Oil pressure waaaay too high ..., happened suddenly |
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Oil pressure waaaay too high ..., happened suddenly |
SirAndy |
Dec 17 2007, 10:46 PM
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#1
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
this morning, i had to go to a meeting in SF and the car was running fine and all was good.
then, this evening i went to pick up my GF from work and when i started the car, the oil pressure went through the roof. i have the 0-5 gauge and normally the pressure at idle is about ~2 and under full load close to 5. now i'm getting 4-5 at idle and the needle hits the stop under load. (IMG:style_emoticons/default/WTF.gif) i checked on the oil cooler and thermostat, both work fine, supply and return line get hot/warm, so the oil is circulating in the lines. they engine sounds normal and i don't see any oil squirting out of the block anywhere. anyone know what could be wrong? (IMG:style_emoticons/default/confused24.gif) Andy PS: the motor is a '95 3.6L from a 993 ... |
jimtab |
Dec 18 2007, 12:15 AM
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#2
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Advanced Member Group: Members Posts: 3,477 Joined: 5-January 03 From: Pacifica, California Member No.: 91 Region Association: Northern California |
Andy, could it be the sender? I mean if everything else seems to be ok and it's running fine, I'd be suspicious of the sender/sender connection....just my .02....and worth every penny.
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Dr. Roger |
Dec 18 2007, 12:52 AM
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#3
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
U screw with the bypass/pressure release spring valve?
Let's hope its the gauge... (IMG:style_emoticons/default/wink.gif) (IMG:http://www.rennsportsystems.com/pumpcs.jpg) |
Mugs914 |
Dec 18 2007, 01:14 AM
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#4
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"Hey, yellow IS faster!" Group: Members Posts: 618 Joined: 22-July 05 From: Temple TEXAS Member No.: 4,452 Region Association: Southwest Region |
U screw with the bypass/pressure release spring valve? Let's hope its the gauge... (IMG:style_emoticons/default/wink.gif) (IMG:http://www.rennsportsystems.com/pumpcs.jpg) Yeah, I was thinking the same thing. Check the pressure relief pistons and springs in the case. If one gets stuck in the bore it could send the pressure to the moon... |
SirAndy |
Dec 18 2007, 12:03 PM
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#5
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
same thing today ... i didn't touch anything on the motor. it all started when it started raining. coincidence? my motor is exposed to the elements, maybe the wire is shorting out due to the rain ...
(IMG:style_emoticons/default/idea.gif) Andy |
SirAndy |
Dec 19 2007, 07:09 PM
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#6
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Mystery solved! (IMG:style_emoticons/default/smilie_pokal.gif)
turns out, i was right about the rain. the sending unit on top of the engine block is exposed to the elements and the moisture from the recent rain storms was shorting out the pressure connector to the engine block. after a day without rain and a nice drive to warm up and dry out things, everything is back to normal ... (IMG:style_emoticons/default/aktion035.gif) now, all i need is to find some sort of rubber boot to cover the sender ... (IMG:style_emoticons/default/idea.gif) Andy |
Grngoat |
Dec 20 2007, 01:37 AM
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#7
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Lurker Member Group: Members Posts: 158 Joined: 17-October 04 From: Fort Worth, TX Member No.: 2,967 Region Association: Southwest Region |
Just slightly off topic, but what sending unit are you using? I have a 5 bar gauge out of a 911 SC, but am still using the stock 993 sending unit which I understand to be calibrated for 10 bars. So the oil pressure reads double. Basically, the needle is pegged the instant the motor starts, so it acts more like an idiot light than a gauge. Have you fixed this somehow?
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SirAndy |
Dec 20 2007, 01:43 AM
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#8
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Just slightly off topic, but what sending unit are you using? I have a 5 bar gauge out of a 911 SC, but am still using the stock 993 sending unit which I understand to be calibrated for 10 bars. So the oil pressure reads double. Basically, the needle is pegged the instant the motor starts, so it acts more like an idiot light than a gauge. Have you fixed this somehow? yes, i got a stock 993 gauge ... (IMG:style_emoticons/default/biggrin.gif) which works very well with the stock 993 sending unit. the 993 sending unit is 5 bar, the earlier 911 sending units are 10 bar. i tried to use a early 911 gauge with the 5 bar range, but it never worked right. so i went and got the 993 gauge ... now i have the correct oiltemp, oilpressure and check engine light all in one gauge. plus, i used some of the other "spare" warning lights to hook up additional "idiot" lights ... (IMG:style_emoticons/default/bye1.gif) Andy |
Grngoat |
Dec 20 2007, 01:51 AM
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#9
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Lurker Member Group: Members Posts: 158 Joined: 17-October 04 From: Fort Worth, TX Member No.: 2,967 Region Association: Southwest Region |
That's right, I remember seeing pics of your gauges before. That probably would have been easier, but I've spend enough money on the gauges, I'm not changing now!
Yeah, I need to find a 10 bar sender. That makes more sense when I think about the math. I've got the right sender for the temp gauge, check engine light is mounted in the console. Well, it's laying loose in the console and I'm going to mount it one day, but you get the idea. Thanks. |
sww914 |
Dec 20 2007, 02:01 AM
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#10
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Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
now, all i need is to find some sort of rubber boot to cover the sender ... (IMG:style_emoticons/default/idea.gif) Andy Here's one (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) Attached image(s) |
purple |
Dec 20 2007, 06:58 AM
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#11
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Pigeon feeders attract me Group: Members Posts: 938 Joined: 24-July 07 From: Houston, TX Member No.: 7,942 Region Association: None |
What's bad about the oil pressure going really high?
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mudfoot76 |
Dec 20 2007, 12:40 PM
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#12
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Currently teenerless :-( Group: Members Posts: 946 Joined: 18-March 04 From: Carmel, IN Member No.: 1,814 Region Association: None |
What's bad about the oil pressure going really high? If part of the system is blocked, then either oil isn't getting to parts that need to be oiled, or it is bypassing the cooler, or..... I had bad pressure spike on my 2.0L and it literally blew out the oil filter. Puked oil all over the ground. I'd say that is bad. But hopefully Andy's problem is something (relatively) simple and just the sender is bad... |
SLITS |
Dec 20 2007, 12:56 PM
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#13
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
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GWN7 |
Dec 20 2007, 01:07 PM
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#14
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King of Road Trips Group: Members Posts: 6,280 Joined: 31-December 02 From: Winnipeg, MB, Canada Member No.: 56 Region Association: Northstar Region |
Mystery solved! (IMG:style_emoticons/default/smilie_pokal.gif) now, all i need is to find some sort of rubber boot to cover the sender ... (IMG:style_emoticons/default/idea.gif) Andy What do you need? I can do some very soft/flexible rubber |
r_towle |
Dec 20 2007, 01:15 PM
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#15
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Custom Member Group: Members Posts: 24,594 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
get the car umbrella cover.
The smaller one that covers the roof and engine lid. Carry a can of the computer compressed air with you. Blow it off when it rains. Rich |
orange914 |
Dec 20 2007, 07:52 PM
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#16
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
What's bad about the oil pressure going really high? If part of the system is blocked, then either oil isn't getting to parts that need to be oiled, or it is bypassing the cooler, or..... I had bad pressure spike on my 2.0L and it literally blew out the oil filter. Puked oil all over the ground. I'd say that is bad. But hopefully Andy's problem is something (relatively) simple and just the sender is bad... or you canblow out oil galley plugs (IMG:style_emoticons/default/barf.gif) |
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