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#1: Volvo V70 oil pressure issue

Posted on 2008-03-13 19:08:46 by Jonathan Ward

I'm working on a 200 Volvo V70-XC. 96K miles. It's acting like there
might be an oil pressure problem. Here's the story:

After a recent oil change, the oil warning light on the dash starts to
light on startup, goes out as soon as the revs are anywhere above
idle, then stays out during driving, only to come back on during
braking and at idle. Braking downhill seems to cause it to light
earlier. Weird.

I replaced the oil pressure sending unit, which seems like the most
obvious thing to do. The oil change guys installed 5W-30 motor oil,
which appears to be the spec for this engine. The oil level on the
dipstick is correct. Experience tells me that this car "shouldn't"
have anywhere enough miles on it -- given basic service -- to allow
bearing wear that would be significant enough to affect oil pressure.
Volvo engines are supposed to be able to run 300K miles without
problems.

Should I try using a heavier weight oil? Could it be that there's
another sender/sensor connected to the oil light? I can't find a
decent manual on this car, as apparently Haynes didn't write one for
the 1998-200) V-series.

Any ideas or thoughts much appreciated!

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#2: Re: Volvo V70 oil pressure issue

Posted on 2008-03-13 19:43:49 by kludge

In article &lt;<a href="mailto:0935afc8-4376-4706-a55c-b866918002f5&#64;m34g2000hsc.googlegroups.com" target="_blank">0935afc8-4376-4706-a55c-b866918002f5&#64;m34g2000hsc.googlegroups.com</a>&gt;,
&gt;
&gt;I replaced the oil pressure sending unit, which seems like the most
&gt;obvious thing to do. The oil change guys installed 5W-30 motor oil,
&gt;which appears to be the spec for this engine. The oil level on the
&gt;dipstick is correct. Experience tells me that this car &quot;shouldn't&quot;
&gt;have anywhere enough miles on it -- given basic service -- to allow
&gt;bearing wear that would be significant enough to affect oil pressure.
&gt;Volvo engines are supposed to be able to run 300K miles without
&gt;problems.

The engine can run 300k miles, but the oil pump may not. Put a gauge
in place of the sending unit and measure pressure at idle. If it's
too low, which it almost certainly will be, pull the pan and check out
the oil pump. If it appears worn, replace it. If it appears sludged
up, clean it out and consider flushing the oil system.

&gt;Should I try using a heavier weight oil? Could it be that there's
&gt;another sender/sensor connected to the oil light? I can't find a
&gt;decent manual on this car, as apparently Haynes didn't write one for
&gt;the 1998-200) V-series.

Spend the money for the factory manual, because you are going to need it.

A heavier weight oil might be a good temporary fix if your bearings are
worn, but I bet they aren't. Either your oil pump is bad, or the oil
system is sludged up, and pulling the pan will tell you which.
--scott
--
&quot;C'est un Nagra. C'est suisse, et tres, tres precis.&quot;

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#3: Re: Volvo V70 oil pressure issue

Posted on 2008-03-15 17:44:49 by jim beam

Jonathan Ward wrote:
&gt; I'm working on a 200 Volvo V70-XC. 96K miles. It's acting like there
&gt; might be an oil pressure problem. Here's the story:
&gt;
&gt; After a recent oil change, the oil warning light on the dash starts to
&gt; light on startup, goes out as soon as the revs are anywhere above
&gt; idle, then stays out during driving, only to come back on during
&gt; braking and at idle. Braking downhill seems to cause it to light
&gt; earlier. Weird.
&gt;
&gt; I replaced the oil pressure sending unit, which seems like the most
&gt; obvious thing to do.

let's get back to that...


&gt; The oil change guys installed 5W-30 motor oil,

they /say/ they installed that grade. it's more than possible that
5w-20 was mistakenly installed since that's quite a common grade these days.


&gt; which appears to be the spec for this engine. The oil level on the
&gt; dipstick is correct. Experience tells me that this car &quot;shouldn't&quot;
&gt; have anywhere enough miles on it -- given basic service -- to allow
&gt; bearing wear that would be significant enough to affect oil pressure.
&gt; Volvo engines are supposed to be able to run 300K miles without
&gt; problems.
&gt;
&gt; Should I try using a heavier weight oil? Could it be that there's
&gt; another sender/sensor connected to the oil light? I can't find a
&gt; decent manual on this car, as apparently Haynes didn't write one for
&gt; the 1998-200) V-series.
&gt;
&gt; Any ideas or thoughts much appreciated!

if the problem arose immediately after an oil change, the first suspect
is the oil, not the sender unit or any other componentry. suggest you
change the oil again yourself - that way you can ensure the factory
recommended grade of oil is actually used. don't cheap out on it either
- buy a reputable brand. use a decent filter too - i suggest avoiding fram.

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#4: Re: Volvo V70 oil pressure issue

Posted on 2008-03-17 18:28:39 by Abo

Scott Dorsey wrote:
&gt; In article &lt;<a href="mailto:0935afc8-4376-4706-a55c-b866918002f5&#64;m34g2000hsc.googlegroups.com" target="_blank">0935afc8-4376-4706-a55c-b866918002f5&#64;m34g2000hsc.googlegroups.com</a>&gt;,
&gt;&gt; I replaced the oil pressure sending unit, which seems like the most
&gt;&gt; obvious thing to do. The oil change guys installed 5W-30 motor oil,
&gt;&gt; which appears to be the spec for this engine. The oil level on the
&gt;&gt; dipstick is correct. Experience tells me that this car &quot;shouldn't&quot;
&gt;&gt; have anywhere enough miles on it -- given basic service -- to allow
&gt;&gt; bearing wear that would be significant enough to affect oil pressure.
&gt;&gt; Volvo engines are supposed to be able to run 300K miles without
&gt;&gt; problems.
&gt;
&gt; The engine can run 300k miles, but the oil pump may not. Put a gauge
&gt; in place of the sending unit and measure pressure at idle. If it's
&gt; too low, which it almost certainly will be, pull the pan and check out
&gt; the oil pump. If it appears worn, replace it. If it appears sludged
&gt; up, clean it out and consider flushing the oil system.

Agreed, and other things to check include the oil filter (did they use
the right one? Did the one they installed suffer an internal failure?)
and the oil pickup in the pan (any chance you recently acquired a new
oil pan dent that could have pushed the pickup screen out of place or
even broken it?

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#5: Re: Volvo V70 oil pressure issue

Posted on 2008-03-17 22:57:24 by cuhulin

America lost over four hundred Soldiers in World War Two,,, Bombing some
German ball bearing factories.So-called neutrel Sweden took up the
slack, supplying ball bearings to Nazi Germany.There is NO Way I
will/want to ever own anything made in Sweden, or Switzerland
either.Switzerland was working both sides of the coin in World War Two.
cuhulin

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#6: Re: Volvo V70 oil pressure issue

Posted on 2008-03-18 01:32:31 by Rodan

&lt;<a href="mailto:cuhulin&#64;webtv.net" target="_blank">cuhulin&#64;webtv.net</a>&gt; wrote:

America lost over four hundred Soldiers in World War Two, Bombing
German ball bearing factories. So-called [neutral] Sweden took up
the slack, supplying ball bearings to Nazi Germany. NO WAY will
I ever own anything made in Sweden or Switzerland. Switzerland
was working both sides of the coin in World War Two.
________________________________________________________

The citizens of Sweden and Switzerland in 2008 are not the same
persons as the government officials in those countries in the 1940s.

The citizens of Japan and Germany in 2008 are not the same
persons as the government officials in those countries in the 1940s.

There is no reason to hate innocent descendants for historic acts.
Welcome all those of good will to the family of peaceful nations.

Let us focus our anger on those who TODAY strive to slaughter
all of civilized humanity on behalf of a bloodthirsty religion.

Rodan.

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