Trust me, many of you are fine with the stock heat range, especially if you upgraded your cooling system, such as installing a colder thermostat. Go take out your stock heat range plug and "read" them. You can "read" a spark plug to see if it's running too hot or not. The only reason to run colder plugs is if you are experiencing preignition issues. In fact, performance maybe worse with these colder plugs because they can foul easier. there is ZERO performance benefit running colder plugs on a MSP with bolt ons. They did it because they turned up the boost or their car is "faster". One other thing I noticed here is too many people switched to running colder plugs without a legitimate reason. No iridium or platinum versions available. Not necessary below at least 20psi or street applications! Good only for 10000 miles Iridium only plugs such as the Denso Iridium Power is not listed because they do not last long with the MSP's waste spark system since the ground electrode is just a conventional nickel alloyĬolder type, nickel "copper" alloy only. There is no NGK equivalent as their iridium plugs that work in our cars are pregapped to 1.1mm (.042") Long life iridium replacement (iridium tipped, platinum ground electrode), stock heat range, Good for at least 75000 miles: Single platinum plugs such as the NGK G-Power are not listed because they are lesser than stock and do not last long with the MSP's waste spark system since the ground electrode is just a conventional nickel alloy The list is accurate as opposed to the 2003 Protege one. Those 3 spark plugs listed are listed under the 2002 Millenia supercharged. Stock replacement (dual platinum), 100% Mazda approved, Good for at least 30000 miles: Tightening torque spec: 10-14Nm or 1.0-1.4kgfm or 7.4-10.3ft lbs (less than non-turbo Protege). All are pregapped to the correct 0.8mm (.032"). This is a list of Mazda approved spark plug brands. That is just one issue, but the most important reason why it is a bad idea is you can cause the ground electrode to go off center, causing diminished performance, reliability, and longevity. Many of us have done this in the past but it is a great inconvenience. In fact, NGK and Denso do not recommend regapping iridium plugs because of this. What's wrong with regapping spark plugs? It wastes time, you risk damaging the electrodes of the fine tipped platinum or iridium plugs. It has been common practice to reduce the spark plug gap for a turbo or supercharged engine to prevent "spark blow out" and reduce the strain on the ignition coils. But in a MSP, due to boost pressures and additional heat, this causes the ignition coils to work harder and wear out prematurely since greater spark voltage is required to ignite a spark plug in turbo engine. Initially, this won't cause any problems as a non-turbo Protege was designed to run the larger 1.1mm (.042") gap. When MSP owners or repair shops buy spark plugs from the parts store, they typically get the wrong gapped plugs and some fail to notice this by assuming they're the correct gap and just install them without giving them a second thought. Spark plug makers actually make spark plugs that are pregapped from the factory to speed up installation and make life easier. Even NGK, the original spark plug supplier for the MSP screwed up their listings! Auto parts stores use the information published by these aftermarket parts makers and therefore when you buy spark plugs from a parts store, you usually get the correct plug but wrong gap! That's right, correct plug, wrong gap. Should any of you be surprised that they screwed up the spark plug gap spec in the shop manual too? Many of you already have been using the plug specs information from the Owner's Manual Addendum which is actually correct despite it being printed months before the shop manual was!ĭue to these discrepancies, it's no surprise that aftermarket parts catalogs everywhere have it all wrong. You really can thank Mazda for this because they screwed up the information in all sorts of MSP related documentation that somehow made it past the editors to the printing presses. Some people got the correct spark plugs, while many others didn't. I decided to post a new thread about the proper MSP spark plugs because there have been many threads about this over the years and there's too much conflicting information.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |