Overheating Mpi Logic
#1
Posted 26 April 2017 - 08:20 PM
Symptoms as follows
- heater not getting hot
- steam blowing from expansion tank after very short time
- temp gauge never above half way
- no visual sign of oil/water contamination
- fan cuts in, but sometimes only after it has been stood with the engine off for a while.
A new pump was fitted about 9 months ago and did a couple of hundred miles afterwards with no issues. Car not used much since.
Any bright ideas guys ?
#2
Posted 26 April 2017 - 08:24 PM
#3
Posted 26 April 2017 - 08:25 PM
could be a couple of things ...
IIRC the expansion cap can be faulty , look to see what condition it is in
could be a silted up water jacket , rad or heater - what antifreeze are you using & how old ?
hose collapsed / air lock - feel where the pipes go from hot to cold check for condition
thermostat stuck close / failed / wrong one
could be impeller on water pump broke off (sometimes happens , even to newer ones)
head gasket blowing from cyl to water jacket (you can buy a sniffer kit to look for combustion gasses in coolant)
timing / mix out of tune
brakes sticking
check the cheapest / free things first
Edited by sledgehammer, 26 April 2017 - 08:35 PM.
#4
Posted 26 April 2017 - 08:42 PM
from the mpi expert, the pipes to the heater go solid with rust and i mean solid like poo, then they overheat, this is because people dont use the correct antifreeze and the car is now old!!!!!. normally a new heater matrix, radiator and the pipes cleaned solve this, as this stuff blocks then up too also check the rad fan is working right way had a few wired wrong at the factory.
#5
Posted 27 April 2017 - 06:01 AM
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