Guess what.the original OE AC DELCOS were BOSCH's. Both of us had to change plugs before 50k miles due to misfires. Most modern spark plugs should have a coating (zinc on NGKs) the prevent them from bonding to the head. One of those 0.99 packs at the parts counter will do a whole car. The nickel coating on most modern spark plugs provides added protection from seizing in aluminum cylinder heads and has made anti-seize less important in spark plug installations. I just have good luck with the Autolites and they were actually better than the OE Delcos in both my and my dad's 2008 CTS's with the DI 3.6. You DO need to put slide pin grease on the caliper slide pins though. NGK is a business they are just tryin to prevent lawsuits by not recommending anti-seize as wrench monkey will 1) apply too much anti-seize, 2) over-tighten 3) bread the plug/strip- thread due to combination of 1-2 and then turn around and try to blame in on NGK for recommending to put on anti-seize on their directions. I have to admit that you are absolutely right and I know this and agree. At $3 for iridiums AcDelcos I'm tempted to buy a set although I don't need really need plugs. Will let others speak for dielectric grease. Imo, no anti-seize and proper torque (23ftlb give or take a ftlb) should present no problems. $2 off iridium and you can get them for as low as $5. In fact, pretty sure it is overtly discouraged by NGK.at least for the BKR6EQUP that I’ve used. There's a mail-in rebate on ACDelco plugs. I always like to use OE parts when the price is reasonable. Both fit and work but only the first one is OE. NGK claims no anti-seize should be used as it can cause one to over torque the plugs. Learn more from Brake & Front End Editor Andr. It's not too different from choosing an ACDelco classic oil filter vs a FRAM. Anti-seize shouldn’t be used on all spark plugs, which could come as a surprise to some DIYers and technicians. I would only goop the stuff on the plugs if you have a Diesel. GM could've used Autolites or some other at probably lower cost but chose the NGK design. NGK doesnt recommend anti seize on there plugs Nope, they specifically advise against it. With the length of the wrench by the time you figure out its too much, its too much and the threads are stripped. I just dont trust a 10 HF torque wrench for aluminum heads ( only lugnuts). This likely wasn't a problem in the leaded-gas days when the debate was whether to change plugs twice a year or every 10K miles. I tighten by feel on spark plugs, i use a small dabof anti-seize on every plug including ngk. By way of contrast, I've run into seized-in factory plugs (admittedly not NGK) on friends' vehicles. Thus, NGK states if you feel you must use anti-sieze, it is very important to reduce the torque by 20 from the specification, so as. Yes, you should put anti-seize on spark plugs in aluminum heads. The chromium threads not only reduce corrosion so the spark plug will be easier to remove in the future, but also reduce friction when installing the plug. You know it not just fits exactly right but is also the exact same heat range and durability has been verified. I always use NGK plugs, and always add a wee bit of anti-seize. In fact, NGK strongly advises against using anti-sieze. But the way I look at it is I'd rather have the OE plug (or in this case, also the NGK) for my own vehicle or where possible. but I ordered the following from Amazon:ĭenso (3421) SK20HR11 Iridium Long Life Spark Plug, Single Plug Gap 0.I don't think there's anything wrong with Autolite or Champion plugs.
0 Comments
Leave a Reply. |