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Old 09-18-2017, 08:34 PM   #21
Saturn Night
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1995 SC2
Default Re: cylinder head modification ideas

Use the NGK BKR6E-11 plug. They have the V-Twin tip, have a higher heat range of 6(stock is 5 for low-speed burning and emissions control). They have all the same specs of the BKR5ESA-11 plug. They are colder for higher-rpm applications.

Ironically, they are the recommended plug for Geo Storm 1.6L engines, which is what I swapped my Throttle Body off of......

...
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Old 09-20-2017, 05:08 PM   #22
2002SL2mp2dohc
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2002 SL1
Default Re: cylinder head modification ideas

So I was wondering can you tell me more about the EGR would that cause the spark plugs to have high speed gazing.
Also I`m not sure if we`re on the same page so just to confirm your talking about ceramic white part on the spark plug, where the end wire slides over or the metal tip where the spark is happening. I`m referring to white part that wire slides over is where I`m getting orange burning type stuff. (think the term I heard use is blow back)

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Old 09-22-2017, 08:45 AM   #23
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Default Re: cylinder head modification ideas

If the issue is within the combustion chamber part of the plug refer to this chart (kinda dated but has the most clear text I could find)


If it's outside the combustion chamber it's either a bad install of the plug, bad plug or bad valve cover gasket.

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Old 09-22-2017, 04:19 PM   #24
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1998 SC2
Default Re: cylinder head modification ideas

Those nice pictures date from the days of flathead engines and rather crude carbs. They provide a gross idea of what might be a problem, indication only.

As to the S-Series DOHC and SOHC the recommended NGK plugs will tend to run on the hot side for most people. The exception is all short trips around town. The NGK heat ranges are the larger number is the colder plug. A 6 is colder than a 5. The SOHC will tolerate 2 steps colder and the DOHC is fine with a single step, a place to start.

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Old 09-23-2017, 07:26 PM   #25
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Default Re: cylinder head modification ideas

Well I think I should try to explain it better, What I'm trying to say is that the problem is outside the combustion chamber. My spark plugs look like these (My apologizes on image size still getting to learn how to post with images)

Last edited by 2002SL2mp2dohc; 09-23-2017 at 07:36 PM..

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Old 09-23-2017, 07:41 PM   #26
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Default Re: cylinder head modification ideas

Quote:
Originally Posted by 2002SL2mp2dohc View Post
Well I think I should try to explain it better, What I'm trying to say is that the problem is outside the combustion chamber. My spark plugs look like these (My apologizes on image size still getting to learn how to post with images)
Car has new valve pan gasket and I put the spark plugs in as tight as I can get them

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Old 09-23-2017, 09:07 PM   #27
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Default Re: cylinder head modification ideas

While fetchitfido's plug chart may be dated, its still a good reference to learn about heat range, damage, excessive oil, lean or rich fuel and additives. There's always a learning curve. To back up plug charts shown, here's a link to NGK's site and videos about plugs; https://www.ngksparkplugs.com/about-ngk/videos.

BTW, when posting images, try posting the heart of the matter. In this case, showing the plug firing ends so a better view of the center porcelain/electrode tip reveals ceramic discoloration. Use the plug chart images as examples of how to display yours.

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Old 09-24-2017, 09:20 AM   #28
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1998 SC2
Default Re: cylinder head modification ideas

Those fine center electrode tipped plugs will never function correctly in these engines.

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Old 09-24-2017, 09:02 PM   #29
Saturn Night
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Default Re: cylinder head modification ideas

Looks like you have some oil on the boots and it possibly burned into the ceramics. Those plugs don't look to be correct for a Saturn 1.9L engine.

I had my #3 cylinder come out, looking like that, or maybe it was #2. I now there was some residual oil left in the well, from when I replaced the valve cover gasket last year.

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Old 11-08-2017, 05:31 PM   #30
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2002 SL1
Default Re: cylinder head modification ideas

Source yourself a 1st gen, 5bolt head with Flat Face valves and get yourself a header.

If you can find one in the junkyard with the valve cover still on, pull it, lap the valves, maybe change the valve stem seals, and call it a day.

/cheap, simple improvements

Of course you'll have to change about 10-15 different other things to complete that swap. lol
Have fun.

...
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Last edited by AlexofNazareth; 11-08-2017 at 05:41 PM..

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