smokeing on start up
Lexus Champion
Joined: Mar 2004
Posts: 1,973
Likes: 10
From: Arizona
Has the coolant been serviced and changed every 30,000 miles?
It could chemically breakdown and cause corrosion to the head gaskets or intake manifold gasket. This will allow coolant to weep into the combustion chambers. Coolant usually burns white.
It could chemically breakdown and cause corrosion to the head gaskets or intake manifold gasket. This will allow coolant to weep into the combustion chambers. Coolant usually burns white.
Lead Lap
Joined: Apr 2004
Posts: 414
Likes: 4
From: Alabama
White smoke on start-up is one of the signs of a failure of the air control valve in the power steering pump. This problem is very common on the early and mid-90's LS models.
Watch the power steering fluid level very closely. If it's dropping, the fluid may be leaking past the valve and being drawn into the intake manifold.
The replacement valves are relatively cheap ($80.00), and the replacement procedure is fairly simple.
Watch the power steering fluid level very closely. If it's dropping, the fluid may be leaking past the valve and being drawn into the intake manifold.
The replacement valves are relatively cheap ($80.00), and the replacement procedure is fairly simple.
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Lexus Champion
Joined: May 2002
Posts: 2,781
Likes: 6
From: Georgia
Originally Posted by biglexass
its white.it is an ls 400 94 with 150,xxx miles on it.iam running synthic.
On the side note: check your power steering fluid as well. I've seen a lot of the 1st gen LS with vacuum switching valve on the side of power steering pump leaking internally. If you look at the power steering pump, you will see 2 vacuum hoses attached to the PS pump via VSV( vacuum switching valve) and those vacuum hoses are connected directly onto the intake manifold. The check valve inside the VSV may get stuck oponed and caused the PS fluid to leaks into the combustion cambers( cylinders).
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Lexus Champion
Joined: May 2002
Posts: 2,781
Likes: 6
From: Georgia
Originally Posted by CUMan
White smoke on start-up is one of the signs of a failure of the air control valve in the power steering pump. This problem is very common on the early and mid-90's LS models.
Watch the power steering fluid level very closely. If it's dropping, the fluid may be leaking past the valve and being drawn into the intake manifold.
The replacement valves are relatively cheap ($80.00), and the replacement procedure is fairly simple.
Watch the power steering fluid level very closely. If it's dropping, the fluid may be leaking past the valve and being drawn into the intake manifold.
The replacement valves are relatively cheap ($80.00), and the replacement procedure is fairly simple.
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kforbez88
LS - 1st and 2nd Gen (1990-2000)
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Jul 15, 2018 06:24 AM
