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post #1 of 7 (permalink) Old 05-17-2019, 06:23 PM Thread Starter
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Iso-Octane

MB Maintenance Manual 14-450 (page 2) recommends the use of Iso-Octane to test for leaks of fuel lines, intake system, fuel distributor, and injection valves. I am unable to find that product available for my use.

Where can I obtain Iso-Octane?
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post #2 of 7 (permalink) Old 05-17-2019, 07:21 PM
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Iso-Octane

Look for 2,2,4-Trimethylpentane:

https://www.fishersci.com/us/en/prod...isooctane.html

I looked at the 99% one it’s quite expensive, $50.70 for 500 mL.
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post #3 of 7 (permalink) Old 05-17-2019, 07:23 PM
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But I never bought any for such purpose. (Just wanted to help you source it).
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post #4 of 7 (permalink) Old 05-18-2019, 04:38 AM Thread Starter
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The associated Safety Statements make me wonder if I should pursue this product:

Safety and Handling
GHS H Statement:
May be fatal if swallowed and enters airways.
Very toxic to aquatic life with long lasting effects.
May cause drowsiness or dizziness.
Causes skin irritation.
Highly flammable liquid and vapor.

GHS P Statement:
Avoid breathing dust/fume/gas/mist/vapors/spray.
IF SWALLOWED: Immediately call a POISON CENTRE or doctor/physician.
Do NOT induce vomiting.
Avoid release to the environment.
IF ON SKIN: Wash with plenty of soap and water.
Keep away from heat/sparks/open flames/hot surfaces. - No smoking.
Ground/Bond container and receiving equipment.

WARNING: The information provided on this web site was developed in compliance with European Union (EU) regulations and is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling and use. It is not to be considered as either a warranty or quality specification.

GHS Signal Word: Danger [Will Robinson]
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post #5 of 7 (permalink) Old 05-18-2019, 05:04 AM
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Quote:
Originally Posted by Tom Kaiser View Post
MB Maintenance Manual 14-450 (page 2) recommends the use of Iso-Octane to test for leaks of fuel lines, intake system, fuel distributor, and injection valves.
Not fuel lines (that's a separate sentence.). It's just a check for vacuum leaks. You can use carb cleaner, propane, anything moderately flammable will work.

John
"Real engines don't have spark plugs!"
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post #6 of 7 (permalink) Old 05-18-2019, 06:52 AM
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There is another chemical in automotive grade fuel that is/was a known carcinogen at the time of publication, I believe benzene. (Should be in the same text as you saw the iso-octane). It is given as the reason not to use plain old gasoline.

I noticed that 2,2,4-Trimethylhexane is used as a pesticide, which means somehow when it’s done killing pests may be somewhat safer....
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post #7 of 7 (permalink) Old 05-18-2019, 08:01 AM
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By definition, i-octane has a Research Octane Number (RON) of 100 (n-heptane is 0). But I cannot see why gasoline would not be ok for the purpose.

Last edited by nugent; 05-18-2019 at 08:08 AM.
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