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LPG is obviously a 'dry' fuel

Engines wear more, run hotter and generally come rebuild time are in a far worse state than those run on petrol ..... worn bores, valve seat recession etc ...... just one other thing to consider

Having said that, plenty of 'independents', mostly related to taxi operations, sell it (at least locally)
with the comparetively low mileage these types of vehicles do wear won't be a problem. i've had similar conversations with classic car owners who want to get hardened valve seats fitted. when unleaded first came to the uk a mate had a 2.8 granada as his daily that he drove like he stole it and after 3 years it burnt a valve. he was doing about 30,000 miles a year so roughly 90,000 miles. how long to do that many miles in a car that's basically your toy? same thing with lpg and wear in my mind.
oh, they are spotlessly clean inside when run on lpg, not the usual carbony gungy buildup inside like when using petrol.
neil.
 

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I've seen severe valve & seat damage in as little as 20k miles

A quick search suggests I'm not the only one

LPG specific engines are built with different valve / seat materials to handle the 'problem'

Regardless, it's a simple cost / benefit calculation ...... but with very low annual mileages ameliorating the upfront costs just becomes less achievable
 

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I've seen severe valve & seat damage in as little as 20k miles

A quick search suggests I'm not the only one

LPG specific engines are built with different valve / seat materials to handle the 'problem'

Regardless, it's a simple cost / benefit calculation ...... but with very low annual mileages ameliorating the upfront costs just becomes less achievable
did you eat a dictionary today? :rolleyes:
 

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I can use smaller words if you're struggling understanding them .......

Didn't come here for an argument, just to pass on some honest information, but I guess you always get this, with the resident 'experts' .......
 

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Discussion Starter · #26 ·
Thanks guys for all your input.
HyTork, the cost/ benefit calculation.
Cost….relatively high but only once.
Benefit……every time I use the truck I’ll get the smug satisfaction that my fuel is less than half the price that everyone else is paying, which makes my F100 quite a economically sensible option as well as great fun to drive.
Engine wear, the drip feed lubricant system hopefully will solve the valve seat wear problem.
Higher combustion temperatures, not sure if that will affect things in terms of engine damage for the limited use that the truck gets.
Ameliorating……I had to look that up. I am just a humble car mechanic…..but it’s a really good word, I’ll try and use it today.
Tinley Tech seems to be the place to go for all the kit.
Under the bonnet, I’ve tried to make everything as neat and uncluttered as I can.
Adding the LPG kit is going to be a challenge to keep it tidy.
 

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The normal suggested way to deal with valve wear etc is to run a tank of petrol through every so often . I'd switch to petrol about every 5th tank of LPG ,30k over 5 years in my Fury, never a problem. On some set ups it won't start on LPG so usual petrol until it's warm and then swap works as well .

What I did with both of mine was fit a seperate petrol pump with a squirter jet . mine was very sophisticated , brake tube squashed around apin and then remove, workd like a screen washer jet .Quick flick from cold while on LPG and instant starting and running.

Fitted all mine myself , dearest kitfor injection was about £800 , carbs came out about £5/600.
 

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Discussion Starter · #28 ·
Kev
What did you do re having your installation inspected and certified for insurance purposes.
If I tell DVSA or DVLA or whatever their name is. Do I risk being called for inspection?
 

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I can use smaller words if you're struggling understanding them .......

Didn't come here for an argument, just to pass on some honest information, but I guess you always get this, with the resident 'experts' .......
no arguement here fella, don't be so sensitive. i just never heard that word before. had to look it up, lol. surely you've been on here long enough now to have thicker skin than that? ;)
good information is always welcome here, as is a bit of banter. not so much the insult at the end maybe, no need for name calling now.......
 

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Bit of banter is good…….we like a bit of banter
agreed, this isn't faceache with all the constant bickering by keyboard warriors. we like banter and not everything said is a dig at someone. (y)
 

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Ronnie , most LPG installers will check and certify a home system. I didn't notify DVLA as didn 't need the tax discount it brings on a later model conversions. I insure them through Classicline who accept it as a mod.
 

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The problem with ANY internet discussion is normally you have no idea who you are talking to or their level of experience or expertise in a particular subject. I was trying to help a bloke on a facebook group who decided to tear into me for offering up a couple of names for suppliers who could help him.

H etook exception because he's be doing this for 50 years orwhatever .." don't you think I've already tried them ? " . Well actually I have no idea who you are same as he had no idea of why I knew of these specialist suppliers having used them as suppliers to my old firm for years .

If you think someone is having a pop , explain yourself and ask them !

After being on here regularly for over 10 years I know many many of the regular posters and their backgrounds.
 

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Discussion Starter · #34 ·
maybe we should talk about our backgrounds

My background.
Old car mechanic, been running my own one man repair shop since 1978.
Now semi retired working 3 days a week.
Owned and operated a fixed wing aircraft and Gyrocopters 1984 till 2017.
Aircraft inspector for gyros until recently.
Had quite a lot of classic cars.
Now into hovercraft, camper and my good old F 100, which is a delight.
 

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Re LPG, fitted a xlr8 system to my v6 3.0 jag and ran it for 90,000 without a problem, the beauty of the xlr8 was it ran 5% petrol all the time. No additional lubricant.
 

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i used my 2003 chevy silverado as a daily work truck for 10 years doing between 600 and 1000 miles a week with a bed full of tools etc weighing close to a tonne and run it on gas everyday. Yes it did erode the valve seats, 3 sets of heads in the 10 years, but it was 80 - 100'000 miles between each set. I did the head swaps myself and it cost less than £1000 each time. The oil was always a red colour when I changed the oil almost like trans fluid but it went in yellow when changed!!. When I first had mine converted to gas it was 30p a litre and I was getting the equivalent of 45 mpg cost wise compared to petrol. I worked out that I was saving £8000 per year on fuel costs. I dont use it as a daily now owing to the fact that it has done in excess of 300'000 miles and i need it to tow my race car so retired it from work duties.
I would never say that gas ruins engines but its definitely different to petrol.
 

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maybe we should talk about our backgrounds

My background.
Old car mechanic, been running my own one man repair shop since 1978.
Now semi retired working 3 days a week.
Owned and operated a fixed wing aircraft and Gyrocopters 1984 till 2017.
Aircraft inspector for gyros until recently.
Had quite a lot of classic cars.
Now into hovercraft, camper and my good old F 100, which is a delight.

My background ... knew sweet Fa and still learning
 
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