1975 2F Smoke

[stclair]

Did a quick search, but thought this is worth an ask. Hoping to gather a list of things I can check. Oil level is good. No signs of coolant in it either.

I've been driving my '75 regularly, and it's been running pretty darn well. Recently had exhaust replaced, so it even sounds good. Driving home today, started smelling more exhaust than usual. Anyway... parked it, let it run, and definitely getting moderate smoke from tail pipe. Doesn't look like coolant type smoke (I have changed out most of the cooling system). I am a part remove/part replace level repair guy. If I can pinpoint/identify the problem I might actually be able to fix it myself. Any idea of where I should start? My search here suggests a valve adjustment....maybe. Sound right? Never done that before, but happy to give it a try if so.

Thanks for any helpful suggestions!

 

[ceylonfj40nut]

Valve adjustment first. Evaluate. Then compression check. Use google feature to search mud for valve adjustment.

 

[Pighead]

What color is the smoke and when does it happen?
A valve adjustment is always a good start and every LandCruiser owner should know how to do one.

 

[stclair]

What color is the smoke and when does it happen?
A valve adjustment is always a good start and every LandCruiser owner should know how to do one.

Thanks....I haven't done one before, so look forward to learning something new. Hard to say what color it was...definitely not white (like coolant). Just noticed it as I was driving. It might be running a little rough now...hard to say.

 

[stclair]

Valve adjustment first. Evaluate. Then compression check. Use google feature to search mud for valve adjustment.

Thanks...I will search for a step by step. New fix for me.

 

[Pighead]

Could just be running a little rich, time for a good tune-up. Which always starts with a valve adjustment...

 

[stclair]

Could just be running a little rich, time for a good tune-up. Which always starts with a valve adjustment...

Thanks! Gathered everything for a tune up a while back, just haven't had time to do it. I'll add valve adjustment to the list.

 

[pb4ugo]

Blue smoke is oil, black smoke is fuel and a rich condition. Look closely at the condition of the plugs. You can find charts and pics on how to read them. Suddenly running ruff could be from running rich, fowling the plugs, and could be an issue with the carb. Base lining the engine with a valve adjustment and tune up is a good place to start.

 

[pjohnson]

Hold a white rag over the exhaust for a minute while running. Give a sniff and that will tell you where to start looking. Fuel, oil and coolant/water all smell different. You can also see the color of the residue on the rag.

 

[stclair]

Hold a white rag over the exhaust for a minute while running. Give a sniff and that will tell you where to start looking. Fuel, oil and coolant/water all smell different. You can also see the color of the residue on the rag.

Thanks! Never thought of that trick. I was just looking at the smoke thinking hmm yep, looks like smoke. I’ll give that a try so that I can narrow it down.

 

[stclair]

And just like that….no smoke. I didn’t fix a thing, just didn’t drive it for a day. Maybe she was just tired. I will still follow the above advice and plan to adjust valves. Thanks all!!

 

[Paul_A]

Rust preservative in the pipes. Stinks like oil because it is.