Thread: 4BD1T Running Temperature

G'day All, I don't have any tech/stuff but if you have a std fitted temp instrument like me, mine runs on the 1st white line off cold most days, in extreme temps (outside 40+) it will run on the 2nd white mark and I don't run my A/C either, it will also run up near the 2nd mark when towing a trailer with a Land Rover on it in hilly country, I hope that gives you some idea cheers Dennis

Do you mean max Phyro temp. Pre or post turbo?

Tony

Originally Posted by Rangier Rover

Do you mean max Phyro temp. Pre or post turbo?

Tony

Sorry all - I should have been more precise - water temp not pyro temp

Christopher

The NA 4BD1 definitely benefits from having a thermostat which is correctly operating.

I presume the turbo would as well, in other words they can run too cold, leading to excessive smoke & less power.

Use the Isuzu part and the "o" ring MUST be replaced if the thermostat is to be replaced.

Dave is your man to seek info from on this

regards - Laurie

G'day All I understood that you were asking about H2o temp, mines a N/A 3.9, it has the correct thermostat and it works so you draw your own conclusions cheers Dennis

Thermostat is 82*, I'd be happy with anywhere up to and includeing 92* with general running temp, your not really going to do any harm until 115-120* when it spits the water out and then kills your motor, but you may notice a problem before then

To cold is not good either, so I'd be hopeing to be within^^^^^that range

Thanks for this Rovercare - mine is maxing out at about 94-95* with aircon on big low gear hills, generally runs 82-90* air on on the highway - 82*thermostat fitted. Used to max out at about 90* before I refitted aircon condenser etc. (EGTs maxing at about 540 post turbo)

Christopher

You really do need to have a correctly operating thermostat in an Isuzu. If they are running cool you lose performance and use more fuel. Readily available from Isuzu dealers who are miles cheaper than LR dealers.