No Hotter Plug?
Thread Starter
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
No Hotter Plug?
I have a problem with the intake valve on several cylinders of my 272 Y-block letting oil into the combustion chamber. (compression test is good) The plugs on four of the eight are black and oily. They have not fouled out yet and I intend to try a hotter plug in those cylinders temporarily until I get around to changing the valve guide covers.
My problem is that the plugs I have are Motorcraft BSF 92. Evidently, this is a defunct number. Autozone sold me the equivelent which they say is an Autolite 46. They claim that this is the hottest plug available for my engine.
Has anybody else tried this temporary fix? And do you know of a plug that might do better to burn off the extra oil?
Thanks, Jag
My problem is that the plugs I have are Motorcraft BSF 92. Evidently, this is a defunct number. Autozone sold me the equivelent which they say is an Autolite 46. They claim that this is the hottest plug available for my engine.
Has anybody else tried this temporary fix? And do you know of a plug that might do better to burn off the extra oil?
Thanks, Jag
Junior User
Joined: Feb 2010
Posts: 68
Likes: 1
From: Denton,MD.
I had one years ago that had sludge in the oil valleys and was submerging the valve guides it also needed valve seals.If all four oily cylinders are on one side pull the valve cover and look. Clean out the oil passages and your consumption and oil foiling should be reduced till you can replace the stem seals. Good luck
Bob
Bob
Freshman User
Joined: Aug 2010
Posts: 48
Likes: 0
From: Near Madison, WI
Which four cylinders are fouling? As above, right or left bank or the four closest to the carb(middle two on each side, float broke or too high floodingthe middle cylinders), for instance??? By advancing the timing 10° you can add 70°c to 100°c (158°f to 212°f) to the spark plug temperature as an option too.
Thread Starter
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
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From: Valley Center, CA
On the driver side I remember that it is the two middles. I don't remember on the passenger side except that the No 1 is not oilly and No 2 is. So, it could be related to the carb also. I'll verify to see if it is also the middles on the pass side.
I'll check to make sure there is no sludge build up in the heads also.
Thanks, Jag
I'll check to make sure there is no sludge build up in the heads also.
Thanks, Jag
Fleet Owner
Joined: Jul 2004
Posts: 27,298
Likes: 1,059
From: NM
Have you by any chance added PCV to your engine?
I can't believe no one has suggested Anti-Foulers, those adapters that shield the plug from the chamber! I would not run hotter plugs even if they were available.
I can't believe no one has suggested Anti-Foulers, those adapters that shield the plug from the chamber! I would not run hotter plugs even if they were available.
Thread Starter
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
Mine is 100% stock, so no PCV valve. I thought about the anti foulers but I haven't actually fouled a plug yet. They are just black and wet. So, I assumed it was oil, but as 53 Meadow Green brought to light, maybe it's the carb causing the combustion temp to be too low in the middles and giving the illusion of an oil film. ?? Jag
Senior User
Joined: Jun 2007
Posts: 394
Likes: 0
From: Springfield, Il
I had my 351C rebuilt and bored to .40 over. This allowed alot more in the cylinder to be burned. I struggled with fouled out plugs until I installed double platinum plugs. Once installed problem solved. Good luck
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Post Fiend
Joined: May 2008
Posts: 7,641
Likes: 21
From: Poway, Ca.
I went to Auto zone to buy spark plugs for my 390. After we wnet through all the year, make model etc etc. (I just love telling them the truth and watching the gears smoke when the computer doesn't act right), they told me what spark plugs went in the engine.
I just happened to bring one of the old ones with me and it was the same number as they recommended.....ok so far.
Then I told them I wanted the next hotter spark plug - they were completely lost! They had no idea how the spark plugs were numbered, if bigger was hotter or colder or what.
I was amazed. Moral of the story is you can get a hotter plug for your truck - you'll just have to find out what the plug number is (usually higher is hotter) and tell them that's what you want.
Unfortunately, I don't think hotter plugs is going to solve your problem here.
I just happened to bring one of the old ones with me and it was the same number as they recommended.....ok so far.
Then I told them I wanted the next hotter spark plug - they were completely lost! They had no idea how the spark plugs were numbered, if bigger was hotter or colder or what.
I was amazed. Moral of the story is you can get a hotter plug for your truck - you'll just have to find out what the plug number is (usually higher is hotter) and tell them that's what you want.
Unfortunately, I don't think hotter plugs is going to solve your problem here.
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Thread Starter
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
Yea, I know that it will ultimately mean replacing the seals, but the cheap side of me wants to try the plug idea.
I'm even thinking of using the new E3 or something comparible to see if it can handle the oil problem better than standard plugs. I have installed an autolite 46 and a Champion 14Y side by side. The first run the Champion looked great but the Autolite is already showing signs of buildup. tonight I'm going to run them after swithing cylinders and see if it's the plug or the cylinder. :-)
Twise, did the platinum stay clean or did it just not foul out?
Jag
I'm even thinking of using the new E3 or something comparible to see if it can handle the oil problem better than standard plugs. I have installed an autolite 46 and a Champion 14Y side by side. The first run the Champion looked great but the Autolite is already showing signs of buildup. tonight I'm going to run them after swithing cylinders and see if it's the plug or the cylinder. :-)
Twise, did the platinum stay clean or did it just not foul out?
Jag
