JapCarForum Car Manufacturers Lexus/Toyota IS200 / IS300 / SPORTCROSS / Altezza What does it mean if my spark plug looks like this...

What does it mean if my spark plug looks like this...

What does it mean if my spark plug looks like this...

sprinter2012
Posting Freak
2,484
10-06-2018, 11:08 AM
#1
Changed my spark plugs today, not sure if they needed to be changed or not but can't hurt if not. Changed them to Denso IK20's.

However when I took out one of the plugs it looked like this...

[Image: DSC00474.jpg]

It didn't take as much force to undo this one either, so was it just loose and got covered in oil?
Edited 22-07-2011, 08:42 PM by sprinter2012.
sprinter2012
10-06-2018, 11:08 AM #1

Changed my spark plugs today, not sure if they needed to be changed or not but can't hurt if not. Changed them to Denso IK20's.

However when I took out one of the plugs it looked like this...

[Image: DSC00474.jpg]

It didn't take as much force to undo this one either, so was it just loose and got covered in oil?

Sparkystav
Administrator
14,683
10-06-2018, 11:16 AM
#2
which one was it?

looks reasonable dry at the bottom so coming from the top?

OutlawJapClub Admin Team
Sparkystav
10-06-2018, 11:16 AM #2

which one was it?

looks reasonable dry at the bottom so coming from the top?


OutlawJapClub Admin Team

sprinter2012
Posting Freak
2,484
10-06-2018, 11:22 AM
#3
It was number 4 if you count from the front (nearest the radiator).

It was oily all the way down but some of it rubbed of because I was putting the protecter caps from the new plugs onto the old ones as I changed them.

And the rubber part of the coil pack had a lump of congealed oil stuck on the very bottom of it too.

However using my CSI skills I could tell from the pattern of splatter (getting finer the higher it went) that at some point it looks as if some oil has sort of...poofed out from around the thread or something
sprinter2012
10-06-2018, 11:22 AM #3

It was number 4 if you count from the front (nearest the radiator).

It was oily all the way down but some of it rubbed of because I was putting the protecter caps from the new plugs onto the old ones as I changed them.

And the rubber part of the coil pack had a lump of congealed oil stuck on the very bottom of it too.

However using my CSI skills I could tell from the pattern of splatter (getting finer the higher it went) that at some point it looks as if some oil has sort of...poofed out from around the thread or something

Tango
Senior Member
314
10-06-2018, 11:32 AM
#4
It's more likely oil spillage pooling around the plug, and if the plug was loose as you say it was, the compression from the cylinder has leaked around the thread and caused the spray pattern.
Edited 22-07-2011, 09:07 PM by Tango.

IS 200 Sport with a few mods, Standardish IS-F. The IS250 SE-L with a few mods has gone to a new home.[SIGPIC][/SIGPIC]
Tango
10-06-2018, 11:32 AM #4

It's more likely oil spillage pooling around the plug, and if the plug was loose as you say it was, the compression from the cylinder has leaked around the thread and caused the spray pattern.


IS 200 Sport with a few mods, Standardish IS-F. The IS250 SE-L with a few mods has gone to a new home.[SIGPIC][/SIGPIC]

ormi
Posting Freak
3,006
11-06-2018, 01:54 PM
#5
or the most likley your rocker cover gasket is leaking....

[Image: ormiedit1-2.jpg]
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more
ormi
11-06-2018, 01:54 PM #5

or the most likley your rocker cover gasket is leaking....


[Image: ormiedit1-2.jpg]
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more

sprinter2012
Posting Freak
2,484
11-06-2018, 02:17 PM
#6
ormi or the most likley your rocker cover gasket is leaking....

What's the best plan of action then? Is it something I need to look at soon?

Or do I just wait and see if anything else happens that confirms thats what it is?
sprinter2012
11-06-2018, 02:17 PM #6

ormi or the most likley your rocker cover gasket is leaking....

What's the best plan of action then? Is it something I need to look at soon?

Or do I just wait and see if anything else happens that confirms thats what it is?

mplavery
Posting Freak
906
12-06-2018, 09:04 AM
#7
ormi or the most likley your rocker cover gasket is leaking....

My guess too

[SIGPIC][/SIGPIC]
[COLOR="Orange"]JAPANESE PERFORMANCE FEATURE SEPT 2011 Big Grin

BEST OVERALL SUPRA WINNER ACE CAFE 23/06/11

2nd BEST IN SHOW (JAE 2011)

3rd BEST MODIFIED (JAE 2011)


[/COLOR]
[COLOR="Orange"]See my build thread here
[/COLOR]
http://www.outlawjapclub.co.uk/forum/sho...php?t=5851
mplavery
12-06-2018, 09:04 AM #7

ormi or the most likley your rocker cover gasket is leaking....

My guess too


[SIGPIC][/SIGPIC]
[COLOR="Orange"]JAPANESE PERFORMANCE FEATURE SEPT 2011 Big Grin

BEST OVERALL SUPRA WINNER ACE CAFE 23/06/11

2nd BEST IN SHOW (JAE 2011)

3rd BEST MODIFIED (JAE 2011)


[/COLOR]
[COLOR="Orange"]See my build thread here
[/COLOR]
http://www.outlawjapclub.co.uk/forum/sho...php?t=5851

ormi
Posting Freak
3,006
12-06-2018, 02:23 PM
#8
Na itll be ok just keep an eye on it...but from what I see it's not bad enough to worry about

[Image: ormiedit1-2.jpg]
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more
ormi
12-06-2018, 02:23 PM #8

Na itll be ok just keep an eye on it...but from what I see it's not bad enough to worry about


[Image: ormiedit1-2.jpg]
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more

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