2013 transit connect overheating

[Johnmango]

Hi hoping someone can help, i have a 2013 transit connect which overheats when going 60mph, i had a egr cooler leak and the oil cooler was blocked.
I have replaced the egr cooler, thermostat, waterpump, heater matrix, oil cooler, radiator, the two return pipes to the coolant bottle, the coolant bottle. flushed multiple times.
I have also done a block test which is clear, not loosing water.
have intermittent heaters, has a air lock as i can hear water shooting into the matrix when i rev it.
i have bled multiple times.
the only thing i can think of is there is a restriction in the water ways in the head.
has anyone had anything similar or have any idea's

Thank you

[metalworker0]

presumably a 1.5 or 1.6

i don't know an awful lot about these motors , since there are not a lot of posts here about them having the overheat problem , me owning the 1.8 myself

but will give you some things to check over


There are infinite causes to this problem.

Will list the main causes minus water pump and thermostat and radiator

1. Head gasket is on its way out
2. Not overheating at all and cylinder head temperature sensor is faulty
3. Expansion tank cap if faulty.
4. Exhaust - dpf /cat blocked

NOTE - i say an air lock in the heater matrix is one of the typical signs of head gasket failure

Well the next checks, would be head gasket checks.

Search ebay with words

"head gasket leak test kit"

More test kits come up with search words"combustion gas test kit" you are looking for a device that looks like a home brew beer trap device. this device holds blue fluid that turns another colour- amber? when combustion gasses bubble through it .

Others ways:
1. Look for bubbling in header tank
2. Buy a coolant system pressure tester...
3. Watch for coolant hoses turning rock hard within minutes of cold starts,
4. Coolant hoses can collapse on cool down.
5. Engine oil can turn milky.
6. Compression tester can show a cylinder is down in compression... means gone between cylinders if two adjacen show low.

All down to experience as head gaskets can fail in many ways and are sometimes tricky to diagnose.
The only certainty is when it fails in a big way .....

Diagnosing a head gasket isn't an exact science --- and once it begins ...... that beginning can last for a long time, often a year. ..and often lead to many confusing thoughts or remedies as you begin to guess.

There are also Chinese water pumps about whose impellers become detached from the shaft.... but that would give the over heating but not the pressure the next day

-----------------------------------------------------------------------------------

and in order to maybe diagnose the DPF ..

if you had forscan ..it may help lead you right to the fault.

Forscan - that's what they recommend here .

NOTE: you can use forscan to get correct fault codes with proper explanation of them - a generic fault code reader may be somewhat misleading, or doesn't work

"Forscan" is FREE software" that you download to a laptop..you buy the interface cable -- this is just the cable, you need a laptop)
You can join the forscan forum ..again free, to get the software and more answers.

https://forscan.org/forum/

Then you come here list the fault codes here ..and we will try to work out the problem.

all the best.mark