[HALFWAY]

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.

[steve25]

How many miles are on those plugs and has the engine been rebuilt and in specific has anything be done to the heads?

[HALFWAY]

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.

[Bill Hanlon]

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.

[steve25]

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.

[4zpeed]

Originally Posted by HALFWAY

I am sure I pulled the plugs to inspect and clean them before reinstalling them.

If your going to get a good honest read on cylinders you need to start out with a fresh set acclimated to one cylinder.

It's hard to get a answer that's dependable and accurate switching them around, even if cleaned due to heat, age, etc..


Frank

[moontower69]

rings worn probably or valves not seating

[HALFWAY]

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.

[grandam1979]

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.

[steve25]

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.

[David Jones]

It’s a decades old engine that runs fine. Drive it and enjoy it.

[68WarDog]

FYI

[HALFWAY]

Originally Posted by steve25

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.

I will look into the product you mentioned. It's a 65 326 engine. Did they use nylon covered cam gears in this year. If I remember correctly the 64 engine didn't have that.

[lust4speed]

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.

[mchell]

Originally Posted by HALFWAY

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.

Swear I’ve seen that car around......you get it out to the Englewood show?

As others have mentioned, throw some fresh plugs in and drive it...

[HALFWAY]

Originally Posted by mchell

Swear I’ve seen that car around......you get it out to the Englewood show?

As others have mentioned, throw some fresh plugs in and drive it...

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!

[mchell]

Originally Posted by HALFWAY

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!

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!

[Bruce Meyer]

Originally Posted by lust4speed

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.

I agree with lust4speed. I will add this: Do not put any additives in the oil.

[HALFWAY]

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.

[racegto65]

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