free hit
Temp Gauge - Misc including parts cross references - The Lotus Forums #ForTheOwners Jump to content

Temp Gauge

Recommended Posts

Upgrade today to remove Google ads and support TLF.
  • Replies 9
  • Created
  • Last Reply

Top Posters In This Topic

Thermostat sounds most likely, and easiest / cheapest to check.

I had a faulty temp gauge - reading hot, when the engine wasn't hot at all. You can check the engine with a thermocouple lead to certain multimeters, or with one of those infrared guns at several points to confirm the actual running temp.


Link to post
Share on other sites
  • 2 weeks later...

Before you start taking things apart, make sure your petrol gauge isn't going up at the same time as the water temperature. That would be the sign of a faulty voltage stabiliser. Nearly caused me heart failure when it happened to me because the fuel gauge is hidden by the steering wheel so I didn't notice it moving in sympathy at first.

If the car has been running fine and this suddenly happened, I would definitely check that first (especially as you can do it without opening the engine cover :laughing: ).

S4 Elan, Elan +2S, Federal-spec, World Championship Edition S2 Esprit #42, S1 Elise, Excel SE


Link to post
Share on other sites

Chris, If you intend to exploit the high level of performance the Turbo Esprit produces, I would strongly advise you to at least remove and have the radiator flushed / flow checked to ensure it will supply the level of cooling it was designed too

My 24 year old car (1983 Turbo Esprit with 54,000 kms ) developed a small rad leak when I first got it and I pulled the rad and took it to a rad shop to have it soldered , but was quite shocked to find that when it was flow tested the core was over a third blocked with hard calcium deposits.

It was recored for $200 and the car now runs cool even when its thrashed, so it made sense to me to have it done before it causes any engine damage due to overheating.

Link to post
Share on other sites

Hi chris

Definitely don't run too long if it is reaching 105. the S3 turbo dances with detonation when running perfect, if you run at 105 and run at full boost you will get detonation.

Of course it could be the voltage stabiliser as mentioned or it could be the sender itself. (both of these have caused me problems)

Link to post
Share on other sites
  • 1 month later...

I'm wondering if you have an airlock now after the work you've caried out. Find a steep slope and park the car nose down. Alternatively jack it up at the rear. Idle the engine till the fans come on and then check for water level. If it cools with airflow, and the fans come on OK, then seems to me rad and thermostat are fine.




Link to post
Share on other sites
Guest Troy Halliday

Have you checked to see if the pipes at the rad are getting hot. If you have replaced most of the components and beld/burped the water system. The it could be possible that your water pump is on it's way out.

Link to post
Share on other sites

Do any of you guys know what should the flow rate specification for the turbo? I quess it would be something like liters per minute at a specified pressure.

The other thing I was wondering about, is how many degrees should the water temperature drop, if one measured the inlet and outlet temperature. There must be many varibles, but surely there must be a rought average?

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Upgrade today to remove Google ads and support TLF.

  • Create New...