Bored out block with reduced wall thickness causes the liners to slip when it cracks. Have never see a 3.5 with slipped liners.

Yes I agree with you :confused::D

But the bad casting was the main one ;)

Look in the V ;)

Some tappet bores have machine marks, some don't o_O

Etc etc ;)
 
I agree, all you have to put up with is..

Cracked heads
Timing chains
Injector(s)
No HP
No Torque
Only 6 cylinders etc

:D
Cracked heads are rarer than liners, timing chains are good for 200K with good servicing, the V8 will have expired at least once by then, although most don't go far as they guzzle too much petrol, injectors are good for very high mileages, HP is perfectly adequate unless you need to show what a big man you are to handle the V8 power, the torque is not ideal but is well masked by the auto box, 6 cylinders is more than enough and the M51 doesn't sound like it has a permanent misfire.
V8's are anti social in modern times with their highly polluting thirst.
 
Cracked heads are rarer than liners, timing chains are good for 200K with good servicing, the V8 will have expired at least once by then, although most don't go far as they guzzle too much petrol, injectors are good for very high mileages, HP is perfectly adequate unless you need to show what a big man you are to handle the V8 power, the torque is not ideal but is well masked by the auto box, 6 cylinders is more than enough and the M51 doesn't sound like it has a permanent misfire.
V8's are anti social in modern times with their highly polluting thirst.

Should of used the 6cyl Vm unit in the P38 ;)

Twas better!! ;)


And Anti social, what a load of twoddle.

My V8 did 18mpg on LPG and Petrol. twice the capacity of your diesel mind you ;)

Compared to the M51 which does 23.
 
Should of used the 6cyl Vm unit in the P38 ;)

Twas better!! ;)


And Anti social, what a load of twoddle.

My V8 did 18mpg on LPG and Petrol. twice the capacity of your diesel mind you ;)

Compared to the M51 which does 23.
Long term average on mine, I log the mileage and brim it every time, is 24mpg, close to 30mpg on a run and that's not the fantasy from the message centre.
I agree the M51 is a poor engine (but robust), only BMW could make a 6 that suffers so much vibration and so little low end torque. The 4 cylinder engine in my Transit is much better. I would agree that the VM in line engine is also better than the M51 but not the V6.
 
Long term average on mine, I log the mileage and brim it every time, is 24mpg, close to 30mpg on a run and that's not the fantasy from the message centre.
I agree the M51 is a poor engine (but robust), only BMW could make a 6 that suffers so much vibration and so little low end torque. The 4 cylinder engine in my Transit is much better. I would agree that the VM in line engine is also better than the M51 but not the V6.

The VM 425 used in the RRC is hard to beat for Low end Grunt.

The VM I6 used in the Grand Cherokee was wonderfully smooth for a derv and had loads of torque.

MPG depends.

My V8 did 18 around the doors and upto 24MPG on a run..

Brim to Brim too.

The dash was a tad optimistic.
 
The Rover v8's casting in some cases was poor.

Which caused the water jackets to be "off centre" the thinner wall cracks when the block is cooked, the block shrinks away from the liner and thats it.

Depends on the engine, luck of the draw in some cases,

Human error as always, some blocks made it through though "coscast" blocks were the pinnacle of Rover V8's..

There was a strong rumour that they received a bad batch of casings but said nothing and carried on. Bit like the RF receiver that was a known problem, only fixed after production stopped. Every car still in warranty should have been retrofitted. With a large discount on price for a new receiver for all the others. Car makers do that and get away with it. Fix for the Triumph 2.5 Pi thrust bearings spinning was a self tapping screw. Badly designed blocks were never changed.
 
The VM 425 used in the RRC is hard to beat for Low end Grunt.

The VM I6 used in the Grand Cherokee was wonderfully smooth for a derv and had loads of torque.

MPG depends.

My V8 did 18 around the doors and upto 24MPG on a run..

Brim to Brim too.

The dash was a tad optimistic.
A version of the VM used in the Chyrsler Voyager suffered cracked heads.
You must have a very special V8 or a lot of the miles were done on the back of a recovery vehicle.
 
A version of the VM used in the Chyrsler Voyager suffered cracked heads.
You must have a very special V8 or a lot of the miles were done on the back of a recovery vehicle.

Yes they chromed the head faces IIRC in latter iterations.

Nope she ran really well, 18mpg - 24Mpg not bad considering my TD5 does 23.
 
A standard 2.5 DSE has more power on paper than the larger, thirstier twin carb 3.5 V8 :rolleyes: without the unreliability issues (so much) ;)

Yes the Turbo intercooled 6 pot diesel has the same power as a carb'd low comp v8 from the 60s ;) :rolleyes:

And even @wammers will agree that the 3.5 was a pretty bombproof unit.. ;)
 
I'm quite fond of my dirty diesel P38... I've had a few V8s in other motors and loved them, driven V8 P38s and they're lovely, but there's something about the reassuring 'chugachugachugachuga' that gives me a warm feeling inside. (Probably caused by the overheating...)

Anyway, head is off and cylinder 6 (rearmost) looks a wee bit cracked:

WP_20191206_20_10_56_Rich.jpg



Yes I could get the AC TIG on it, but it'll probably open up again. I do have a spare head that came with the car, however someone has cross threaded an injector, so that will need repair along with pressure testing.

For comparison's sake, this is how all of the other cylinders look:

WP_20191206_20_11_28_Rich.jpg
 
I'm quite fond of my dirty diesel P38... I've had a few V8s in other motors and loved them, driven V8 P38s and they're lovely, but there's something about the reassuring 'chugachugachugachuga' that gives me a warm feeling inside. (Probably caused by the overheating...)

Anyway, head is off and cylinder 6 (rearmost) looks a wee bit cracked:

View attachment 195654


Yes I could get the AC TIG on it, but it'll probably open up again. I do have a spare head that came with the car, however someone has cross threaded an injector, so that will need repair along with pressure testing.

For comparison's sake, this is how all of the other cylinders look:

View attachment 195655

Yep have scrap head in my garage cracked exactly the same way but on number two cylinder. Changed it for the nephew a few years ago.
 
I'll strip down that head and salvage the cam and valves (all of which are in excellent condition).

Remember I said the car came with a spare head? Cleaned the carbon off it this afternoon and, as Cilla would've said, surprise surprise....

WP_20191207_16_57_24_Rich.jpg


Is it worth knocking the swirl chambers out firstly to see how far the crack extends (purely inquisitive), but also to keep as spares? Do they come out easy with a bit of heat and a drift?

Now to find a good example, third time lucky!
 
I'll strip down that head and salvage the cam and valves (all of which are in excellent condition).

Remember I said the car came with a spare head? Cleaned the carbon off it this afternoon and, as Cilla would've said, surprise surprise....

View attachment 195739

Is it worth knocking the swirl chambers out firstly to see how far the crack extends (purely inquisitive), but also to keep as spares? Do they come out easy with a bit of heat and a drift?

Now to find a good example, third time lucky!

Does it have (or had) a power box fitted?
 

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