Unleaded

[Dutch Paul]

I guess a standard P6 3.5 rover engine can`t be run on unleaded
Right or wrong?

If not is it just a case of changing the valve seats or save the hassle and change for aftermarket heads (bigger valves etc)?

All thoughts appreciated

Just a thought

Paul

[STEVE G]

Paul
Russ will correct me if I'm wrong but I run my 3.5 on unleaded with no problems.i was led to believe the rover heads had hard valve seats from years back.
Steve G
GE427-Rover 281ci.

[Dutch Paul]

Steve

I had a reply from another forum this afternoon that unleaded superplus should be ok

Any ideas?

Just a thought

Paul

[russell_ram]

P6 engine WILL run on unleaded or super unleaded BUT because comp ratio is 10.5 it will need the ignition timing retarding slightly. Valve seats are not the issue here - detonation/pinking is.

Russ

[Dutch Paul]

I see

Thanks Russ

Another quickie - Can the "rope" crank seals on a P6 be upgraded to more modern types?
Is there a kit or something or does it involve machining?

Just a thought

Paul

[russell_ram]

Paul,

No, sorry they can't - or not without re-machining the rear of the block and rear cap. I know it's a bit late now but the P6 block isn't really the best place to start if building a Rover engine. Having said that the rope seal is not really a problem if installed properly - if you can get it not to leak from the start then it shouldn't for 100,00 miles!

Russ

[Dutch Paul]

Thanks again Russ

I`m just doing my homework before I start collecting bits and pieces.Looks like I should be searching for an SD1 rather than P6 engine then.

Just a thought

Paul