Spark Plug ?, What Happened? Some Close up Pictures... Updated

[holgo123]

Re: Spark Plug ?, What Happened? Update w/Pictures

Re: Spark Plug ?, What Happened? Update w/Pictures

Not sure what the question on 2 odd and 2 even means... I just numbered the right bank 5, 6, 7, 8 to help identify them and I thought that is how they are numbered on a Ford 5.0 l. I took a picture of what I called #7 just for comparison purposes. I will look closer at the top of the piston on the cylinder in question. Here are some different shots... It looks totally intact. I can't see any erosion/gouges/abnormalities...

 

[bruceb58]

Re: Spark Plug ?, What Happened? Update w/Pictures

Re: Spark Plug ?, What Happened? Update w/Pictures

Not sure what the question on 2 odd and 2 even means...

It means Bomar didn't know it was a Ford or that that is the way Ford numbers them.

 

[holgo123]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Thanks... I am puzzled. Even though I was expecting to see a problem with the piston (and was hoping it was o.k.), I now am wondering what happened because it looks o.k. ... I am still thinking about getting the heads cleaned up and checking the valves/valve train, contemplating the injectors since I have it all apart... Let me know if anyone has a good source for a gasket set...

 

[JustJason]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Soooooo is that rust on the valves or my old sweaty eyes blurring the picture?

 

[holgo123]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

It looks like rust spots on the valves to me too... I have owned the boat for about 7 years. It sat for about a year while I repaired the transom from a bad episode of rot... The way I figured out I had a transom problem was a water ingestion issue one evening about a year and a half ago because the boat was taking on water through the transom. I did get the water out immediately and changed the oil and had it fired up and running. I think that the rust occured while it sat when I was repairing the transom. I did fog the cylinders and put oil down the spark plug holes, but... The engine seems to run fine, starts right up, idles smooth, but I did sense a vibration that I hadn't before. It also seemed to be off in power. Maybe the cylinder was going down due to the plug. Seems like it would idle rough though... Even when I was coming in to the dock, It seemed to idle too smooth for that #5 cylinder to be out... Could using the wrong plug (too hot) cause the plug to disintegrate like that? Thanks for all the input!

 

[bomar76]

Re: Spark Plug ?, What Happened? Update w/Pictures

Re: Spark Plug ?, What Happened? Update w/Pictures

This is a Ford. That is how Ford numbers them.

So few Fords anymore I missed that on the original post.

 

[holgo123]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Does anyone know what the "shorting bar" does in the process of setting timing on a Ford/OMC 5.0 l EFI/MPI? I just re-read the instructions on setting the timing and noticed I was suppose to disconnect it when setting the timing. I didn't do this... Also, the plugs I put in this time look like "hot" plugs... They have a lot of exposed ceramic area deep in to the plug. I am going to try and find the recommended plugs, AC-MR43T. I am also going to pull the lifters/check the valves and see if I can find any problems. Can I use an automotive gasket set to put it back together? Any suggestions?

 

[Mkos1980]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

you need marine headgaskets. Stainless core.

 

[f_inscreenname]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

I burned a spark plug end off one day. Fished for the end with no luck. Then installed another and ran it.

Took the motor apart about a year and a half later for other reasons. You would never know it. Sometimes we get lucky.

 

[brunolund]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

yes, using the wrong plug can cause detonation. in extreme cases, an incorreect plug can cost you a motor.

 

[Dakota47]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Heck, youve gone this far may as well rebuild her.. new pistons, rings, bearings.. have the heads done too.

 

[gdombroski]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

The plugs I put in to start the season are Autolite #147. Autozone cross referenced them

According to http://www.sparkplugs.com/results_cross.asp?pid=mr43t&x=19&y=10&seenCrossWarning=1 the cross reference from MR43t is #144 not #147 and a bunch of others. Don't know the difference between them. Might be heat range as they have they same physical specs.

 

[Silvertip]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

I vaguely remember Ford having issues similar to this some years back and the problem was related to spark cross-over due to improper plug wire routing. As I remember it was #7 cylinder that generally suffered failure. The timeframe was late '80's - early 90's so the timeframe would appear right in this case. I have no idea if the issue transfers to marine engines so take this info for what it's worth.

 

[KETELS]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Hi

My 1995 ford 351 fuel injected engine came from the factory with motorcraft AWSF 22C PLUGS. My ford is hooked to a Volvo drive. My manual says that the plugs are the same for the 302. My manual states When routing the port side spark plug leads from distributer, cross leads 5 and 6. I could not find these plugs so I used champion plug #304, RS9YC. Have had no problems.
I have a friend that is a Dodge Mechanic that use to work on fords. He said to make sure you cross those leads. If you don't you could Possibly get cross firing.

 

[Coors]

Re: Spark Plug ?, What Happened? Update w/Pictures

Re: Spark Plug ?, What Happened? Update w/Pictures

So few Fords anymore I missed that on the original post.

What part of Ford didn't you understand?

 

[holgo123]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Thank you for all the information... I am going to have the heads cleaned up and checked out at a machine shop. Probably have a valve job done and check the guides... Replace the valve seals since they come with the gasket kit... I am also going to replace the injectors since they are 15 years old and it is pretty expensive to get them professionally cleaned...

I found this information on Ford 5.0 l on "Induction Crossover". I wish I had looked at the wires before I took them off. I had just replaced them and probably did not have them routed correctly. Mine is the 1-3-7-2-6-5-4-8 firing order...

ISSUE:
Engine miss, spark knock, buck/jerk, surge and other driveability concerns may be caused by induction crossfire. This occurs because of improperly routed spark plug wires.

ACTION:
If spark plug replacement is performed, the correct firing order and spark plug wire routing is essential to prevent the possibility of induction crossfire between cylinders. Refer to the following procedures for inspection of the spark plug wire routing and firing order. Properly reroute the spark plug wires if required.

FIRING ORDER

The firing order for 1987-1993 vehicles is 1-5-4-2-6-3-7-8. If #7 and #8, or #2 and #4 spark plug wires are routed next to each other at the separation bracket, an induction crossfire condition can occur.
The firing order for 1994 vehicles is 1-3-7-2-6-5-4-8. On these vehicles the #1 and #3, or #5 and #6 spark plug wires must be separated to eliminate the possibility of an induction crossfire.

Learn something new all the time... I will let you'all know how it goes once I get it back together... Hopefully...

 

[f_inscreenname]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

Like said before, you are almost there. In a 15 year old motor rings bearings and a new oil pump in it would sure wake it up.

 

[KETELS]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

If you replace your injectors I would be interested in where you get them and how much. Also part #.
Thanks

 

[holgo123]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

I think I am going to use these: Ford Racing M-9593-C302 Fuel Injectors 19 lbs Set of 8, Summit Racing has them... I am now contemplating biting the bullet and tearing the whole enigine down... Wouldn't be that much more work... Is there a good source of pistons, rings, bearings and such?

 

[a70eliminator]

Re: Spark Plug ?, What Happened? Some Close up Pictures... Updated

When I first looked at your plug my first thought was a piece of carbon broke loose off the intake valve and jammed itself between the electrodes, after resding all the following posts I still think it was nothing but a chunk of carbon that normaly would have just blown out the exhaust, but in your case the spark plug caught it. If you read the instructions on some of them de-carbonizer solutions there is a warning of loose carbon finding it's way between the electrodes of your plug.