Morris 1100 wrote:
Step 1: Fill the tank with unleaded.
Is it just as easy to convert it back to leaded?
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| Converting 850 engine to unleaded https://www.ausmini.com/forums/viewtopic.php?f=2&t=58897 |
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| Author: | tomar [ Thu Nov 19, 2009 7:03 pm ] |
| Post subject: | Converting 850 engine to unleaded |
How ? I am a beginner ! |
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| Author: | Morris 1100 [ Thu Nov 19, 2009 7:06 pm ] |
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Step 1: Fill the tank with unleaded. Step 2: Drive it. |
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| Author: | micowen [ Thu Nov 19, 2009 7:07 pm ] |
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Morris 1100 wrote: Step 1: Fill the tank with unleaded.
Is it just as easy to convert it back to leaded?
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| Author: | Morris 1100 [ Thu Nov 19, 2009 7:09 pm ] |
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micowen wrote: Morris 1100 wrote: Step 1: Fill the tank with unleaded. Is it just as easy to convert it back to leaded? Unfortunately no. You have not been able to buy leaded petrol for over 10 years. |
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| Author: | jimmyinamini [ Thu Nov 19, 2009 7:17 pm ] |
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Morris 1100 wrote: Step 1: Fill the tank with unleaded.
Step 2: Drive it. dont forget the valve saver fluid ,or your car may explode at speeds above 25 |
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| Author: | drmini in aust [ Thu Nov 19, 2009 7:19 pm ] |
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Morris 1100 wrote: Step 1: Fill the tank with unleaded.
Step 2: Drive it. Yeah that'll work, for a while.. then: Step 3: Rebuild the head with unleaded seats once the valves have sunk into the head, or burned out. 850 exhaust valves were not made from the greatest material. 
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| Author: | headgasket [ Thu Nov 19, 2009 7:24 pm ] |
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What are the symptoms of a leaded head experiencing valve seat recession? I have NFI what my engine is but I've been running it on unleaded... 
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| Author: | Morris 1100 [ Thu Nov 19, 2009 7:25 pm ] |
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drmini in aust wrote: Morris 1100 wrote: Step 1: Fill the tank with unleaded. Step 2: Drive it. Yeah that'll work, for a while.. then: Step 3: Rebuild the head with unleaded seats once the valves have sunk into the head, or burned out. 850 exhaust valves were not made from the greatest material. It has worked for my Morris 1100 for the past 7 years. Drive it everyday too. |
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| Author: | Morris 1100 [ Thu Nov 19, 2009 7:28 pm ] |
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headgasket wrote: What are the symptoms of a leaded head experiencing valve seat recession? I have NFI what my engine is but I've been running it on unleaded...
The exhaust valve clearances close up, so the valves eventually don't shut all the way, soon followed by a burnt exhaust valve. So check your valve clearances regularly to see if the exhaust valves are closing up. |
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| Author: | jimmyinamini [ Thu Nov 19, 2009 7:30 pm ] |
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[/quote] It has worked for my Morris 1100 for the past 7 years. Drive it everyday too.[/quote] do you use the valve saver fluid 
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| Author: | drmini in aust [ Thu Nov 19, 2009 7:30 pm ] |
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Morris 1100 wrote: drmini in aust wrote: Morris 1100 wrote: Step 1: Fill the tank with unleaded. Step 2: Drive it. Yeah that'll work, for a while.. then: Step 3: Rebuild the head with unleaded seats once the valves have sunk into the head, or burned out. 850 exhaust valves were not made from the greatest material. It has worked for my Morris 1100 for the past 7 years. Drive it everyday too. Aha yes but the head hasn't been rebuilt in the last 10 years, has it!! I got valve seat recession in a 1098 head in 6 months from rebuild. All it took was use no additive and let my 18 year old son drive it as usual. Note I did this on purpose, to see with my own 2 peepers what happens. 
The hot valves pulled bits of iron out of the head... My 1360 gets Flashlube additive, it works for me. As it did for all those old iron-headed Holden taxis on LPG years ago. |
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| Author: | jimmyinamini [ Thu Nov 19, 2009 7:35 pm ] |
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so tomar looks like you can just add the lube when filling or rebuild your head (your cylender head not your other head ) 
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| Author: | tomar [ Thu Nov 19, 2009 7:38 pm ] |
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so you are saying I need my head looked at! |
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| Author: | Morris 1100 [ Thu Nov 19, 2009 7:44 pm ] |
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tomar wrote: so you are saying I need my head looked at!
Get the head looked at (eventually) All you need to do is get hardened valve seats fitted. |
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| Author: | Phat Kat [ Thu Nov 19, 2009 7:49 pm ] |
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Morris 1100 wrote: tomar wrote: so you are saying I need my head looked at! Get the head looked at (eventually) All you need to do is get hardened valve seats fitted. Yep... and stainless valves (or nimonic) |
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