Coolant alarm/ temp gauge rising

[mikeonb4c]

Please help, my bongo is at the garage and has had some bits done, new glow plugs, exhaust gasket. After i collected it, the coolant alarm keeps beeping and the temp gauge is reading high despite the car not overheating. The current garage do not know what prob is and have taken it to another nearby garage who are stuck too. Its really frustrating bevause otherwise the bongo works amazing!

Many thanks, Jonny

calm down calm down. .

ask the garage that changed the glow plugs to carefully check the work done, if your bongo had long plugs fitted originally and they replaced them with the more easily available shorter ones then there is a chance that the bar connecting the top of the plugs is shorting out on the injector pipe returns, these are metal and could be causing an electrical short giving weird results. the metal connecting strip on the plug top is plastic coated but burns/wears through if its too near the injector pipes, simply bend the connector away.

the bongo temp gauge is nearby so stray voltage may be being picked up through the sensor earth.

.

You read my thoughts NB

[Northern Bongolow]

heres some more wacky thoughts then, .

if the gasket that was changed on the exhaust was the head to manifold gasket then hot gasses leaking at the number 1 stud could have damaged the alternator diodes, this has cooked the alternator as it vents/cools at the back, this voltage fluctuation/fault is being picked up on the low coolant alarm and they can be quite voltage sensitive.
the wire for the normal bongo temp sensor goes from the harness at the side of the alternator then goes over the front of the rocker cover to the sensor, this is again in the same area so could have been heat damaged, or the wire pulled breaking the top of the temp sensor itself, check it to see if the sensor top is wobbly and loose at the top. or again the sensor supply voltage is being affected by the dicky alternator.

first step is check the voltage of the alternator when ticking over after starting it up, then check again when revving then again when lots of accessories are put on, you may find its kaput.

wacky enough for you mike??????

[Jonny Tunnel]

Thank you both, i shall speak to the garage tomorrow.

Regards Jonny

[mikeonb4c]

heres some more wacky thoughts then, .

if the gasket that was changed on the exhaust was the head to manifold gasket then hot gasses leaking at the number 1 stud could have damaged the alternator diodes, this has cooked the alternator as it vents/cools at the back, this voltage fluctuation/fault is being picked up on the low coolant alarm and they can be quite voltage sensitive.
the wire for the normal bongo temp sensor goes from the harness at the side of the alternator then goes over the front of the rocker cover to the sensor, this is again in the same area so could have been heat damaged, or the wire pulled breaking the top of the temp sensor itself, check it to see if the sensor top is wobbly and loose at the top. or again the sensor supply voltage is being affected by the dicky alternator.

first step is check the voltage of the alternator when ticking over after starting it up, then check again when revving then again when lots of accessories are put on, you may find its kaput.

wacky enough for you mike??????

Oooooooh yes, you can definitely come and play at the foot of our street young Ady

[Jonny Tunnel]

BAD NEWS, HEAD GASKET HAS GONE, NEED A NEW ENGINE!

[haydn callow]

Steady now.....it is probably the cylinder head if anything that is cracked......this ca be replaced for about £1200.....,engine should be fine.....
If all was well when it went into the garage, I would be asking questions.
Have you had it looked at by a Bongo savvy garage yet? If not, get it to one ASAP or call the mobile mechanic.
Good luck