New at all this
Author
Discussion

Eric1066

Original Poster:

8 posts

56 months

Wednesday 23rd February 2022
quotequote all
Hi,
I'm trying to learn, all by myself, as no big brother or a dad that has any idea... Lol.

So, wanted to ask a question. I bought an 13 year old car with no service history. Decided I would use this to learn on and service myself. Having no idea what state it was in, I changed the air filter, even though the one in there looked pretty clean, so maybe they had serviced it?? Anyway, i decided to change the Spark plugs, because even though I could have taken them out to look at them, I wouldn't have a clue as to what I am looking at. So I have picture here and if someone can let me know what they think. We're these still pretty good? I know it's good to change them and they have been, but I want to learn as to what I'm looking at, if you know what I mean.

Anyways, any help greatly appreciated.
Eric


Pit Pony

11,379 posts

151 months

Wednesday 23rd February 2022
quotequote all
Any car I own, I always replace the spark plugs with OE items within a few weeks of getting them. They last so long that most people don't bother, but it always results in a smoother engine. Last time was a car with a full history on £40k. Looked to be 10 years old and thier when it was new.

shalmaneser

6,452 posts

225 months

Wednesday 23rd February 2022
quotequote all
Those plugs look pretty new to me! Worthwhile doing it for the experience though, it's cheap insurance to change all the fluids, fliters and plugs on a new car.

Polly Grigora

11,209 posts

139 months

Wednesday 23rd February 2022
quotequote all
Plug doesn't look new to me, looks like it's ready for the bin

HJG

663 posts

137 months

Wednesday 23rd February 2022
quotequote all
To me the plug shows the engine is running normally. Plenty of images online if you Google 'reading spark plugs'.

Eric1066

Original Poster:

8 posts

56 months

Wednesday 23rd February 2022
quotequote all
Thanks all!!

And I'll check google too.

GreenV8S

31,024 posts

314 months

Wednesday 23rd February 2022
quotequote all
Make sure you know and follow the procedure for tightening spark plugs correctly - and be aware that it's usually different when refitting used plugs. They have a crush sealing washer so it is not as simple as tighening any ordinary bolt.

Also make sure you always thread the plugs in by hand and only use a spanner for the final tighten. If you insert them using a socket it's very easy to cross-thread them and do a lot of damage.

Check whether the plugs need to be gapped before fitting.

Use the manual to determine what spec of plug is needed - don't assume that what was fitted previously is correct.


Pit Pony

11,379 posts

151 months

Wednesday 23rd February 2022
quotequote all
GreenV8S said:
Make sure you know and follow the procedure for tightening spark plugs correctly - and be aware that it's usually different when refitting used plugs. They have a crush sealing washer so it is not as simple as tighening any ordinary bolt.

Also make sure you always thread the plugs in by hand and only use a spanner for the final tighten. If you insert them using a socket it's very easy to cross-thread them and do a lot of damage.

Check whether the plugs need to be gapped before fitting.

Use the manual to determine what spec of plug is needed - don't assume that what was fitted previously is correct.
And don't assume that Euro Crap parts, Hellfrauds or GSF will list them correctly.

paintman

7,860 posts

220 months

Wednesday 23rd February 2022
quotequote all
If the plugs are in a deep recess push a piece of rubber or plastic tube over the top & use that to start the plugs in the threads.
Once they've started then finish with a socket.
Considerably reduces the chance of cross threading.

When removing plugs if your socket doesn't have an insert to help lift the fully unscrewed plug out of a deep recess you can use the tube to get the plug out.

Be aware that some plugs still have screw caps so don't unscrew them if you use the tube.

MattyD803

2,424 posts

95 months

Wednesday 23rd February 2022
quotequote all
Pit Pony said:
And don't assume that Euro Crap parts, Hellfrauds or GSF will list them correctly.
Absolutely this, and goes the same for any manner of filter or service item.

In my experience, with spark plugs, try and find NGK or DENSO plug code from either the car manufacturer parts catalogue or the spark plug company online catalogues, such that you can double check yourself.

CrutyRammers

13,735 posts

228 months

Wednesday 23rd February 2022
quotequote all
Polly Grigora said:
Plug doesn't look new to me, looks like it's ready for the bin
What makes you say that?

Polly Grigora

11,209 posts

139 months

Wednesday 23rd February 2022
quotequote all
CrutyRammers said:
Polly Grigora said:
Plug doesn't look new to me, looks like it's ready for the bin
What makes you say that?
Good question

The build-up of particles on the electrodes is substantial and will cause voltage tracking in the near future as more build-up occurs

Eric1066

Original Poster:

8 posts

56 months

Wednesday 23rd February 2022
quotequote all
GreenV8S said:
Make sure you know and follow the procedure for tightening spark plugs correctly - and be aware that it's usually different when refitting used plugs. They have a crush sealing washer so it is not as simple as tighening any ordinary bolt.

Also make sure you always thread the plugs in by hand and only use a spanner for the final tighten. If you insert them using a socket it's very easy to cross-thread them and do a lot of damage.

Check whether the plugs need to be gapped before fitting.

Use the manual to determine what spec of plug is needed - don't assume that what was fitted previously is correct.
Thanks, I got the part number from NGK website and it said it was pre-gapped. I don't have a tool to check, but I didnt even consider it honestly. I've installed them and it seems to be ok, but then again, what do I know 🤣🤣 I'm guessing an experienced person might be able to tell by noise, but seems all good.

Pit Pony

11,379 posts

151 months

Wednesday 23rd February 2022
quotequote all
Eric1066 said:
Thanks, I got the part number from NGK website and it said it was pre-gapped. I don't have a tool to check, but I didnt even consider it honestly. I've installed them and it seems to be ok, but then again, what do I know ???? I'm guessing an experienced person might be able to tell by noise, but seems all good.
When you say tool to check, you mean feeler gauges. Can't say I've used them in 10 years. The manufacturing consistency is much better than it was. Used to use them every other bloody week when I had a 2 stroke motorbike in The 1980s. Plugs out, wire brush, quick clean up with emery cloth, regap and refit with torque wrench.