P38 Diesel. What engine temperature is normal?

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Larsern

Member
Posts
53
Location
Trondheim, Norway
Some thoughts for the weekend.

Having just changed the head gasket due to overheating / loosing water ... (another tread, all fixed now)
Being afraid of overheating again, I started running the engine with the Nanocom hooked up showing engine temperatures. The needle is dead in the middle at all time.

This is the temperatures I get:
Normal city or highway driving flat or moderate hilly: 92 - 96 C.
Hilly but not long steep driving: 95 - 99 C
Steep gradients (5%-8%) 102 - 105 C (once up to 106 C)
Downhill no pedal: 82 - 83 C

Would be funny to hear what temp range you get for the various driving.

Have a nice weekend.

L
 
New termostat, waterpump, radiator,(2), expansion tank cap, coolant,....

Just would be very interesting to learn about other's temp observations using Nanocom.

Helping to calm my nerves that are a bit fringy after all the troble I had before changing the head gasket
 
Update: Have made a static adjustment of the FIP. It was on 0.80 mm instead of 0.90mm. After this the engine temp went down by 3-4 degrees in all conditions.
0.80 instead of 0.90 what does that mean, was the injection retarded or forwarded? If it was retarded I should suspect this meant a surplus of fuel for each injection and this could give higher temp.
Any thoughts?
 
Larsern said:
Update: Have made a static adjustment of the FIP. It was on 0.80 mm instead of 0.90mm. After this the engine temp went down by 3-4 degrees in all conditions.
0.80 instead of 0.90 what does that mean, was the injection retarded or forwarded? If it was retarded I should suspect this meant a surplus of fuel for each injection and this could give higher temp.
Any thoughts?
Click to expand...

Good thought!

My needle always sits at 12 but I've seen some interesting temperatures on the Nanocom. Think I might have some traces on my laptop. Will have a look later.
 
All day running regardless of the weather at twelve position. One occasion in Italy fully loaded with family and luggage up steep mountain road!! Damn nearly all the way up..stopped and turned around:confused::oops:
 
myfirstl322 said:
Hey, what do I know, I don't kneel at the DERV font, but I've got an inkling Turbocharging negates it to a large extent.
Click to expand...

The .90 mm setting mentioned is the static pump timing at TDC. It has nothing to do with how much fuel is injected. The .90 mm is where the timing device reverts to under spring pressure when engine is stopped and fuel pressure reduces internally in the injection pump. It gives a slightly advanced setting ready for the next start. When the engine starts the number four injector measures the actual point of injection, the ECU receives this signal and compares it to the TDC reading from the CPS. The ECU then modulates the timing device solenoid to increase or decrease internal fuel pressure against the spring loaded timing device to turn it as required to set the point of injection at 1 or 2 degrees BTDC. The only thing that will be apparent if the static timing is set at .80 mm at TDC, is that the modulation will be at the higher side of the acceptable normal, which should be between 45% and 55% engine warm and at idle. If the static timing is set retarded, the modulation will be higher than normal and if the static timing is advanced the modulation will be lower than normal. None of that effects the amount of fuel injected. And neither should it cause any running temp change.
 
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