Vehicle & Technical > Discovery

V8 left hand bank

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disco-v8:
ok i no alot obut the rover V8 now and worship it!!!! i have nearly replace all the internals of it (except pistons, con rods and crank) and havent been running it for that long long realy about 5000 miles.....

well agies ago my viscus packed up and stopped working properly, so me the cheap skate that i am and wanting an instant fix, i put a bolt straight through it, as you can emagine this didnt help MPG and sounded like a jet engine when rev'd, but kept the engine cool......

well after awhile i got fed up with this and have just fitted a par of twin 12" spel fans and after a while the temp stayed fine but there was a slight wiff of a burny smell, but the engine didnt seem to be any hotter than it used to  :? well my engine has always seemed to run hot so i have always thought this was the norm for V8's

well after getting abit worried i noticed that from the front the left hand bank was getting hotter than the right side and that smell could be smelt from that side, so i lashed up a little thermister to the rocker cover and the left side was deffinatly hotter than the rite side, so now im confused????? when the viscuse was on throwing gallons of air a second at the engine it must av kept it cooler...


so does anyone know what the reason could be for this side getting hotter???? oh the slet smell doesnt smell like gasket

ive also just replace the air flow meter, fuel pressure regulator and all the injectors

please can someone help, but i think this one is for the mechanicly minded ones

clbarclay:
You could have something like a blocked/restricted water gallery in the left hand bank. less water flow would mean less cooling.

Alternaively it is possible for one bank to fuel differently than the other bank (one normal an the other rick/lean). I can't remember all the fault diagnosis, but incorrect fueling can cause over heating.

skip:
A faulty oxygen sensor could cause a lean mix on one bank.

 The ecu may not show a fault code as the right criteia have not been met yet, due to the sensor not being bad enough,

Best thing is to compare results from the senors on both banks using a multimeter, unfortunatley I haven't messed about with the 0-5 volt resistive sensors before, but i'd imagine the wiring goes,

2 white wires are for the internal heater,

2 remaining wires are a +5 volt feed and return feed to the ecu.

it's the return to the ecu that needs to be compared,.

doris:
Hi All

I have the EFI test manual (complete test routine with multimeter) if anyones interested?

Damon

Range Rover Blues:
I'd like a copy of that please Doris.


I have a copy of Rovacom which IIRC will tell you the inputs and outputs, ei the timing injector pulse becasue as said, the engine fires in LH and RH banks as well as having LH and RH lambda sensors.

Couple of things to try.

Check the LH and RH lambdas are not swapped over, otherwise the ECU wil be trying to correct a fault that doesn't exist.

Fit the alternative TSR into the ECU loom to dissable the lambdas

Witha the Haynes Manul for RRC you can find out which connector is the Lamda feedback to the ECU and check it at the multiplug connection.

You can clear any ECU faults by disconnecting the battery for a couple of minutes.

BTW, the engine sits closer on the LHS and if ours has the alternator on that side lke mine then it will get significantly less air over that side of the engine.

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