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  #1  
Old June 28th, 2014, 02:27 PM
richord
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Richard Ordowich
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White Smoke Cloud

My truck has been sitting for a couple of weeks. Today I changed the rear shocks and started it just to test it out.

I heard a loud clank noise from the engine when I started it and lots of white smoke. I usually have a bit of white smoke when it first starts but this was a cloud. I stopped the engine, waited a few minutes and it started fine, no clank but now puffs lots of white smoke.

The only other weird thing is that as I was working on the truck I could hear a noise from the fuel tank like vapor escaping. I loosened the fuel cap and there was a pressure release . I put the cap back and a few minutes later I could hear the same noise like vapor escaping.

What do I need to check and what is the primary cause of white smoke in a diesel?
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  #2  
Old June 28th, 2014, 02:34 PM
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What engine? Have you driven it to see if it clears up? Is power down?

White smoke is unburnt fuel or unburnt crankcase oil or coolant. Does is smell like diesel or coolant? It can be a lot of things, bad fuel, bad spray pattern, retarded timing, turbo seal...
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  #3  
Old June 28th, 2014, 05:32 PM
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Richard Ordowich
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I drove it around the block and it appears to have cleared up. It was diesel smell when it happened. Is this something to worry about?
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  #4  
Old June 28th, 2014, 06:47 PM
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John
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You shouldn't have any pressure in your fuel tank, the cap is vented unlike newer ones, whats on yours?

is the vent clear, on a 87 you should have a small split pin it the centre on the back side, remove the pin and a small round piece of cotton wool like stuff and make a new one and refit

For the clunk do you leave some tools on top of the engine? and the white smoke maybe coincidence?
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  #5  
Old June 28th, 2014, 08:26 PM
richord
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Richard Ordowich
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I will check the fuel cap vent. This is the first time it acted this way.

The clunk sounded like a valve clicking noise but very loud. Definitely not my tools I was working on the rear end. Didn't sound good. Loud clicking noise.

I Will test drive tomorrow and see what happens.
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  #6  
Old July 1st, 2014, 01:14 PM
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Richard Ordowich
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I looked at my fuel cap and it is not vented. Just a rubber gasket and the locking mechanism

When I remove it, there is a pressure relase and a bit of fuel leaked out the tank.

Is this the wrong fuel cap for this vehicle?
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  #7  
Old July 1st, 2014, 01:20 PM
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mark kellgren
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you need to figure out if your fuel tank has a vent line or not. if so, follow it and confirm it's setup properly.
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  #8  
Old July 1st, 2014, 02:24 PM
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Take it you have the side tank under the drivers seat? left and remove the seat cushion and seat box lid, you will see the top of the tank with a round fitting with two pipes running to the engine, unless you have a filter mid stream (which you should) also look under the rear wheel arch at the point of the fuel filler pipe, a big fat one and a smaller one going to the tank these are connected at the body by a Y pipe.

You say the cap is solid, how about some pictures as pictures tell a thousand words, still sounds like you have a wrong cap
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Still looking for that place where I can carry a paddle and get asked what's that.

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  #9  
Old July 1st, 2014, 05:34 PM
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My tank is under the passenger seat, it's a LHD. There are two hoses coming out of the top of the tank going to the engine. There is a small hose connected to the filler tube that goes back to the tank, an overflow?
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  #10  
Old July 1st, 2014, 06:06 PM
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It sounds like you got a later model fuel cap? is it plastic? pictures?

you said a small hose from the rear of the tank to the filler neck, 3/4" or smaller
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Edward Teach is the Blackbeard, and is a member of the Birmabright Brotherhood.

Still looking for that place where I can carry a paddle and get asked what's that.

JnK Services
FC101 GS FFR
57 LR 88" SXF 858
85 LR90
95 D1 Tdi
05 D3 HSE
97 XK8 BRG FHC For Sale
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  #11  
Old July 1st, 2014, 07:04 PM
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Richard Ordowich
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fuel cap

the hose is about 1" outside diameter.

here are the pictures.
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  #12  
Old July 1st, 2014, 07:22 PM
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Quote:
Originally Posted by richord View Post
the hose is about 1" outside diameter.

here are the pictures.
Not sure if it is the correct cap for a 87, my 86 has a big metal cap and is vented, that is not a vent type cap, not sure if you can get one to fit, you could drill a small hole it for the time being,
hope that's of use to you, I am thinking the PO changed it as the older caps can run expensive
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Edward Teach is the Blackbeard, and is a member of the Birmabright Brotherhood.

Still looking for that place where I can carry a paddle and get asked what's that.

JnK Services
FC101 GS FFR
57 LR 88" SXF 858
85 LR90
95 D1 Tdi
05 D3 HSE
97 XK8 BRG FHC For Sale
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  #13  
Old July 1st, 2014, 07:27 PM
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Quote:
Originally Posted by richord View Post
My truck has been sitting for a couple of weeks. Today I changed the rear shocks and started it just to test it out.

I heard a loud clank noise from the engine when I started it and lots of white smoke. I usually have a bit of white smoke when it first starts but this was a cloud. I stopped the engine, waited a few minutes and it started fine, no clank but now puffs lots of white smoke.

The only other weird thing is that as I was working on the truck I could hear a noise from the fuel tank like vapor escaping. I loosened the fuel cap and there was a pressure release . I put the cap back and a few minutes later I could hear the same noise like vapor escaping.

What do I need to check and what is the primary cause of white smoke in a diesel?
Check the timing beltů

"clank" like contact inside the motor?
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  #14  
Old July 1st, 2014, 07:41 PM
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John B.
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There is a vent inside those caps. If you take off the inside plate you will see it.
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  #15  
Old July 1st, 2014, 07:55 PM
richord
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Richard Ordowich
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I took off the plate but there is no hole and i get the whooshing sound when I open the cap.
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  #16  
Old July 1st, 2014, 09:08 PM
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John B.
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There are non vented versions, but they are not common. Here is a picture of one of mine with the plate off. The vent is under the little rocking plate on the right side. You will find balls and springs under there for venting in both directions.
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  #17  
Old July 2nd, 2014, 06:07 AM
richord
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Richard Ordowich
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Thanks John, my cap does not have the venting. I will search out to buy one before my tank collapse from the vacuum.
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  #18  
Old July 2nd, 2014, 06:26 AM
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Stant fuel caps are easy to find any auto store.
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  #19  
Old July 2nd, 2014, 02:24 PM
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Quote:
Originally Posted by Rocky View Post
Stant fuel caps are easy to find any auto store.
In that style?
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  #20  
Old July 2nd, 2014, 02:30 PM
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