Black Smoke

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Date: Sat, 13 Dec 1997 08:23:00
From: Charles 
Subject: Smoking when climbing (22RE)
To: Toy4x4@tlca.org

At 09:12 PM 12/12/97 -0800, you wrote:
>
> On low-speed climbs, my 120k miles '88 22RE will smoke after 10-15
> minutes. Doesn't matter what gear, or if the revs are kept high 
> (>3500). I can get it to also do it just sitting in an angled 
> driveway (mine unfortunately) idling for about the same amount 
> of time.  The smoke is blueish/white, not black/grey.  Smells a 
> lot like synthetics, not like oil burning (but I'm running 
> standard Castrol, not synthetic).  
> Also during this phase of smoking, the whole top end is really 
> rattling, sounds like the timing is off as well, a possible 
> computer over-compensation.  The fix for me is to rev up the 
> engine a minute or so (clears out).  This never occurs at speed 
> though - like over 20 MPH.

I had exactly the same problem I removed the valve cover and checked 
the oil galley at the back of the head. Guess what? It was almost
COMPLETELY clogged!!! 

This was causing the oil to pool near the valves because not enough
oil was draining thru the galley.

I took a hangar and pushed all the crap down 
thru the galley then took some wide pipe cleaners and ran them thru
the galley.

I immediately changed the oil and filled the engine with some straight
5W ran the engine for about five minutes then changes the oil again.
This time back to my normal oil.

After that no more smoke and no more rattle in the top end.

Charles Brooks
cbrooks1@mail.tqci.net

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Date: Wed, 28 Jan 1998 18:22:56 -0800
From: James Brink 
Subject: what causes oil burning?
To: Toy4x4@tlca.org

DRM033 wrote:
> 
> Someone described what it does when your engine is burning oil.  Well, mine
> has occasional puffs at startup.  What are possible causes of this and
> possible fixes?

Worn piston rings
Worn valve seals
Worn valve guides
Inoperative crankcase ventilation system
Overfilled crankcase

The PCV valve and hoses should be free of obstructions.
Make sure the crankcase oil level is correct. If too high, the oil can
foam in the cylinder head and run past the valve seals and down the
guides.

Worn valve guides allow oil into the combustion chamber. Soulution:
Valve job.

Bad valve stem seals allow the oil lubing the top end of the valves to
run down into the combustion chamber as well. These can be replaced with
the cylinder head on the vehicle.

Worn rings, well, major engine teardown and overhaul time.

Sounds like you have bad seals, from your comment about a bit of smoke
upon startup.

- -- 

Jim Brink, Toyota/ASE Certified Technician	1986 Std. Bed 4x4
Manhattan Beach, CA				32x11.50/15 BFG M/Ts
ToyTech@Off-Road.com
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TLCA - Friends of the Mojave Road (FOMR) - CA4WDC

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