4.0L Rover V8 Valvetrain Carbon Buildup

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Originally Posted by ozscott

Rick the beauty of the LR unless motors was hardened seats. My d2 4.0 at 200k did a head gasket after I overheated it twice and zero seat regression and very clean motor after 100k of LPG use. Cheers

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Slightly off topic, but did ALL rover v8s have hardened valve seats? If so, running an upper cylinder lubricant is not necessary? Does this extend to the p76 v8 as well?
Cheers,
Chris

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Originally Posted by cjc_td5

Slightly off topic, but did ALL rover v8s have hardened valve seats? If so, running an upper cylinder lubricant is not necessary? Does this extend to the p76 v8 as well?
Cheers,
Chris

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I'm guessing so seeing as they are aluminum heads?

Happy to be corrected of it aint so.

Mate I have a feeling it's the unlead motors only ...but not sure where that fact lodged into my mind from..

Cheers

Quote:

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Originally Posted by cjc_td5

Slightly off topic, but did ALL rover v8s have hardened valve seats? If so, running an upper cylinder lubricant is not necessary? Does this extend to the p76 v8 as well?
Cheers,
Chris

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I've only seen one P76 burn a valve on LPG and that was a 600K old car in terrible condition, it actually suffered from too much oil caking up the valves. My wife's old P76 did 420K on one engine and the valves showed very little wear without any added upper cylinder lube. The valves were clearly marked "Rover" so I expect the hardened seats were too.

Nice mate. The Rover V8 seems to run LPG well. Wonder how many kilometres on Pedro's LPG 4.6 now? Cheers

I've owned two V8 Land Rovers and my engines never looked like that, they were surprisingly clean, I used Penrite oils.

An educated guess?
maybe 25K? though most of that would have been on stuck O2's [bigwhistle]
It is running perfectly ATM,,, [bighmmm][bighmmm][bighmmm][biggrin]
goes very well on LPG.