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#1
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Quick plug diagnosis
I did some tune up today and replaced my plugs, points, filters and oil. I put the plugs in order.
Anything look suspicious? Engine seemed to be running fine, no smoke. 326, 2bbl, 4 speed.
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I don't always cross thread the bolt - but when I do I run that bitch in with an impact until it's tight! |
#2
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How many miles are on those plugs and has the engine been rebuilt and in specific has anything be done to the heads?
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#3
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I can't say for sure on how many miles on the plugs. I replaced the original engine with one that had around 65k on it and put around 2k on the plugs that were already in it. I am sure I pulled the plugs to inspect and clean them before reinstalling them.
The engine is stock and as far as know the heads have not been off.
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I don't always cross thread the bolt - but when I do I run that bitch in with an impact until it's tight! |
#4
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1, 6 and 8 look like they've been running a bit lean or hot. 2, 4 and 5 look pretty normal. 3 and 7 look to be running a bit rich or cool. Just an amateur's opinion.
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My Pontiac is a '57 GMC with its original 347" Pontiac V8 and dual-range Hydra-Matic. |
#5
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I would want all the plugs to look like the first on in your first photo, the last plug in your number 2 photo looks to be on the lean side.
The deposits I see on most of your other plugs are telling me it’s time to install new valve stem O ring seals and add a can of Restore additive with the next oil change.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#6
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Quote:
It's hard to get a answer that's dependable and accurate switching them around, even if cleaned due to heat, age, etc.. Frank
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Poncho Huggen, Gear Snatchen, Posi Piro. |
#7
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3 5 and 7 have issues, look at those deposits
rings worn probably or valves not seating
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1974 Lemans Sportecoupe GT (daily driver) "Well the girls out there knock me out, you know Cruisin' around in my GTO" Rock 'n' Roll High School Ramones |
#8
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Thanks for the info. I will run the new plugs for a while and then take a look.
I did add Rislone engine treatment to this oil change and the previous one. Like I mentioned no smoke or blow by, seems to have plenty of pep and sounds tight.
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I don't always cross thread the bolt - but when I do I run that bitch in with an impact until it's tight! |
#9
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If I pulled those plugs from a 50 year old engine that still runs ok I wouldn’t worry at all give it a tune up and drive it. Check plugs again in a thousand Miles.
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#10
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Rislone is nothing like the product I posted about called Restore!
In fact Rislone used in old motors that may have not been maintained that well can free up a bunch of crap off of the bottom of the oil pan, lifter valley and oil galleys and produce other problems like a hung up check ball in your oil pump and ware grit that will now once again flow thru the crank case and chew up the cylinder walls and rings. While your checking things and since you don’t know much history about the motor I would read up on how to do a simple test out of your timing chain because if the motor still has its stock nylon covered Cam gear it may be well on the way to failing which is the normal case once a motor gets over 50k miles on it.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#11
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It’s a decades old engine that runs fine. Drive it and enjoy it.
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frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. |
The Following User Says Thank You to David Jones For This Useful Post: | ||
#12
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Plugs
FYI
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The Following User Says Thank You to 68WarDog For This Useful Post: | ||
#13
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Quote:
__________________
I don't always cross thread the bolt - but when I do I run that bitch in with an impact until it's tight! |
#14
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It looks like plugs are also simply wore out. Some center electrodes are well rounded which really makes it hard to get a good spark. I'd toss in a new set and do an inspection after maybe 50 miles or so. On first look I thought possibly we had different heat ranges of plugs installed, but think it's just old age. Nice combination of too clean, about right, and almost fouled.
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Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress. |
#15
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Quote:
As others have mentioned, throw some fresh plugs in and drive it...
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
#16
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I live in Port Charlotte, I don't show the car but I drive it around and Englewood is an area I visit once in a while!
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I don't always cross thread the bolt - but when I do I run that bitch in with an impact until it's tight! |
#17
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Well.....I’m in your area....say hey if you happen to stumble across a gold 71.......always nice to see some old Pontiac’s out cruising!
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
#18
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Quote:
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http://www.machdevelopment.com/album...775/527566.htm |
#19
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While I have the car disabled for a pulley issue, I decided to pull the new plugs for a quick diagnosis.
I have around 200 miles on them, mostly just around town but have had a few trips where I got it to 60mph, wooo.
__________________
I don't always cross thread the bolt - but when I do I run that bitch in with an impact until it's tight! |
#20
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Video from Steve Morris Engines on proper plug reading. Explains fuel and timing settings from correct readings
https://www.bing.com/videos/search?q...tail&FORM=VIRE |
The Following User Says Thank You to racegto65 For This Useful Post: | ||
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