L322 LPG - known issues?
Discussion
Depends which engine the BMW 4.4 is apparently okay I have owened mine for a year with LPG and the car has been fitted with LPG since it 2005. I have had no problems not sure about the previous owner.
I have read on the Range rover sites that the Jaguar 4.4 engine can be problamatic because the valve seats are not hardened. I have never heard of cracked blocks on these cars.
Do you think he meant the previous incarnation the p38 these were notorious for cracked blocks with or without LPG.
Mick
I have read on the Range rover sites that the Jaguar 4.4 engine can be problamatic because the valve seats are not hardened. I have never heard of cracked blocks on these cars.
Do you think he meant the previous incarnation the p38 these were notorious for cracked blocks with or without LPG.
Mick
Texpis said:
Depends which engine the BMW 4.4 is apparently okay I have owened mine for a year with LPG and the car has been fitted with LPG since it 2005. I have had no problems not sure about the previous owner.
I have read on the Range rover sites that the Jaguar 4.4 engine can be problamatic because the valve seats are not hardened. I have never heard of cracked blocks on these cars.
Do you think he meant the previous incarnation the p38 these were notorious for cracked blocks with or without LPG.
Mick
Yes, he specified the BMW M62 engine - (which is mine) I'm looking into flash lube systems for the LPG. The M62 is a hot running engine, high pressure water systems (ie higher temps) make this more problematic. It seems that the flash lube lowers the combustion temp (LPG burns hotter and dryer than petrol) and protects valve seats. Mind you, it could be snake oil so am looking into it.I have read on the Range rover sites that the Jaguar 4.4 engine can be problamatic because the valve seats are not hardened. I have never heard of cracked blocks on these cars.
Do you think he meant the previous incarnation the p38 these were notorious for cracked blocks with or without LPG.
Mick
http://www.autogassolutions.co.uk/about-lpg/flash-...
I have been known to bang on about the
4.4V8 on Gas
I have had mine for a just under a year now. 12k miles so far.
BRC system with a 100L tank.
I can't fault it (whisper)
I have the gas side serviced twice a year as gas is getting dirtier.
I put a Tank of petrol through every 2/3 thousand miles of gas.
The S/C 4.2 needs flashlube but not the BMW engine. It has hardened valves.
All Range Rover petrols need care on the cooling side.
I have had a few niggles with cooling but with a weekly level check for peace of mind you should be ok.
4.4V8 on Gas
I have had mine for a just under a year now. 12k miles so far.
BRC system with a 100L tank.
I can't fault it (whisper)
I have the gas side serviced twice a year as gas is getting dirtier.
I put a Tank of petrol through every 2/3 thousand miles of gas.
The S/C 4.2 needs flashlube but not the BMW engine. It has hardened valves.
All Range Rover petrols need care on the cooling side.
I have had a few niggles with cooling but with a weekly level check for peace of mind you should be ok.
I have a 4.4 L322 with LPG, and engine issues, however I bought it with problems, and my feeling is that the problems relate to poor maintenance rather than being caused by the LPG.
It has a noisy engine, probably hydraulic lifters, or cam followers. When I purchased it there were problems with the PCV system, and it had blown one of the cam covers off, which I suspect caused oil starvation issues.
Looking into engine rebuilds, there seem to be places which claim to rebuild a lot of M62 L322 engines, and many with LPG, however I wonder how many of the problems are caused by poor maintenance, many people buying L322's with LPG are buying them specifically for the low running cost of LPG, so may skimp on maintenance (though obviously not any petrol/piston - heads!).
All the research I've done seems to indicate that the M62 engine works well with LPG, and of my two local LPG specialists, one runs an L322 4.4, and the other runs an X5 with the m62 engine!
Cheers,
David
It has a noisy engine, probably hydraulic lifters, or cam followers. When I purchased it there were problems with the PCV system, and it had blown one of the cam covers off, which I suspect caused oil starvation issues.
Looking into engine rebuilds, there seem to be places which claim to rebuild a lot of M62 L322 engines, and many with LPG, however I wonder how many of the problems are caused by poor maintenance, many people buying L322's with LPG are buying them specifically for the low running cost of LPG, so may skimp on maintenance (though obviously not any petrol/piston - heads!).
All the research I've done seems to indicate that the M62 engine works well with LPG, and of my two local LPG specialists, one runs an L322 4.4, and the other runs an X5 with the m62 engine!
Cheers,
David
Thanks guys, all very interesting.
I wonder how many of the 'issues with LPG' my indy has seen have other root causes. The rads on the L322's are not great and the M62 does have a reputation for blowing off hoses. With the hotter temps of LPG running I wonder if it's just bringing to light other cooling issues.
I wonder how many of the 'issues with LPG' my indy has seen have other root causes. The rads on the L322's are not great and the M62 does have a reputation for blowing off hoses. With the hotter temps of LPG running I wonder if it's just bringing to light other cooling issues.
Hi Chaps,
Read all the posts here! I am interested in buying the RR 4.4 BMW engine converted already on LPG. All the people I spoke to came out with more or less same issues, one being most common...engine run hot on lpg..meaning issues with valve and valve seats....Only 1 PERSON EXPLAINED that.....you just need to service oil more frequently as it gets thinner runnin on hot temp......which is fine..but overall impression I get is that LPG is not recommended by most people as it does create problems...but some people are very clear that BMW 4.4 ENGINE ON L322 ARE FAR better engines then Jags...I am bit confused what to do? Is it worth buying such an expensive car with status symbol tag.....but poor performance issues....once converted to LPG. Any suggestions as I live in bedford....Appreciate any suggestion/inputs..Thanks
Read all the posts here! I am interested in buying the RR 4.4 BMW engine converted already on LPG. All the people I spoke to came out with more or less same issues, one being most common...engine run hot on lpg..meaning issues with valve and valve seats....Only 1 PERSON EXPLAINED that.....you just need to service oil more frequently as it gets thinner runnin on hot temp......which is fine..but overall impression I get is that LPG is not recommended by most people as it does create problems...but some people are very clear that BMW 4.4 ENGINE ON L322 ARE FAR better engines then Jags...I am bit confused what to do? Is it worth buying such an expensive car with status symbol tag.....but poor performance issues....once converted to LPG. Any suggestions as I live in bedford....Appreciate any suggestion/inputs..Thanks
ABIL said:
BMW 4.4 ENGINE ON L322 ARE FAR better engines then Jags...
I don't know about LPG, but that's rubbish. The Jag engine is smoother, quieter and more powerful. The only discernible difference to me is it doesn't sound quite as nice as the BMW lump. I've had both and I'd take the Jag 4.4 over the BMW every time. Hi Guys...
Do the engine run hotter and blows off hoses as said in one of the posts. What care and precautions one has to take in maintenance...for LPG converted 4.4 Range Rover on BMW ENGINE...? It has new a fairly new system fitted 2 years back....OMVL I guess....any more inputs...appreciated..Thanks
Do the engine run hotter and blows off hoses as said in one of the posts. What care and precautions one has to take in maintenance...for LPG converted 4.4 Range Rover on BMW ENGINE...? It has new a fairly new system fitted 2 years back....OMVL I guess....any more inputs...appreciated..Thanks
ABIL said:
Hi Dingg,
Thanks for the feedback...any recommendations for service near bedfordshire area...Guys if any known garage in this area or nearby for both LPG AND PETROL service then do let me know. Would welcome any more feed back on Range Rover 4.4 LPG converted...thanks
ask hereThanks for the feedback...any recommendations for service near bedfordshire area...Guys if any known garage in this area or nearby for both LPG AND PETROL service then do let me know. Would welcome any more feed back on Range Rover 4.4 LPG converted...thanks
http://lpgforum.co.uk/
The BMW engine (4.4) has been converted very successfully thousands of times. The newer jag engine seems to need a more careful conversion with that mystery thing called flashlube. It seems to be that it is a slightly more fragile engine for LPG but given sensible precautions will run fine.
If it helps I've got a 2003 HSE with the 4.4 BMW v8. It's done 150k with 130k of those with the LPG conversion. The Prins LPG conversion has run faultless - the engines do run hot regardless of the LPG conversion and there's plenty of well documented information out there on the weaknesses of the cooling system. Most of it tends to be down to poor maintenance & using the wrong coolant etc. Look after the coolant system & get the LPG system serviced too & you'll be fine.
The S/C Jag engine isn't as suitable for the conversion even if you use the flashlube. A friends just had to have his rebuilt at 70k with hardened seats despite using a flashlube. If I remember correctly some of the conversion companies are not converting S/C engines unless you get the hardened valve seats done too.
Don't be fooled by people who've done it on a s/c & try & convince you all's well because they've done 10k with no problems as it takes higher mileages for the problem to occur.
Hope it helps.
The S/C Jag engine isn't as suitable for the conversion even if you use the flashlube. A friends just had to have his rebuilt at 70k with hardened seats despite using a flashlube. If I remember correctly some of the conversion companies are not converting S/C engines unless you get the hardened valve seats done too.
Don't be fooled by people who've done it on a s/c & try & convince you all's well because they've done 10k with no problems as it takes higher mileages for the problem to occur.
Hope it helps.
Hi Jammez,
Thanks for your input really appreciate that. I thought so too that due to poor maintenance any car would go faulty. I try to keep things in order to keep the car going and hope to have the same for Range Rover 4.4 LPG converted. I believe that if you look after the car well, by doing regular service they will run forever. Any recommendations for a good garage near Bedford/Watford area for LPG/Petrol engine service.Thanks
Thanks for your input really appreciate that. I thought so too that due to poor maintenance any car would go faulty. I try to keep things in order to keep the car going and hope to have the same for Range Rover 4.4 LPG converted. I believe that if you look after the car well, by doing regular service they will run forever. Any recommendations for a good garage near Bedford/Watford area for LPG/Petrol engine service.Thanks
Hi Jammez,
Thanks for your input really appreciate that. I thought so too that due to poor maintenance any car would go faulty. I try to keep things in order to keep the car going and hope to have the same for Range Rover 4.4 LPG converted. I believe that if you look after the car well, by doing regular service they will run forever. Any recommendations for a good garage near Bedford/Watford area for LPG/Petrol engine service.Thanks
Thanks for your input really appreciate that. I thought so too that due to poor maintenance any car would go faulty. I try to keep things in order to keep the car going and hope to have the same for Range Rover 4.4 LPG converted. I believe that if you look after the car well, by doing regular service they will run forever. Any recommendations for a good garage near Bedford/Watford area for LPG/Petrol engine service.Thanks
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