Popped them in and it pretty much fired right up....

but now I have a whole new problem. The bike wont stay running because it appears to be starved for fuel. My tanks petcock is on the lower left corner. If I tip the tank, it dumps fuel in the carbs. If I set the tank on the bike in the mounts, nothing. It's almost as if the vacuum is being created and therefore fuel is not being "sucked" into the bike properly. I have decide to replace the petcock, but they are hard to find. Any good suggestions on a replacement/universal petcock? Side note: the old one is trashed. the base (part that screws to tank) is badly deteriorated and leaks fuels. This could be part of the vacuum problem.

HELP...
 
partshark and babbitsonline are also good sources, and tend to be cheaper than bikebandit. They also use true Suzuki part numbers, which can help in searching for parts.
 
@ all....gents (sorry if I'm ASSuming that you are all male), thanks a million. followed some of the links you gave me and realized something very important, the petcock I'm using is not the correct one. the PO included of bag of misc. crap. there were several styles of petcocks in the bag. The one I fitted to the tank was the cleanest, so i assumed (i am seeing a pattern here) that it was the correct one. I'll try out a few of the others and keep you posted.
 
Ok, i'm back and I've got more questions. So i was able to rebuild that correct petcock with a bunch of parts I had been given. Petcock is installed and at this point, NO LEAKS.
but now my bike will not start. I doesn't have a kick start. When I push the start button, it turns over, just won't fire up. Here's what I've tried so far:

on flat ground (tried bike on side stand and center stand):
- start on full choke
- start with no choke
- start with fuel tap on RES
- start with fuel top on ON

on a slight incline (hoping to dump more fuel and pressure on the petcock):
- start on full choke
- start with no choke
- start with fuel tap on RES
- start with fuel top on ON

I took off the cap, complete disassembled it, cleaned all the moving parts including the bearing. Note, the rubber vent gasket needs to be replaced.

Ok, any suggestions?
 
Are you sure fuel is getting to the carbs ? I have clear fuel lines on my bikes so I can watch it.....

The "rebuilt" petcock may not be functioning properly.:)
 
do you have the vacuum line hooked up to the petcock? does it have a 'pri' setting?
 
When the petcock is set to ON or RES only engine vacuum will allow fuel to flow. Switch it to PRI and fuel should flow all the time. You may want to disconnect the fuel line and see if it flows when set to PRI. If it does, reconnect it, set it to PRI, and see if it will start.
 
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