2008 RTL with 78k miles on it.
In December I get a check engine code of p0305 cylinder 5 misfire while on highway @ 65 mph straight and level.
Light cleared itself after a day.
Had oil changed and inspection at Honda dealer and asked to have code investigated. No trouble found no codes or pending codes found.
2 months later, cruising @ 50 mph and suddenly the check engine light is flashing, engine misfiring badly. Multiple misfire codes shown.
Take it to Honda. They initially suspect bad coil pack and valve adjustments.
When they pull spark plug on Cylinder #5 they find that it is missing the center electrode and insulator. Cylinder # 5 has no compression. Initially suspect valve damage.
Pulling head shows badly scored walls and head damage.
I bought this in May 2011 w/ 43k miles on it as a CPO vehicle.
I'm well under the 100k miles of the CPO warranty but only 7 weeks away from the end of the 7 years!!
Waiting on Honda Care to approve a new short block under the CPO warranty.
I'm quite surprised to find that they won't cover a rental/loaner for a covered repair.
I've had two Chrysler CPO vehicles and always got a loaner when a covered repair took more than one day.
I don't know, and probably will never know if the plug broke and eating it chewed up cylinder #5 or if something bad happened in Cyl #5 and that broke the plug.
There are several other posts on this forum about cylinder # 5 plug issues. Most of them with broken plugs that require help in getting them removed.
Such as
Blew a spark plug from the head....
and
Ignition Coil + Spark Plug Exploded, Threads damaged...What do I do now?
When (if ) Honda approves the repair I will also have the timing belt and water pump replaced (free labor) as well as replacing all spark plugs and adjusting valve lash.
With the front manifold removed the mechanic notes that the throat to the catalytic converted is coated with powdered ceramic from the spark plug insulator that was ingested and pulverized by cylinder #5. He recommends replacing it now since it is already exposed but the part is over $400 from Honda.. I don't know that it is possible to tell if the honeycomb is plugged up from that ceramic dust. Service tech says Honda won't cover the cat since it isn't a covered part. I say that if it is damaged then it was damaged by their engine failure so they should cover it if they are recommending that it be replaced.
If they put it back together and the cat fails <80k miles then Honda would be on the hook for the replacement under Emission Warranty. But I've only got 2k miles left until I hit that mark. Would you replace it now while there is no additional labor to do it or would you risk it knowing that if it does fail > 2k miles from know I'll be out the same cost of the Cat plus likely $200 in labor.
I'm typically in favor of paying for as many parts as is practical to replace when someone else is paying for the labor.
It's tough being without my truck (no word on how long to repair) but it would be way worse if it happened 2 months from now and I was out of warranty.
In December I get a check engine code of p0305 cylinder 5 misfire while on highway @ 65 mph straight and level.
Light cleared itself after a day.
Had oil changed and inspection at Honda dealer and asked to have code investigated. No trouble found no codes or pending codes found.
2 months later, cruising @ 50 mph and suddenly the check engine light is flashing, engine misfiring badly. Multiple misfire codes shown.
Take it to Honda. They initially suspect bad coil pack and valve adjustments.
When they pull spark plug on Cylinder #5 they find that it is missing the center electrode and insulator. Cylinder # 5 has no compression. Initially suspect valve damage.
Pulling head shows badly scored walls and head damage.
I bought this in May 2011 w/ 43k miles on it as a CPO vehicle.
I'm well under the 100k miles of the CPO warranty but only 7 weeks away from the end of the 7 years!!
Waiting on Honda Care to approve a new short block under the CPO warranty.
I'm quite surprised to find that they won't cover a rental/loaner for a covered repair.
I've had two Chrysler CPO vehicles and always got a loaner when a covered repair took more than one day.
I don't know, and probably will never know if the plug broke and eating it chewed up cylinder #5 or if something bad happened in Cyl #5 and that broke the plug.
There are several other posts on this forum about cylinder # 5 plug issues. Most of them with broken plugs that require help in getting them removed.
Such as
Blew a spark plug from the head....
and
Ignition Coil + Spark Plug Exploded, Threads damaged...What do I do now?
When (if ) Honda approves the repair I will also have the timing belt and water pump replaced (free labor) as well as replacing all spark plugs and adjusting valve lash.
With the front manifold removed the mechanic notes that the throat to the catalytic converted is coated with powdered ceramic from the spark plug insulator that was ingested and pulverized by cylinder #5. He recommends replacing it now since it is already exposed but the part is over $400 from Honda.. I don't know that it is possible to tell if the honeycomb is plugged up from that ceramic dust. Service tech says Honda won't cover the cat since it isn't a covered part. I say that if it is damaged then it was damaged by their engine failure so they should cover it if they are recommending that it be replaced.
If they put it back together and the cat fails <80k miles then Honda would be on the hook for the replacement under Emission Warranty. But I've only got 2k miles left until I hit that mark. Would you replace it now while there is no additional labor to do it or would you risk it knowing that if it does fail > 2k miles from know I'll be out the same cost of the Cat plus likely $200 in labor.
I'm typically in favor of paying for as many parts as is practical to replace when someone else is paying for the labor.
It's tough being without my truck (no word on how long to repair) but it would be way worse if it happened 2 months from now and I was out of warranty.