Blue smoke out tail pipe after idling
Jun 1, 2018 | 07:33 AM
#1
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From: Gaston, OR
Blue smoke out tail pipe after idling
Hey guys I need some advice on what direction to start with my problem. Its on my '87 4Runner 22re 5sp. I've been noticing just a slight hint of blue smoke (oil) coming out of the tail pipe, mainly at start up, it was so minimal oil burn that I didn't need to add any between oil changes. Fast forward to yesterday, I was sitting in line for about 20 minutes at a drive thru teller. When I left the amount of smoke was annoying, quickly approaching embarassing. After I drove for 2-3 blocks it had disappeared again. It appears I'm getting some oil pooling, but from where? I'm good at turning wrenches but only ok at diagnosis. Just looking for some advice on where to start looking for the culprit.
Jun 1, 2018 | 08:49 AM
#2
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From: 02176
Sounds like valve seals which is normally no big deal to change, but being as our trucks have the overhead rocker girdle held down by the head bolts, I am not sure what you can do. Can't remember if you can move the rocker to beside the valve retainers...
Jun 5, 2018 | 07:12 AM
#3
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From: Gaston, OR
I've been reading up on replacing the valve seals, some people say you can do it without pulling the head, others say you can't I think I'm going to lean towards pulling it and will just have a new headgasket ready.
Jun 5, 2018 | 06:10 PM
#4
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From: 02176
I’ve only had one experience with trying to remove the head bolts/rocker girdle without changing the head gasket and the head gasket did not last long afterwards.
When you get the head off, as you remove each valve spring, inspect each valve for carbon buildup and good contact with the seat.
also with the valve off the seat about a half inch, try to wiggle it side to side. That will quickly tell you the health of your valve guides.
if you have a full valve job by a machine shop, they will check these things. I would take the opportunity to lap the valves while you are in there.
if you find and carbon buildup you can chuck the valve in a drill and wire brush it off.
When you get the head off, as you remove each valve spring, inspect each valve for carbon buildup and good contact with the seat.
also with the valve off the seat about a half inch, try to wiggle it side to side. That will quickly tell you the health of your valve guides.
if you have a full valve job by a machine shop, they will check these things. I would take the opportunity to lap the valves while you are in there.
if you find and carbon buildup you can chuck the valve in a drill and wire brush it off.
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