mpescatori

Hello all, I'm looking at a nice (not excessively nice) m.y.1996  Daimler Double Six 6.0.

She comes with the 5-speed auto 'box and already has 213000 Km on her..

As I'd have her more than thoroughly serviced, I was toying with the idea of replacing the 5-speed auto box with the more recent (and better, so they say) 6-speed.

Question: would it be a straight swap, or would there be "compatibility issues" with ECU software, or even bellhousing?

Just a thought...

Hi Paul, I had a SIII Daimler Sovereign with the same XK engine and suffered the same problems.

Possible causes:

1. Water pump not pumping; see if belt slips, check pulley and belt, smears are telltale, eventually a toothed belt will slip a lot less than a smooth belt

2. Water not flowing evenly and freely within the engine block - gunk? deposits over the years? You need to "wash&rinse" the waterways (*)

3. Thermostat not opening properly; replace thermostat

4. Fan turning too slowly or has too few blades (It's warmer these times compared to 50 years ago); try an 8-blade fan from the S3 Sovereigns, and/or a "blowing" electric fan (Kenlowe etc.) on the front side of the radiator (very thin and will not show through the grille)

(*) You can also consider a "waterless" cooland liquid, which will work from -40°C to +140°C; this means no issues with antifreeze in the winter and safe operating temperatures up to and beyond "off the scale" readings of your temp gauge - it's worth considering...

Click here to read about waterless coolant

Cheers,

Maurizio, Rome, Italy

[note: same post as in your earlier thread, but chances are you've abandoned that and concentrating here]

Hi Paul, I had a SIII Daimler Sovereign with the same XK engine and suffered the same problems.

Possible causes:

1. Water pump not pumping; see if belt slips, check pulley and belt, smears are telltale, eventually a toothed belt will slip a lot less than a smooth belt

2. Water not flowing evenly and freely within the engine block - gunk? deposits over the years? You need to "wash&rinse" the waterways (*)

3. Thermostat not opening properly; replace thermostat

4. Fan turning too slowly or has too few blades (It's warmer these times compared to 50 years ago); try an 8-blade fan from the S3 Sovereigns, and/or a "blowing" electric fan (Kenlowe etc.) on the front side of the radiator (very thin and will not show through the grille)

(*) You can also consider a "waterless" cooland liquid, which will work from -40°C to +140°C; this means no issues with antifreeze in the winter and safe operating temperatures up to and beyond "off the scale" readings of your temp gauge - it's worth considering...

Click here to read about waterless coolant

Cheers,

Maurizio, Rome, Italy

Hi, just a thought...

To the best iof your knowledge, is the 6.0 V12 the same origin XK block as the previous 5.3 V12 ?

I ask because the old 5.3 V12s used the old GM 3-spped automatic, and even with limited/no ECU controlò, I wonder if the newer 6:8speed boxes off the 6.0 V12 could be adapted...

Hello, my name is Maurizio Pescatori, I live in Rome, Italy.

I am a retired Colonel, Italian Army.

Back in the day as a dashing Major I was Liaison Officer at HM's Forces, and drove a Daimler Sovereign SIII 4.2

Unfortunately I had to sell her when I left..

Now that I'm retired, I am looking at gettimng myself another...

Best regards,

Maurizio