Low Water Temperature
Low Water Temperature
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Discussion

Stevie E

Original Poster:

8 posts

207 months

Tuesday 20th October 2009
quotequote all
Hi All!
I'm new to Cerb owning so please help.
It takes about 5 miles to get the temp gauge up to 70 and then it wont record any higher.
Surely it should be running at 90.
Is a low temp as bad as high?
Any suggestions? confused

G20RG B

2,749 posts

261 months

Tuesday 20th October 2009
quotequote all
During the cooler weather it is quiet normall for the engine to struggle to get above 70 deg if you are on motorways ,dual carrigeways etc. Around town it will heat up if you are in traffic to 90 deg when the fans should start to kick in.

I am also new to Cerbs but have owned a Tuscan and today when I was on the motorway I don't think It got much above 70deg although I didn'y keep my eye on it all the time but I keep an eye on temp during warm up routine.

I can't coment wether it is doing any harm but I doubt it.

Better informed than me will be along shortly....

FarmyardPants

4,379 posts

248 months

Tuesday 20th October 2009
quotequote all
The minimum temp is dictated by the thermostat, which should open/close at 82 degC. If it takes a long time to warm up and/or has a steady state temp below that, it could be that your stat is stuck open, or missing.

gruffalo

8,154 posts

256 months

Tuesday 20th October 2009
quotequote all
Mine does the same, on a warm day it sits on the motorway at 80 celcius, 90 in traffic rising to 95 before that fans bring it back down.

Gauges are renouned for being inaccurate, what is the difference in oil pressure at tick over between when it reads 70 and when cold, i.e. is the oil getting hot and the pressure droping a bit at tick over does the mechanical clatter of the cold engine subside?

Gazzab

21,649 posts

312 months

Tuesday 20th October 2009
quotequote all
Let the car idle at stationary and let it run through a cycle or two of fans kicking in. That should prove that all is well and that the low temp is seasonal only??

Stevie E

Original Poster:

8 posts

207 months

Tuesday 20th October 2009
quotequote all
Thanks for a little reassurance.
Oil Temp drops once warmed up and engine doesn't sound as much like a bag of nails.
It sounds like the stat may be sticking open if not reaching aforementioned 82 degrees.
Is this an urgent repair?

Gazzab

21,649 posts

312 months

Tuesday 20th October 2009
quotequote all
Personally I treat all probs as urgent as I dont enjoy driving mine when it isnt all sorted plus if you dont know the cause of the problem then how do you know if delaying fixing is or isnt a risk.... IMHO

gruffalo

8,154 posts

256 months

Tuesday 20th October 2009
quotequote all
Gazzab said:
Personally I treat all probs as urgent as I dont enjoy driving mine when it isnt all sorted plus if you dont know the cause of the problem then how do you know if delaying fixing is or isnt a risk.... IMHO
Worth getting it checked but I would not say it is urgent, just don't spank it till you find out if the temp is realy low or if the guage is wrong.

ridds

8,372 posts

274 months

Wednesday 21st October 2009
quotequote all
FarmyardPants said:
The minimum temp is dictated by the thermostat, which should open/close at 82 degC. If it takes a long time to warm up and/or has a steady state temp below that, it could be that your stat is stuck open, or missing.
yes

Also, get a laptop plugged in and see what the REAL temp is when driving along.

JensenA

5,671 posts

260 months

Wednesday 21st October 2009
quotequote all
As as been said, in cold weather the car's do struggle to get warm. Don;t worry about the 'Bag of nails' engine sound when it's cold, that's the Cerb's sophisticated way of telling you NOT to hammer it until it's warm :-)

First thing I do when I have a new car is to get an oil and filter change done, get that done asap.

For reference here's what my dials read, taken after about 2 hours of motorway driving on a warm sunny Easter weekend - so I guess it's a pretty standard reference to refer to.


al 350i

974 posts

225 months

Thursday 22nd October 2009
quotequote all
link it up to a laptop or desk top computer set up on drive (my laptop hasn't got a serial port) and see what the actual temp is, using the dash gauge is a bit like pinning the tail on a donkey they very rarely give an acruate reading and more like a rough guide, bit like a british weather report laugh

also when you link up to a laptop, check inside the ECU and see if its had a cooling chip fitted quite a common and very good upgrade, this would keep your temp down to about 82-85.

it might be nothing to worry about but i would still investigate the problem just in case!

Edited by al 350i on Thursday 22 October 20:41

davidd

6,713 posts

314 months

Thursday 22nd October 2009
quotequote all
Can I fit a cooling chip to a car that has been set up on a RR ?

FarmyardPants

4,379 posts

248 months

Thursday 22nd October 2009
quotequote all
davidd said:
Can I fit a cooling chip to a car that has been set up on a RR ?
Yes and no. You need to have your chip/map copied and the cooling mod applied (eg by Joo aka spitfire4v8). If you simply fit a cooling chip it will have the standard map so you'll lose the map from the RR.

BLUETHUNDER

7,881 posts

290 months

Thursday 22nd October 2009
quotequote all
JensenA said:
As as been said, in cold weather the car's do struggle to get warm. Don;t worry about the 'Bag of nails' engine sound when it's cold, that's the Cerb's sophisticated way of telling you NOT to hammer it until it's warm :-)

First thing I do when I have a new car is to get an oil and filter change done, get that done asap.

For reference here's what my dials read, taken after about 2 hours of motorway driving on a warm sunny Easter weekend - so I guess it's a pretty standard reference to refer to.

WOW! Never had oil pressure that high.At that rpm and speed mine will be at 50lb. Even when running warm on very hot days it will never drop below 30lb.

Before anyone says rebuild. It has always been given a clean bill of health by every specialist ive taken it to.

tvrgit

8,489 posts

282 months

Thursday 22nd October 2009
quotequote all
BLUETHUNDER said:
JensenA said:
As as been said, in cold weather the car's do struggle to get warm. Don;t worry about the 'Bag of nails' engine sound when it's cold, that's the Cerb's sophisticated way of telling you NOT to hammer it until it's warm :-)

First thing I do when I have a new car is to get an oil and filter change done, get that done asap.

For reference here's what my dials read, taken after about 2 hours of motorway driving on a warm sunny Easter weekend - so I guess it's a pretty standard reference to refer to.

WOW! Never had oil pressure that high.At that rpm and speed mine will be at 50lb. Even when running warm on very hot days it will never drop below 30lb.

Before anyone says rebuild. It has always been given a clean bill of health by every specialist ive taken it to.
Mine looks exactly like that, at that speed - oil pressure and temperature as shown. Maybe 5psi lower on hot days.

al 350i

974 posts

225 months

Thursday 22nd October 2009
quotequote all
BLUETHUNDER said:
JensenA said:
As as been said, in cold weather the car's do struggle to get warm. Don;t worry about the 'Bag of nails' engine sound when it's cold, that's the Cerb's sophisticated way of telling you NOT to hammer it until it's warm :-)

First thing I do when I have a new car is to get an oil and filter change done, get that done asap.

For reference here's what my dials read, taken after about 2 hours of motorway driving on a warm sunny Easter weekend - so I guess it's a pretty standard reference to refer to.

WOW! Never had oil pressure that high.At that rpm and speed mine will be at 50lb. Even when running warm on very hot days it will never drop below 30lb.

Before anyone says rebuild. It has always been given a clean bill of health by every specialist ive taken it to.
try changing the oil pressure spring (very easy to do)

Edited by al 350i on Thursday 22 October 23:48

davidd

6,713 posts

314 months

Friday 23rd October 2009
quotequote all
FarmyardPants said:
davidd said:
Can I fit a cooling chip to a car that has been set up on a RR ?
Yes and no. You need to have your chip/map copied and the cooling mod applied (eg by Joo aka spitfire4v8). If you simply fit a cooling chip it will have the standard map so you'll lose the map from the RR.
Aha, I suspected as much.... Can I get in to the map and change it myself? It must just be a parameter after all.....

D

ro_butler

795 posts

301 months

Friday 23rd October 2009
quotequote all
davidd said:
FarmyardPants said:
davidd said:
Can I fit a cooling chip to a car that has been set up on a RR ?
Yes and no. You need to have your chip/map copied and the cooling mod applied (eg by Joo aka spitfire4v8). If you simply fit a cooling chip it will have the standard map so you'll lose the map from the RR.
Aha, I suspected as much.... Can I get in to the map and change it myself? It must just be a parameter after all.....

D
No. Sadly you have to burn a new eprom. One of the biggest problems with the TVR MBE ECU is the lack of 'accessibility'. MBE have lost the source code for it so nobody can realistically rewrite EasyMap to work with the TVR version. Live mapping the ECU is also awkward.

HarryW

16,029 posts

299 months

Friday 23rd October 2009
quotequote all
Quick sanity check chaps. Is it just me or does your water temp not drop down to near 75-70 when sustained cruising at high speed in the cold, summer yes its around 80-90 and up to 90ish in traffic. The oil temp stays up around the 60-70 mark regardless in the cold once warmed up and 70-80 in the summer confused.

JensenA

5,671 posts

260 months

Friday 23rd October 2009
quotequote all
HarryW said:
Quick sanity check chaps. Is it just me or does your water temp not drop down to near 75-70 when sustained cruising at high speed in the cold, summer yes its around 80-90 and up to 90ish in traffic. The oil temp stays up around the 60-70 mark regardless in the cold once warmed up and 70-80 in the summer confused.
You ain't lost your marbles yet Harry - Mine does exactly the same smile