BJ70 blue smoke!!!

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NV BJ70

NV BJ70

10 Year 15 Year
Joined
Jun 28, 2010
Threads
5
Messages
42
Location
North Vancouver, British Columbia, Canada
Hi all

so recently (... the last couple months) the 3B has begun blowing blue smoke!
Annnnd I have no idea why.
My dad says it's burning engine oil... :S

I just went to AirCare and it passed perfectly fine (10-point something out of the max 30), but if the police catch me with all this smoke, I'm kinda screwed and will have to get an inspection and such and such and such and it'll be a hassle

The thing is that it doesn't blow the smoke constantly...
At startup and cold driving, there is a huge issue with the smoke, but it's way less when the engine is hot. At other times there's absolutely no smoke at all (but those instances are getting scarce).

so i'm wondering if any of you have an explanation and maybe a solution (aside from having to rebuild the engine, hopefully) Thanks :)
 
Does ur engine oil level decrease more than usual?
 
How many klms has it done? Sometimes a thicker oil can help.
Ther reason it blows more smoke than other times is that expansion around the piston and rings help take up the slack,but as you have correctly noticed,its getting worse because the wear is becoming too much
 
Fix your oil level first.

Another cause of smoking in the inline pump equipped 3B is the injection pump diaphragm.

Valve guide seals are not that common an item but can and do go. They can be fixed with the engine in place using a few special tools.

~John
 
NV BJ70,I notice you also have another post with no heat from the heater,if as you say the truck takes over 45 minutes to even start producing heat you are not getting the motor up to operating temp. and not burning fuel properly,washing the cylinders.Smell the oil,if it reaks of diesel it is most likely diluted with fuel,install a new thermostat and change the engine oil.Burning blue/white can also be a result of a engine running cold.
 
I've not done much yet even though it's been awhile :/

Anyways first thing first, I drained almost 2.5 litres of engine oil and we smelled it but no diesel smell at all.

The more we look at the smoke, the more it looks white with a slight bluish tint. And it doesnt happen constantly...
We tried to use an open plastic bag to capture the exhaust to see if it would condensate (to see if it was steam) but the smoke remained inside without condensing even though we closed up the bag. We opened the bag an the smoke just rose up again

The smoke kind of looks steam-ish, doesn't dissipate (creates a HUGE fog behind the truck) and doesn't have any different smell other than usual diesel engine exhaust smell.

Just recently I discovered that if I run the engine at ~1100 RPM for about 5 mins the smoke all goes away in the back and sometime it still comes out of that small pipe leading out downwards from the engine. But the smoke is mainly cleared out

And then a few other things get weirder and weirder because suddenly all three indicator lights for 4WD, Parking Brake, and Battery stopped working... I checked every fuse and theyre all fine... it would be quite extraordinary if all three bulbs burned out at once. Probably it is another grounding (earthing) problem, eh?
 
NV BJ70 is the smoke real nasty,like burns your eyes and throat? Have you checked whether your EDIC lets the pump come off over-injest mode when it starts up?
Our truck at work (mercedes OM 352 motor) also smokes badly om cold start,its a whitish smoke with just a hint of blue and it burns your eyes and throat almost instantly. its caused by the over-inject(aka cold start) on the fuel injection pump.
 
blueBJ70 said:
NV BJ70 is the smoke real nasty,like burns your eyes and throat? Have you checked whether your EDIC lets the pump come off over-injest mode when it starts up?
Our truck at work (mercedes OM 352 motor) also smokes badly om cold start,its a whitish smoke with just a hint of blue and it burns your eyes and throat almost instantly. its caused by the over-inject(aka cold start) on the fuel injection pump.
Click to expand...

Nope the smoke doesnt do anything to interfere with my eyes and throat...

I have no idea how to check if the EDIC is doing its job properly...

The smoke is worse on cooler days than warm days. One time, one of my neighbours from half a block away ran over here to see what was happening because he thought a house was on fire :P
 
NV BJ70 said:
Nope the smoke doesnt do anything to interfere with my eyes and throat...

I have no idea how to check if the EDIC is doing its job properly...

The smoke is worse on cooler days than warm days. One time, one of my neighbours from half a block away ran over here to see what was happening because he thought a house was on fire :P
Click to expand...

That gives us a great visual on how much smoke:)

Is is like this? Cold start of my 3B. Rebuilt injectors, so I know they were good. This is all fuel if you're EDIC is acting up, it would keep smoking like this is on startup

http://sp430.photobucket.com/user/a550550/media/BJ70/MOV00824.mp4.html
 
Last edited:
I'll say it again: check the injection pump diaphragm.

Easy to do, common cause of smoking on 3Bs with diaphragm controlled inline pumps.

Also, if your engine is not getting up to temperature, that's a really important thing to sort out.


~John
 
Thanks John @ Radd Cruisers for the pointer on the diaphragm
I did a bit of a search on the Diesel forum and tested the diaphragm by sucking on the tube and it is definitely losing suction very quickly, so i'll be ordering a new one tmrw
 
Fixed!



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yesterday i took the longest time taking the EDIC Motor out. The bolts came out fine but the motor was stuck to the mount :P wiggled and jiggled it and it finally came out.



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Then I took off the diaphragm housing cover
It was pretty easy. The screws didn't seem very tight though.



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Then I took off the cotter pin and washer and slid the diaphragm off. Couldnt see anything wrong with it



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I just wonder... would this be an original diaphragm? Because it has "ND" stamped on it
Do the new Denso stuff still have ND stamped on them?


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I actually hadn't gotten any replacement diaphragm yet, so we made a trip to Lordco and the guy at the counter said there wasnt any rips he could see. Asked for Neatsfoot Oil but they dont have any
So we went to the shoe repair shop in the mall and bought a big bottle of it



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I took the oil and gave the diaphragm a few drips on both sides and rubbed it in and then stuck it back into the housing
IT TOOK SO LONG. The hole has to be so well aligned fr it to slip on.

finally finished at 9PM


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I also re-tested it by sucking on the tube and it has perfect vacuum.... maybe it was my jig that i set up last time that was leaking air.... oh well



And this morning I started it up and ran it for around half an hour with regular idle speed (600 to 750) and voila NO SMOKE


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Now it's time to wash the truck ...

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image-407640463.webp


image-801910064.webp
 
If you need these diaphragms, we have lots of them in stock.

How's the smoking issue?

~John
 
Any local suppliers? Yes radd cruisers on the island,ebi in coq.and ateb in burnaby,any one of those guys are highly recommended by any coastal cruiser guy,heck just call and chances are they'll talk you through it so you can at least get to them.guess you found out about one of them already,nice cheap fix too.
 
Thanks John and wrongway around for informing me of your most valuable sources!

We seem to have a problem now again...

So first, we took it out for an actual first drive onto the highway. Up to 40 km/h it seemed ok then on the acceleration lane a huge cloud of blue smoke puffed out for about ten to fifteen seconds, then it was okay again.

Afterwards on our way back the engine started to overheat... so we stopped and cooled it down for a bit and then cautiously drove home.

The handbrake was kind of stuck too, so i took some WD-40 and sprayed it and used a hammer to tap it open again. (temporary fix)

For the rest of the night and evening the truck drove well, no smoke, no overheating. Rarely went over 2000 RPM.

Then just after midnight, I was driving a friend home. The drive was fine but i encountered quite a steep hill before his home. I was going around 2200 RPM most of the way up (it was five blocks)
And when I got to his place it was still fine.

Then after I left, I stopped at a traffic light and I look in the mirror and oh no i see puffs of white coming out of the tailpipe. Idling at ~750 and it's just puffing out. I start driving again, and the smoke just goes away. But when I got to another traffic light and stopped, it started puffing out again...

Most of the rest of the drive home had no stops at the lights but when i was a couple blocks from home, (thank goodness the rest of the way was down slope) the truck started overheating again. When I turned on the heat blower, it was instantly hot.

I park, (with the smoke starting to billow out again) shut off the engine, and open the hood and i can hear it go blup blup blup blup blup. The radiator hose is just super hot.

Help!
 
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