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From: Hachiroku ハチロク on 25 Nov 2009 23:48
On Thu, 26 Nov 2009 01:53:30 +0000, Tegger wrote:

>>> Lol. Got a Fram filter on it? (As I duck for cover)
>>
>> AARRRGGGGGHHHHHH!!!!!!!!!!!!
>>
>> (I bet he does!)
>>
>>
>
>
> That would make zero difference to oil pressure.

See the other thread. I have been having oil press probs on two cars
consistantly since installing Frams on them. One is a Supra, 7M-GE, same
engine as the OP. When I was using OEM Toyota filters, no problem...





From: Steve W. on 26 Nov 2009 00:23
muzician21 wrote:
> 89 Cressida w/7MGE - I just started seeing my oil pressure light going
> on today at low rpm - basically below about 800 rpm, particularly when
> in gear. Assuming the sensor is correct, is there any reason for this
> besides the oil pump? The engine only has about 40k miles since a
> rebuild, re-used the old oil pump which I assume is the original. Car
> has about 150k miles on it.
>
> What's the life expectancy of these pumps?
>
> Besides Ebay any good source for parts? Dealer wants most of $300 for
> one, the auto parts places apparently don't have it.
>
> Thanks for all input.

Install a REAL oil pressure gauge and see what you have.

The spec I found here says 15W-40 oil for that engine for normal use and
5W-30 for extreme COLD weather use.

--
Steve W.
From: Ray O on 26 Nov 2009 00:17

"muzician21" <muzician21(a)yahoo.com> wrote in message
news:fe305f70-bdc0-47e5-9f45-c483b2df943f(a)w19g2000yqk.googlegroups.com...
> 89 Cressida w/7MGE - I just started seeing my oil pressure light going
> on today at low rpm - basically below about 800 rpm, particularly when
> in gear. Assuming the sensor is correct, is there any reason for this
> besides the oil pump? The engine only has about 40k miles since a
> rebuild, re-used the old oil pump which I assume is the original. Car
> has about 150k miles on it.
>
> What's the life expectancy of these pumps?
>
> Besides Ebay any good source for parts? Dealer wants most of $300 for
> one, the auto parts places apparently don't have it.
>
> Thanks for all input.

When the low oil pressure warning light comes on, the first thing to check
is oil volume with the dipstick to make sure there is sufficient oil in the
oil pan.

Next, check the oil sender for leaks because a visual check costs nothing,
even though the symptoms you are describing don't point to a leaking oil
sender.

Is the oil sender is not leaking, remove the sender and install an oil
pressure gauge to measure actual oil pressure, using the figures hachiroku
posted.

Whoever rebuilt the engine should have measured the clearances between the
impeller, crescent, and body of the oil pump before reusing it. Whatever
caused the original engine to fail could have also caused oil pump wear.

The other thing to do when rebuilding an engine is to plasti-gauge the main
and connecting rod bearings to make sure there isn't excess clearance, which
can cause low oil pressure.

--

Ray O
(correct punctuation to reply)


From: Hachiroku ハチロク on 26 Nov 2009 00:40
On Thu, 26 Nov 2009 00:23:36 -0500, Steve W. wrote:

>> Thanks for all input.
>
> Install a REAL oil pressure gauge and see what you have.
>
> The spec I found here says 15W-40 oil for that engine for normal use and
> 5W-30 for extreme COLD weather use.

Wow. For a 7M-GE?!?!?



From: Hachiroku ハチロク on 26 Nov 2009 00:45
On Thu, 26 Nov 2009 00:23:36 -0500, Steve W. wrote:

> muzician21 wrote:
>> 89 Cressida w/7MGE - I just started seeing my oil pressure light going
>> on today at low rpm - basically below about 800 rpm, particularly when
>> in gear. Assuming the sensor is correct, is there any reason for this
>> besides the oil pump? The engine only has about 40k miles since a
>> rebuild, re-used the old oil pump which I assume is the original. Car
>> has about 150k miles on it.
>>
>> What's the life expectancy of these pumps?
>>
>> Besides Ebay any good source for parts? Dealer wants most of $300 for
>> one, the auto parts places apparently don't have it.
>>
>> Thanks for all input.
>
> Install a REAL oil pressure gauge and see what you have.
>
> The spec I found here says 15W-40 oil for that engine for normal use and
> 5W-30 for extreme COLD weather use.

I'll be dipped!


Engine Oil
Recommended viscosity: 20-100F 15w40-20w50, 0-80F 10w30-10w50, 50F and
below 5w30

I've been running 10W-40, and I only use the car in the summer.



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