Used engines are also at an absolute premium for these as well - even declared broken engines are still mostly eye-watering due to demand. That's another factor to consider. "I'll just fit a good used engine!"... yeah, maybe.. doubtful. :-)
You've been such a legend helping us get our car roadworthy. Still struggling to get decent MPG so going to test differential pressure, then maybe look at swapping injectors. (Correction values fine, waiting on a tool to test the electronics of 'em!) Also been using your vids to build a list of good values! :')
Excellent video with step by step advice on diagnosis! 😎 I am learning so many horrible things about these engines, I almost want you to stop(!), as a Mazda 6 owner 😂 I found in glovebox a spare OEM cap replacement, so now I have two and this is worrying, but I never experienced any issues typical to hear gasket issues. Right now I am working on a second low oil pressure event in short time, and previously garage did injector washers, strainer, DPF and turbo. I wish everyone, but primarily myself, luck! 😎
This video hits the nail on the head. I bought a second hand cx-5, and when it was delivered, I saw the white residue, but didn't think much of it Turned out that the head gasket was blown. While fixing the gasket, I learned that the exhaust cam needed to be changed, along with my lifters. In the end, I have decided to do a complete engine rebuild based on what I saw. The previous owner really didn't maintain the vehicle well.
Hi, had a 2014 2.2D CX5, FSH, good oil change and flush regime, 120k before developing first low oil pressure fault, luckily before it cost me too much money it was written off by a HGV lorry! Blessing in disguise! Haven't seen any 2018+ registration cars in your videos, did Mazda's2017 updates cure many off the faults? Looking to buy a newer CX5 , 2019 + registration 2.2D.
I’m not sure about this Mazda engine but on many cars failure of the egr cooler can have the same symptoms as head gasket failure. It’s worth temporarily bypassing the cooler lines to the egr to eliminate that.
You are not wrong, however we have tried even changing the EGR cooler and it was producing the same symptoms.(the other EGR cooler could be faulty as well). You can't really bypass the coolant line of it on this engine as it is coming out straight from the cylinder head, but can pressure test the EGR cooler itself.
Great video! I currently have the same issue but can't afford to replace the head gasket at this time. Do you recommend k seal head gasket sealer as a temporary fix?
@@MrNiceGuy94 If you have to choose between two types of coolant, it is not the color that you should notice. It is often irrelevant. On the other hand, it is important what is written in small print on the coolant, i.e. the list of contents. The content of coolants is ethylene glycol based, and the real difference between coolants is the so-called additives added to the fluids. The additives ensure that the coolant is not aggressive towards metals or rubber, or that it breaks down due to the same.
Are these head gasket issues a symptom of not regularly changing your coolant at the correct intervals? As this the known course of head gasket issues on other makes and models with a aluminium block and head and stainless steel gasket being two dissimilar metals contacting each other eventually the aluminium will corrode if the coolant isn't maintained correctly.
Used engines are also at an absolute premium for these as well - even declared broken engines are still mostly eye-watering due to demand. That's another factor to consider. "I'll just fit a good used engine!"... yeah, maybe.. doubtful. :-)
You've been such a legend helping us get our car roadworthy. Still struggling to get decent MPG so going to test differential pressure, then maybe look at swapping injectors. (Correction values fine, waiting on a tool to test the electronics of 'em!)
Also been using your vids to build a list of good values! :')
Excellent video with step by step advice on diagnosis! 😎 I am learning so many horrible things about these engines, I almost want you to stop(!), as a Mazda 6 owner 😂 I found in glovebox a spare OEM cap replacement, so now I have two and this is worrying, but I never experienced any issues typical to hear gasket issues. Right now I am working on a second low oil pressure event in short time, and previously garage did injector washers, strainer, DPF and turbo. I wish everyone, but primarily myself, luck! 😎
This video hits the nail on the head. I bought a second hand cx-5, and when it was delivered, I saw the white residue, but didn't think much of it
Turned out that the head gasket was blown. While fixing the gasket, I learned that the exhaust cam needed to be changed, along with my lifters.
In the end, I have decided to do a complete engine rebuild based on what I saw. The previous owner really didn't maintain the vehicle well.
So you didnt check the car before buying it??
Hi, had a 2014 2.2D CX5, FSH, good oil change and flush regime, 120k before developing first low oil pressure fault, luckily before it cost me too much money it was written off by a HGV lorry! Blessing in disguise! Haven't seen any 2018+ registration cars in your videos, did Mazda's2017 updates cure many off the faults? Looking to buy a newer CX5 , 2019 + registration 2.2D.
I’m not sure about this Mazda engine but on many cars failure of the egr cooler can have the same symptoms as head gasket failure. It’s worth temporarily bypassing the cooler lines to the egr to eliminate that.
You are not wrong, however we have tried even changing the EGR cooler and it was producing the same symptoms.(the other EGR cooler could be faulty as well). You can't really bypass the coolant line of it on this engine as it is coming out straight from the cylinder head, but can pressure test the EGR cooler itself.
Could the water pump failing cause the Reld test to show a yellow colour result when testing the coolant?
Great video! I currently have the same issue but can't afford to replace the head gasket at this time. Do you recommend k seal head gasket sealer as a temporary fix?
Yes, as a temporary solution.
@MrNiceGuy94 thanks for the quick reply. Could it cause blockages in the thermostat and heater core? How long can you expect such a fix to last?
I would say for around a year. It can cause a lot of mess, so I don't recommend it.
The color of the coolant is irrelevant as long as the content is correct
What do you exactly mean by correct content?
@@MrNiceGuy94 If you have to choose between two types of coolant, it is not the color that you should notice. It is often irrelevant. On the other hand, it is important what is written in small print on the coolant, i.e. the list of contents.
The content of coolants is ethylene glycol based, and the real difference between coolants is the so-called additives added to the fluids. The additives ensure that the coolant is not aggressive towards metals or rubber, or that it breaks down due to the same.
Are these head gasket issues a symptom of not regularly changing your coolant at the correct intervals? As this the known course of head gasket issues on other makes and models with a aluminium block and head and stainless steel gasket being two dissimilar metals contacting each other eventually the aluminium will corrode if the coolant isn't maintained correctly.
No, the engines are generally weak
Difficult to tell ,but my guess would be too much heat,as the head gasket fails normally between cyl2 and 3 where the turbo/dpf located
Excellent video, as always