OK to mix spark plug types?
- Thread starter pbm
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I would run the same type, I do not really know but resistance difference may do something.
You would have harmonic issue at best and uneven wear at worst. I would not do it.
I'd put the double plats in all the holes.
But no harm will come with mixed plugs, if the heat ranges are correct.
But no harm will come with mixed plugs, if the heat ranges are correct.
Having the same type of spark plugs in a waste spark ignition system may be critical, but I don't know for sure.
carlprop may have about the only negative that there is.
Any multi cylinder engine is really a cojoining of a number of single cylinder engines. Each suffers a different inlet and exhaust conditions (depending on what happens immediately before each of those events for that cylinder), and each has different coolant flows and temperatures.
Any multi cylinder engine is really a cojoining of a number of single cylinder engines. Each suffers a different inlet and exhaust conditions (depending on what happens immediately before each of those events for that cylinder), and each has different coolant flows and temperatures.
Toyota products typically specify one NGK part number and one Denso part number, and apparently they both function the same way.
Most GM vehicles state to use ACDelco plugs, but in some cases, once you open the package you'll see NGK written on the side of the plugs.
Most GM vehicles state to use ACDelco plugs, but in some cases, once you open the package you'll see NGK written on the side of the plugs.
I wouldn't mix types. Use all the same kind. Esp if your paying for Iridium plugs. NGK I assume?
In the 05 to present 4.0 V-6 for the Tacoma, one bank has NGK's, and the other bank ND's. Both are the same type of plug, however.
One of the forum members over at http://www.speedtalk.com works at a place that uses pressure sensors to measure what's happening inside combustion chambers during operation. There is an amazingly wide spread of the dynamics both within a cylinder and between cylinders even on an engine that is apparently operating at a steady-state load and appears to be running quite smoothly.
So long as the spark plug is a type that is specified for the engine in question it is highly doubtful that anyone could notice a difference with various brands/types. Perhaps the dynamic sensors would notice a difference but human perception probably couldn't pick it up.
Joe
So long as the spark plug is a type that is specified for the engine in question it is highly doubtful that anyone could notice a difference with various brands/types. Perhaps the dynamic sensors would notice a difference but human perception probably couldn't pick it up.
Joe
Double plats will always work in waste fire ignition systems.
Stock, the factories often use a double plat on one leg, and a single plat on the other leg.
Because of the +to- and - to + firing, erosion is on the center or side electrode.
Cheapness lets them put in a single plat plug . If you replace with singles, you have to put them in the right hole.
Most replacement plugs will simply just use the double plat, anyway.
Stock, the factories often use a double plat on one leg, and a single plat on the other leg.
Because of the +to- and - to + firing, erosion is on the center or side electrode.
Cheapness lets them put in a single plat plug . If you replace with singles, you have to put them in the right hole.
Most replacement plugs will simply just use the double plat, anyway.
Look at the 3.4L toyota V6's. 3 ngk's and 3 denso's straight from the factory. Their concern is one side of the engine getting hotter.
Just remember plugs love to sieze if they are left in there long enough. Follow the manufacturers intervals but even that is sometimes too long IMO.
Just remember plugs love to sieze if they are left in there long enough. Follow the manufacturers intervals but even that is sometimes too long IMO.
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