spark plug change

[predator]

Want a guide? this is for 33.

1. Remove all hoses to intake pipe (circled in yellow). Generally use pliers to pull together the clips, and pull the hoses with some force to pop them off. Use pliers on the big bastard clip (circled in red) and biggest hose pipe to squeeze together then back up the hose. Then should be easy to pull the hose off

2. Use socket and screwdrivers to undo metal hose clamps holding the rubber joiners (circled in purple/pink) to the intake pipe - that smaller metal pipe that goes into your intake plenum (labelled).

3. Remove two bolts holding intake to engine (circled in aqua/light blue) using either philips head screw-driver or correct sized socket (easier)

4. May require a bit of a "wiggle" to lever out. Check to see if any hoses are still attached if it refuses to come out and remove these.

5. Unclip 2x plugs to ignition block (r33 series1 .. not on series2) - I've circled them in orange. . Thats the thing on stilts at the back of the plastic spark plug cover (the thing that says nissan 2500).

6. Use hex tools to remove the screws to the plastic cover (these are circled in green) once the intake pipe has been removed. Try Dick Smiths to buy a kit with all funny little screw things you might find on any car or electronic device.

7. Loosen screws for cam breather hose (circled in blue). Remove cam breather hose.

8. Slide the plastic cover out.

9. Use 9mm socket to remove 2x bolts for each ignition coil (those plastic blobby things with clips going to them). They're on diagonal corners to each other.

10. Use some nice force to pull coil directly upwards. Ignition coil should go "pop". Should see ass of spark plug

11. Go to repco/bunnings/etc and get long socket that can go over stuff like spark plugs.. long nuts, etc. Plugs are 16mm threads and require a 16mm socket. You can generally buy a "spark plug socket kit" for $10 from repco which has all the spark plug sockets all you'd encounter on any car out there.

12. Buy a socket extender.. Allows you to attach the socket to a "stick" that goes down into long holes with your wratchet.

13. use extender plus long socket of the correct size to unscrew the plug. Look at plug to see condition:

white = cylinder is running lean (too much air).. not good.. tell tuner this to adjust your mixtures.

dead black = cylinder is running possibly too rich (too much fuel).. not good..means unclean spark if too dirty. Called "fouling". Black is better than white though, generally your motor will cope with a rich mixture, rather than lean.

lightish grey - quite nice. Engine is probably well within good running range. Plugs may not need replacing unless they look obviously old/ratty.

14. Go to Repco.. Ask for 6x new spark plugs (search maintenance for which ones you want.. 50 threads on this).

15. Gap plug to correct length.. use feeler guage ($5 from bunnings, repco, etc) to insert the correct distance "fingers" underneath to equal desired gap (0.8mm is good). They are basically just little metal measures that count out millimeters to go under stuff. Use hammer to ever so slightly tap the end of the plug down until the end sits its flat on the feeler guage. This is now correctly gapped and ready to go in.

16. Screw plug back in, making sure not excessive force, but they must be tight and well in.

17. Move to next plug, etc.

18. Put everything back, basically reverse of the above.

tHere, 2 minute guide.

p.s. isn't there a guide up already?

[inark]

for the average fool such as myself words dont help much and arent too descriptive... u generally have to have an idea about what u are doing and what certain things mean...

BTW that is WRONG.... the spark plugs in skylines are 16MM.

[predator]

i did say I *think* they are 14mm.. i'll edit. Even a written description is better than nothing. Its slightly hard to illustrate from a photo how to do some of these things anyhow. I can circle them I guess.

[WLD747]

Thanks PREDATOR, for the spark plug guide. I followed it step by step and managed to change my plugs in an 1 hour and a bit. I changed em to coppers from platinums and the coppers are so much better. Ive changed to a colder plug the BCPRK7E-11 which were gapped to 0.80. The car feels much stronger, maybe due to the plug being a better spark generator than the platinums.

If anyone needs hand with their plugs, pm me and im willing to help.

Cheers

AK