Spark Issues/Engine Stalls
Thread Starter
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5th Gear
Joined: Jan 2020
Posts: 9
Likes: 1
From: Austin, TX
Nope no help here...i have no experience with that bike so I really can't give you any specific answers. I won't be "that guy" who gives advice on something I know nothing about. Now what I do know...with only 12k on the bike the plugs should have come out no problem...always take them out when the motor is cool. Put a dab of anti seize on the new plug and always thread them in as far as you can by hand...never start them with a wrench.
Did you make any changes to the bike...intake, exhaust??? Anything other than just the plugs?
Question for some one smarter than me...could there have been damage done to the motor by hydro locking with the seafoam he poured in the cylinders? That's about all I got, hopefully you'll get figured out without breaking the bank
Did you make any changes to the bike...intake, exhaust??? Anything other than just the plugs?
Question for some one smarter than me...could there have been damage done to the motor by hydro locking with the seafoam he poured in the cylinders? That's about all I got, hopefully you'll get figured out without breaking the bank
Road Master
Joined: Jul 2019
Posts: 769
Likes: 432
From: CLT NC
I am 53 years old and have been servicing auto, boat, bike, lawn, etc. engines since my teens and a properly-torqued spark plug will NEVER break.
To state breaking a spark plug "Happens all the time" is completely inaccurate...
To state breaking a spark plug "Happens all the time" is completely inaccurate...
Thread Starter
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5th Gear
Joined: Jan 2020
Posts: 9
Likes: 1
From: Austin, TX
Yes, the problem is I over-torqued it and it broke, but it's been resolved. What I meant by "it happens all the time" is that it isn't a big deal, and can happen to anybody. But, like I said, it's been resolved. Got any tips for the rest of it?
Road Master
Joined: Jul 2019
Posts: 769
Likes: 432
From: CLT NC
White smoke from exhaust system almost always implies coolant leak on the intake side. I suggest a coolant system pressure test - Page 7-4 in HD Service Manual.
Last edited by VortecCPI; Feb 3, 2020 at 08:09 AM.
Thread Starter
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5th Gear
Joined: Jan 2020
Posts: 9
Likes: 1
From: Austin, TX
Thanks, I'll definitely check that out. Is it possible that it's something other than blown head gasket? If so, what should I look for?
Road Master
Joined: Jul 2019
Posts: 769
Likes: 432
From: CLT NC
I do not know of any other way coolant could find its way into the engine. However, if this were the case you should have been using coolant prior to this incident. I might also expect some overheating if it was hot riding weather.
Thread Starter
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5th Gear
Joined: Jan 2020
Posts: 9
Likes: 1
From: Austin, TX
That's the strange part, those symptoms only just appeared. Either way, I'll be taking it to a mechanic tomorrow and will tell them it has symptoms of failed ignition coils and symptoms of head gasket leak. Thanks for your help
Road Master
Joined: Jul 2019
Posts: 769
Likes: 432
From: CLT NC
Hopefully just a head gasket...
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Thread Starter
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5th Gear
Joined: Jan 2020
Posts: 9
Likes: 1
From: Austin, TX
I took it to the Harley shop, but they couldn't find any coolant leak and said it was running fine. I found out it only ran fine in warm weather (70°+) but wouldn't run at all in cold weather, such as early in the morning.
Turns out it was the spark plugs. For whatever reason she doesn't like iridium plugs. Switched to screaming eagle plugs and they ran perfectly.
Any symptoms of blown head gasket were caused by unburned seafoam in the gas tank and engine, as well as too little fuel. It essentially got dilluted.
So, changed spark plugs once more, filled up, changed oil a couple times for good measure, and it's running the way it's supposed to.
Turns out it was the spark plugs. For whatever reason she doesn't like iridium plugs. Switched to screaming eagle plugs and they ran perfectly.
Any symptoms of blown head gasket were caused by unburned seafoam in the gas tank and engine, as well as too little fuel. It essentially got dilluted.
So, changed spark plugs once more, filled up, changed oil a couple times for good measure, and it's running the way it's supposed to.