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If one suspects the leak from the head crack, and the warranty period has passed, especially if one has not been a regular customer for the dealership service...I'd think it would be better to have an independent shop verify the crack. Keep it out of the Mazda computer system. Clean it up, add...

Sparkplugs.com & NGK say the gap is .030" Their price is currently $18.20 each for the NGK 90288 DILKAR7M8

2016 CX-5 vehicles with VINs lower than JM3KE******866136 (produced before September 9, 2016) 2016 CX-9 vehicles with VINs lower than JM3TC******120519 (produced before September 15, 2016 https://static.nhtsa.gov/odi/tsbs/2018/MC-10129575-9999.pdf The rear inner pads may wear very rapidly due...

To be clear, the heaters mentioned are 50 watt, not SAE 50W oil. The added heaters are needed only in frigid conditions. If it's that far below zero also consider an electric battery warmer. The ATF is just slightly higher viscosity than 5W engine oil. The engine oil will warm up easily when...

What is needed to put an electric engine water jacket heater on these cars? That's the right way to pre-warm the engine. The comment above about the timer to save electricity is a very good one. The general rule holds, as soon as the cold car will drive smoothly, drive it easy. That is the...

The gap on modern high tech spark plugs is set at the factory and not intended to be set in the field. On olden days with copper spark plugs, I know, we had to set the gap when we installed them and when we cleaned them.

The naturally aspirated (non-turbo) 2.5 has a good history, and now the 2.5T has been corrected. The brand new 3.3 straight 6....????????

The engine needs to be removed to replace the water pump. (Mazda choosing to buy this Ford engine was not one of their better moves.) The water pump leaks into the engine, coolant mixes with oil, and the engine gets destroyed. If coolant is in your oil now be very careful. An oil analysis...

Do we know if the crack can be internal between an exhaust passage and a coolant passage? That might be; I've only heard of the visible external cracks leaking coolant down the back of the engine. Is this failure in any way mileage related? I know, the more miles the more accumulated stress...

Dusted off old thread.... I've tried many, and my favorite now is 303 Graphene Nano Spray Coating. In all cases the paint needs to be in good condition, so do what's necessary--clay bar or a good polish (which cleans & shines, does not protect) or whatever it needs. The 303 product is the...

A couple of items on this old thread...Mazda chose a Ford engine where a (no-surprise) water pump leak goes into the engine instead of the usual way of leaking out of the pump to the ground. Poor choice by Mazda. Making it worse is the fact that in these cars the engine must be removed from...

Way back there was a question about which brand of oil to use, and the answer is simple. It does not matter. Any top brand is equally excellent. Top conventional oil is very good. Synthetic oil is better at very cold temperatures as it thickens less in the cold, at very high temperatures...

Yes, two parking brake actuator seal kits would be good to have, but $19 each for an o-ring and two small bolts! The o-ring is merely a weather seal, not a pressure seal. Replacement bolts are available in any good hardware store. High strength bolts aren't needed, they bolt down a plastic...

Tip for all brake bleeding...remove the bleed nipple and put a light smear of plumber's thread paste on the threads, then put the bleed nipple back in place. The thread paste will keep the bleeder from rusting in place and it'll seal the threads when you loosen it and vacuum bleed it. Tip for...

Lance, this car which evidently has served you well, is worth about $2k. With everything else worn nearly to the end of its life it is not worth putting another $2k or more into it. Sorry.

There are separate front and rear heater cores. The front one might be plugged. I'd try a strong cooling system cleanser to see if the deposits plugging the core can be cleaned out. The final option is to take the dash apart and put in a new front heater core. CHANGE THE COOLANT MORE OFTEN...

Of course it is lifetime fluid...for the life of the fluid. You didn't think it was for your lifetime??:ROFLMAO:

I'm thinking that while Mazda produces innovative, exciting equipment, I'm not sure it has been adequately tested for the long term. Examples are the version 2 CX9 cylinder head cracks, the brake rear calipers that don't fully release the inner pads after using the parking brake (I'm replacing...

Put in cooling system sealant, refill with green Asian-engine coolant, wash off any dried green stuff on the back side of the engine, and trade it in on your choice of used car on that Mazda dealer's lot.