- Location
- Grand Junction, CO
LX470 misfires, died
- Thread starter DAA
- Start date
- Location
- The Village of Kay
Can you out a camera into the piston to see how bad it is without pulling the head? That looks bad...
- Location
- West Bountiful, UT
Possibly, maybe a cheap camera bore scope or something. I tried with my bore scope for rifle barrels, but it has a 90* mirror on it so I couldn't see the piston. Could see there isn't much left of the threads in the head. Probed with a long screwdriver, didn't find an obvious hole in the piston. I'm not real optimistic about what it looks like in there though.
- DAA
lhracing
Well-Known Member
- Location
- Layton, UT
For a head and possible used motor you may want to check with Metric Motors in Centerville.
- Location
- West Bountiful, UT
So I went and got a cheap digital inspection camera from Harbor Fright. Can actually see the piston very well with it. And the piston looks perfect.
The spark plug threads are in bad shape, but there is still some thread there. I'm thinking about trying to helicoil the threads without taking it apart. If that works, put a new plug and a new coil pack in and see what happens.
- DAA
The spark plug threads are in bad shape, but there is still some thread there. I'm thinking about trying to helicoil the threads without taking it apart. If that works, put a new plug and a new coil pack in and see what happens.
- DAA
- Location
- Grand Junction, CO
I bought a civic back in the day that had some missing threads in the head where the plug goes and I literally JB welded the threads and tightened up as tight as I dared to and proceeded to put another 100k miles on that car, Mind you this was a 600 dollar car when I bought it. Just a funny story I dont commend that type of behavior.. 
Jesser04
Well-Known Member
- Location
- Kaysville Utah
That spark plug doesn’t explain why it won’t crank. Hate to be a downer but I think you got some real problems.
- Location
- West Bountiful, UT
No doubt...
- DAA
- DAA
Jesser04
Well-Known Member
- Location
- Kaysville Utah
I feel you pain. I hope you a better man than I am I’d be bitching up a storm saying I drove this thing for xxx,xxx miles and it was fine and look what you’ve done to it. This is why we can’t have nice things...
- Location
- West Jordan
It could explain the no crank - maybe - the computer may sense a short in the circuit caused by the destroyed coil and not crank? I have no idea if it's that smart, but I wouldn't be surprised.
rholbrook
Well-Known Member
- Location
- Kaysville, Ut
Did you ever try to turn it over by hand yet?
4x4_Welder
Well-Known Member
- Location
- Twin Falls, ID
There are some great spark plug thread repair kits on the market now for under $100. The helicoil style is easier to use, can be done as a first step, and if it fails later can be replaced with the shell style. Just make sure you very carefully follow the directions, or you can trash the head.
- Location
- West Bountiful, UT
Yes, it turns over by hand.
Ordered a coil pack and a helicoil kit, so will hopefully have that part done in a few days. I'm out of ideas on the no crank though. Not that I had that many ideas to begin with. Something fried, I'd guess, but troubleshooting just what, I'm over my head I think.
- DAA
- Location
- Sandy, Ut
Yikes, that is a wild one. I can't say I've heard of the no crank related to the coil packs but then again I don't know that I've seen one that toasted either. I'm with Bryson, it may be causing a full on short.
4x4_Welder
Well-Known Member
- Location
- Twin Falls, ID
Have you load tested the battery?
- Location
- West Bountiful, UT
Not a real load test. I just left the lights on for a minute to knock the surface charge off. 12.55v. Pretty marginal I'd say. Putting a jumper on it doesn't do anything as far as cranking.
- DAA
- DAA
- Location
- West Bountiful, UT
It lives!
Thread insert in the head for the spark plug, new plug, new coil, new coil connector/pigtail soldered on. Cranked right over. Started right up. Seems to be running fine? No test drive yet. Going to give the thread sealer on the helicoil another 12 hours to cure first.
Fingers crossed. Knocking on my wooden head, all that. SRA might be back terrorizing the streets tomorrow though.
- DAA
Thread insert in the head for the spark plug, new plug, new coil, new coil connector/pigtail soldered on. Cranked right over. Started right up. Seems to be running fine? No test drive yet. Going to give the thread sealer on the helicoil another 12 hours to cure first.
Fingers crossed. Knocking on my wooden head, all that. SRA might be back terrorizing the streets tomorrow though
.- DAA