Stack temperature issue?

[Victor Meldrew]

So the car runs great, Craig has delivered me an amazing starting point to get back into the whole Lotus ownership experience. There are a few minor niggles that we need to sort.

The engine appears to be a good one so far, good compression and it pulls well. I did however have one of the "you have got to be kidding me" moments on the way home from collecting the car. The temp went to 107 degrees.

I pulled over and switched off the fan so I could make a phone call and it miraculously went back to normal.. fan on = 107, fan off = 86. Ah...

So I have a rough understanding that it is most likely something to do with the Stack voltage regulator..

Is this a simple fix or are we talking major Stack surgery with a potential transplant needed?


As a side note, my Stack glass is all marked on the inside with grubby fingerprints that only show at night with the lights on, which leads me to believe that Dan may have had he Stack to bits at some point as it wasn't like that when I handed it in four years ago. That I would have remembered.

[robin]

Hi,

More likely a fault with the earth path. Get two jump leads and attach them end to end (to make one long jump lead). Hook one end up to the negative terminal of the battery (please be careful not to touch the positive terminal!!). Hook the other end up to a good earth on the engine, e.g. the gearbox or something similar. Now repeat your experiment with the blower on/off and see what happens. I suspect you'll find it's not as bad (perhaps still some change, but not as much).

I would be checking the gearbox and front earth straps - in your case I suspect the front strap is more likely to be the issue.

It is, in my opinion, highly unlikely to be the internal voltage regulator in the stack and I would advise against dismantling it until you were totally convinced the fault is in there.

Cheers,
Robin

[Victor Meldrew]

Hi,

More likely a fault with the earth path. Get two jump leads and attach them end to end (to make one long jump lead). Hook one end up to the negative terminal of the battery (please be careful not to touch the positive terminal!!). Hook the other end up to a good earth on the engine, e.g. the gearbox or something similar. Now repeat your experiment with the blower on/off and see what happens. I suspect you'll find it's not as bad (perhaps still some change, but not as much).

I would be checking the gearbox and front earth straps - in your case I suspect the front strap is more likely to be the issue.

It is, in my opinion, highly unlikely to be the internal voltage regulator in the stack and I would advise against dismantling it until you were totally convinced the fault is in there.

Cheers,
Robin

I must admit that I pretty much ignored this issue as I had other things to fix first. It was significantly worse tonight during the drive to Aberdeen. Will need to try the jump lead trick when I get home in two weeks time.

[Stephen]

I have had this and it was the engine earth as Robin says.
Good luck

Stephen