Who can read a spark plug?
10-11-2012, 09:35 AM
#1
Member
Thread Starter
Who can read a spark plug?
Here is the driver front plug from my bone stock 2009 C63 w/45K miles.....
White stuff all over the ground strap, worn electrode, etc. IMO, it looks terrible and almost like it may be/have been exposed to coolant.
I have 8 new plugs sitting here to install (because the car drives like it needs new plugs), however, I am not going to install them if they are just going to go this direction again....maybe head bolts are in order and warranty can cover the cost of new spark plugs.
White stuff all over the ground strap, worn electrode, etc. IMO, it looks terrible and almost like it may be/have been exposed to coolant.
I have 8 new plugs sitting here to install (because the car drives like it needs new plugs), however, I am not going to install them if they are just going to go this direction again....maybe head bolts are in order and warranty can cover the cost of new spark plugs.
10-11-2012, 10:35 AM
#2
Senior Member
Join Date: Feb 2009
Location: Las Vegas
Posts: 304
Likes: 0
Received 0 Likes
on
0 Posts
C63 & Mustang Mach1(s)
That is just not right at all. I would take it directly to MB and discuss it with your SA ASAP. Have him/mechanic explain that plug and most likely why it looks like that.
10-11-2012, 10:43 AM
#3
Member
Thread Starter
If they return, I will probably press for headbolt replacement. Heck, they just replaced the intake manifold gaskets!!
10-11-2012, 11:50 AM
#4
MBWorld Fanatic!
That looks like an ash fouled plug which can be caused by burning of oil. I would say that's likely common considering how much oil gets through the PCV in this car.
10-11-2012, 03:21 PM
#6
Member
Thread Starter
BTW, my shop foreman said the same thing, looks like it had some questionable gas at some point or due to the fact these are oil burners.
Well, I would recommend doing it before 45K, this is what all 8 plugs look like, manual calls for 80K I believe.... No need to deviate from stock unless you are pushing 100 more HP (headers and tune), then go to SLS plugs or whatever is one heat range colder.
10-11-2012, 03:33 PM
#7
MBWorld Fanatic!
Are there options on this car to eliminate or redesign the PCV system? With the LSx motors there are a lot of ways to clean up the combustion process....
BTW, my shop foreman said the same thing, looks like it had some questionable gas at some point or due to the fact these are oil burners.
BTW, my shop foreman said the same thing, looks like it had some questionable gas at some point or due to the fact these are oil burners.
Trending Topics
10-11-2012, 03:38 PM
#8
Member
Thread Starter
Catch can. http://www.weistec.com/m156os.html
Shame that is about 400 dollars overpriced. Benz tax.....
Catch cans aren't a very good solution even at 100 bucks. I much prefer to vent filtered air (which is not emissions compliant) and completely eliminate any crankcase gasses, etc from entering the intake at all.
Guess I will have to poke around under the hood.
10-11-2012, 04:50 PM
#9
MBWorld Fanatic!
Shame that is about 400 dollars overpriced. Benz tax.....
Catch cans aren't a very good solution even at 100 bucks. I much prefer to vent filtered air (which is not emissions compliant) and completely eliminate any crankcase gasses, etc from entering the intake at all.
Guess I will have to poke around under the hood.
Catch cans aren't a very good solution even at 100 bucks. I much prefer to vent filtered air (which is not emissions compliant) and completely eliminate any crankcase gasses, etc from entering the intake at all.
Guess I will have to poke around under the hood.
10-11-2012, 05:22 PM
#10
Member
Thread Starter
10-11-2012, 05:58 PM
#11
Junior Member
Join Date: Mar 2012
Location: Las Vegas, NV
Posts: 47
Likes: 0
Received 0 Likes
on
0 Posts
'03 325i, '05 GTO, Shopping for C63
Crank case vacuum (along with higher operating temps) is vital to a long lasting engine. Removing the PCV will not have any visible effects immediately but it will shorten the life of your engine.
I've battled this endlessly on boosted engines. A catch can will work IF it is the correct application, a can with some filter media isn't going to cut it. I have not looked at the Weisco can in depth to see exactly what it involves.
I've battled this endlessly on boosted engines. A catch can will work IF it is the correct application, a can with some filter media isn't going to cut it. I have not looked at the Weisco can in depth to see exactly what it involves.
10-11-2012, 11:03 PM
#13
Member
Thread Starter
the shop foreman also said the headbolt issue is not gradual, it happens quickly and the coolant goes into the crankcase, not the combustion chamber. better to check the oil cap for milk rather than the plugs on that one.
10-13-2012, 01:36 AM
#17
MBWorld Fanatic!
There are at least two members of this forum who have run crankcase vacuum pumps but they were both on the M113 engines.
https://mbworld.org/forums/c36-amg-c...e-its-way.html
https://mbworld.org/forums/clk55-amg...ject-suck.html
