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  #16 (permalink)  
Old 09-30-2013, 09:33 PM
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Only an idiot would use STP or motor honey, etc. in a new engine anyway. It is not needed or wanted, it has no place in an engine w/good bearing clearances, and is dubious for use in ANY engine regardless of the clearances or ring condition. If more viscosity is needed, buy the right oil from the beginning instead of adding that crap. If the engine is burning oil- fix it. Using super thick motor oil is a waste.

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  #17 (permalink)  
Old 09-30-2013, 09:56 PM
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My Dad use swear the sun wouldn't rise if he didn't add a can of STP @ every oil change.LOL.After all,Richard Petty said to do it.It had to be good for it.When we tore down the 390 out of his 70 LTD,it wuz 1 of the cruddiest nastiest engines,i've ever seen.The Quaker State Non-Detergent prolly helped out with that also.He thought the valve cover gaskets were shot becuz they were leaking,but,the drainback holes were completely stopped up.In another 20 yrs,everything we do now will be wrong & condemned by the by then wiser motorheads.There were also alotta new engines screwed up by Slik 50.
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Old 09-30-2013, 09:56 PM
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Seems we all agree after all
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Old 09-30-2013, 10:06 PM
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Seems we all agree after all
And life is good.
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  #20 (permalink)  
Old 09-30-2013, 11:35 PM
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Originally Posted by jokerZ71 View Post
My Dad use swear the sun wouldn't rise if he didn't add a can of STP @ every oil change.LOL.After all,Richard Petty said to do it.It had to be good for it.When we tore down the 390 out of his 70 LTD,it wuz 1 of the cruddiest nastiest engines,i've ever seen.The Quaker State Non-Detergent prolly helped out with that also.He thought the valve cover gaskets were shot becuz they were leaking,but,the drainback holes were completely stopped up.In another 20 yrs,everything we do now will be wrong & condemned by the by then wiser motorheads.There were also alotta new engines screwed up by Slik 50.
I got a old newspaper ad from 1900 + something that says doctors recommend CravenA cigarettes for their "soothing effect on the throat - good for singers and public speakers" ...LOL! ..so there ya go!

Anyways, I just pulled the plugs and post some pics. For sum reason I can't seem to attach more than one pic per post, oh well, get my post count up! LOL

They look a bit chitty. Most have a good side and a bad side, crud-wise.

Valve seals look to be in one piece as fitted. Damn hard to see those things with my eyes through two layers of springs, even with a torch and a dentist's mirror. I'm using the Fel-Pro SS 72526 and 527 seal sets on the exhaust and intake valves respectively , in conjunction with the little rubber o-rings on both IIRC, certainly on the intakes.

What's y'all's forensic opinion of the plugs? They're 4000 miles old.

Guess a leakdown is next on the list. Not keen on pulling the inlet at this stage, - but whatever it takes? Got some Ajax in the laundry - lol!



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Old 09-30-2013, 11:37 PM
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Each plug has a goo and a bad side.
This is the good side.



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Old 09-30-2013, 11:39 PM
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This is the bad side



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  #23 (permalink)  
Old 10-01-2013, 12:23 AM
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Yep, got ash build up from oil burning
#6 is pretty bad, don't normally see that much build up below 80~100,000 miles (but then it's all of them)
OK, looked at all the pics, you have a problem
If you had motor idling after a run (at night) find a dark area then use a powerful flashlight from behind car, oil burning is obvious from the blue 'haze'
Did you oil rings and bores?
It's 'common practice' but it doesn't mean it's the best way to build an engine
I 'paint' a line of 50/50 molyslip/engine oil around bottom 1" of cylinder and fit pistons 'dry'
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  #24 (permalink)  
Old 10-01-2013, 01:32 AM
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You can mark the plug's position w/a sharpie after re-tightening them in the holes they came from, then remove them to see if the bad sides are aiming at the intake guides. This is often the case when you have a good side/bad side scenario. This is similar to indexing plugs except in this case you are looking for the position of the bad sides as opposed to aligning the electrodes.

Take a close look to see if the seals have been hit by the retainers.
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Old 10-01-2013, 01:38 AM
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Plugs were pulled after idle ing through my hometown, not after a WOT pass , if that matters.

Should I do a leak down test next / first ? THEN pull the inlet for gasket inspection?

I'm guessing that I shouldn't keep running the engine as it is.

Is a leak down test of any consequence ? Will that determine the cause, beit rings or manifold leak? Or should I just pull the bloody thing down?



Duke
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Old 10-01-2013, 01:41 AM
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Quote:
Originally Posted by cobalt327 View Post
You can mark the plug's position w/a sharpie after re-tightening them in the holes they came from, then remove them to see if the bad sides are aiming at the intake guides. This is often the case when you have a good side/bad side scenario. This is similar to indexing plugs except in this case you are looking for the position of the bad sides as opposed to aligning the electrodes.

Take a close look to see if the seals have been hit by the retainers.
If I do that, and the bad side is aim towards the intake, does that exercise/result indicate a intake leak?

I'll take a closer look at the seals.

Thankyou



Duke
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  #27 (permalink)  
Old 10-01-2013, 01:46 AM
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If I do that, and the bad side is aim towards the intake, does that exercise/result indicate a intake leak?

I'll take a closer look at the seals.

Thankyou



Duke
It would be telling on the intake valve guides or seals (less likely to be the exhaust side) for passing oil. If it were to be the intake gasket, say, I wouldn't think they'd ALL show the same amount of fouling and on both sides equally, and it wouldn't be as well defined where the good and bad sides of the plugs are.
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  #28 (permalink)  
Old 10-01-2013, 01:50 AM
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Sorry- I just now was able to see them enlarged. It looks like the others have said- not all are bad and the worse ones could be from a leaking gasket. I'd still want to see if they're pointing right at a guide, though.
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  #29 (permalink)  
Old 10-01-2013, 01:55 AM
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I changed the settings a bit. 6 and 7 look the worse to me, some oil on others as well. Some of the deposits could even be from the over abundance of ZDDP. Octane booster will sometimes ash up the plugs depending on the product. Hopefully the oil fouling didn't cause detonation bad enough to pinch the rings in the lands. I don't think it did but it would be nice to get a good look at the bores as suggested...


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  #30 (permalink)  
Old 10-01-2013, 02:31 AM
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Quote:
Originally Posted by jokerZ71 View Post
My Dad use swear the sun wouldn't rise if he didn't add a can of STP @ every oil change.LOL.After all,Richard Petty said to do it.It had to be good for it.When we tore down the 390 out of his 70 LTD,it wuz 1 of the cruddiest nastiest engines,i've ever seen.The Quaker State Non-Detergent prolly helped out with that also.He thought the valve cover gaskets were shot becuz they were leaking,but,the drainback holes were completely stopped up.In another 20 yrs,everything we do now will be wrong & condemned by the by then wiser motorheads.There were also alotta new engines screwed up by Slik 50.
I worded that pretty harshly, I didn't mean to disrespect anyone especially not parents. You make some good points- I forget how convincing the advertising for STP was back then. And my own Dad used it at least a few times when it first came out. And we even did the screwdriver "test" lol.

Talk about snake oil salesmen- how convincing were (are?) the Slick50 infomercials?!? Haven't seen one of them for quite some time now, I seem to recall some sort of fedgov restrictions put on them but I could be mistaken. But anyone who can convince the public their concoction will soak right into solid steel has to be good. And the stuff is still on the shelves... and it ain't cheap by any means.

And I also agree there's little doubt future gearheads will scoff at much of what we hold as gospel!
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