carl0s Posted December 22, 2005 Share Posted December 22, 2005 Can anyone please tell me.. how do these look? They've been in the car (a UK spec BPU) for a slightly extended period. I'm presuming number 6 is closest to the bulkhead, and number 1 nearest the front bumper. http://www.css-networks.com/plugs.jpg Link to comment Share on other sites More sharing options...
Todd Posted December 23, 2005 Share Posted December 23, 2005 Look fine to me but I've found this good for reference http://www.centuryperformance.com/spark2.asp Sure it's stolen from the haynes manuals but what the eck! Link to comment Share on other sites More sharing options...
carl0s Posted December 23, 2005 Author Share Posted December 23, 2005 Good stuff! Cheers Link to comment Share on other sites More sharing options...
absz Posted December 23, 2005 Share Posted December 23, 2005 number 4 seems shorter than the others:D Link to comment Share on other sites More sharing options...
Alex Posted December 23, 2005 Share Posted December 23, 2005 You can't really read anything off of spark plugs in use in an unleaded petrol engine...all you can tell is that it's not overfueling to the point of clogging the spark plugs up. Though what the hell is a BKR7EVX?? Anyone? BKR7E (6097's) should be used, normally, are these special in someway? Link to comment Share on other sites More sharing options...
Guest chiefvinso Posted December 23, 2005 Share Posted December 23, 2005 The tip of no 1 looks bent over, was this after you pulled it out? Otherwise they all look pretty clean, however were they all put in at the same time? How long have they been in 15,000miles? Link to comment Share on other sites More sharing options...
JohnA Posted December 23, 2005 Share Posted December 23, 2005 Spark plug reading (for turbos) is only ever useful if something is waaaaaay off inside the engine, by which time you'd know about it already. N/A engines are easier to troubleshoot as you can switch them off at full throttle and read the plugs. With wideband and EGT displays this is now becoming a lost art (if it ever *was* an art) Link to comment Share on other sites More sharing options...
carl0s Posted December 23, 2005 Author Share Posted December 23, 2005 Though what the hell is a BKR7EVX?? They are what Pete Betts recommended more than once, and seem to have run the car very well for the last year! I did however read that you said for some reason platinum-tipped wasn't a good idea. Anyway, they are BKR7 'E' I think means platinum centre-electrode and VX means it is the very fine VX tip. Link to comment Share on other sites More sharing options...
carl0s Posted December 23, 2005 Author Share Posted December 23, 2005 The tip of no 1 looks bent over, was this after you pulled it out? Otherwise they all look pretty clean, however were they all put in at the same time? How long have they been in 15,000miles? Actually slightly more than 15k. I must have bent no1 on removal as I checked them with my torch as soon as they came out and I'm sure I'd've noticed that. They did all go in at the same time. Link to comment Share on other sites More sharing options...
carl0s Posted December 23, 2005 Author Share Posted December 23, 2005 Aka 3544 Link to comment Share on other sites More sharing options...
carl0s Posted December 23, 2005 Author Share Posted December 23, 2005 I've no idea why the nuts are more oxidised on all except no5. Must be when I jetwashed the engine bay Link to comment Share on other sites More sharing options...
carl0s Posted December 23, 2005 Author Share Posted December 23, 2005 Spark plug reading (for turbos) is only ever useful if something is waaaaaay off inside the engine, by which time you'd know about it already. N/A engines are easier to troubleshoot as you can switch them off at full throttle and read the plugs. With wideband and EGT displays this is now becoming a lost art (if it ever *was* an art) Well I guess it shows that I haven't had any catastrophic detonation, but I didn't really need any help in seeing that. I've got to fit a wideband some day soon.. Link to comment Share on other sites More sharing options...
markrzs Posted December 23, 2005 Share Posted December 23, 2005 Numbers 1 & 5 look newer than the rest Link to comment Share on other sites More sharing options...
JohnA Posted December 23, 2005 Share Posted December 23, 2005 Well I guess it shows that I haven't had any catastrophic detonation.. exactly Link to comment Share on other sites More sharing options...
bedlam Posted December 23, 2005 Share Posted December 23, 2005 I did however read that you said for some reason platinum-tipped wasn't a good idea. Thats because platinum wont realease the heat as fast as copper will . Link to comment Share on other sites More sharing options...
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