1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Low oil pressure

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Old 05-04-09, 07:05 PM
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Low oil pressure

My oil pressure goes down to like 30psi and never goes over 60psi. I do have a slight leak in my oil pan gasket. Would the low pressure just be from the leak or do i have another problem?
Old 05-04-09, 08:00 PM
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probably not the leak. get a mechanical gauge from a parts store and put it where the electric one usually goes then get a good reading.
Old 05-04-09, 08:12 PM
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If you're going off of what the stock gauge says... well, don't.
Old 05-04-09, 10:44 PM
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Is it easy to hook one of those up?
Old 05-05-09, 11:40 AM
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should be fairly easy, i haven't installed one myself, but its pretty straight forward as far as i know, hardest part is probably finding a spot to put it at, it should also come with instructions and all that good stuff.
Old 05-05-09, 02:50 PM
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Simplest way to add an aftermarket op gauge is to cut the head off of the stock 'mushroom' sender, tap the 'stem' with a 3/8" NPT, then install the new gauge and sender.
Old 05-05-09, 10:48 PM
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Thanks for the help. I will be getting a new gauge within the next week or so. The hard part will be finding time to put it in.

What weight of oil would you recommend for my stock 12a? It has a weber 48ida carb.
Old 05-06-09, 08:12 PM
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I run 20W50 in the summer, 10W30 winter. If you need to know how to mod the oem sender for the new gauge, PM me your e-mail addy and I can send you a pic.
Old 05-07-09, 08:29 AM
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Originally Posted by trochoid
I run 20W50 in the summer, 10W30 winter. If you need to know how to mod the oem sender for the new gauge, PM me your e-mail addy and I can send you a pic.
I will like to know this too if you dont mind, please mail the info to n0ferz[at][gmail]

Thanks.
Old 05-07-09, 01:24 PM
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if you can post that pic here it'd be great, for future reference
Old 05-07-09, 08:09 PM
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Cut the 'stalk' off of the mushroom head at the red line. Tap with a 3/8" NPT tap. Hole is close enough to the correct pilot size it doesn't need drilling. Screw the stalk back into the engine block, then install the sender from the new mechanical gauge.

Attached Thumbnails Low oil pressure-oil-pressure-sender.jpg  
Old 05-08-09, 12:15 AM
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I had to kill a stock mushroom once when the BSP to NPT adaptor that came with the guage cracked. Cheap piece of junk. Then I tried a steel (not "to steal an") adapter from a Ricer car. It leaked which wasn't too surprising. I finally broke down and canibalized the mushroom and all is well, excpet for the unusable stock mushroom 'cap'.

Now I'm gettin' hungry for some mushrooms.
Old 05-08-09, 01:54 AM
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Originally Posted by Jeff20B
I had to kill a stock mushroom once when the BSP to NPT adaptor that came with the guage cracked. Cheap piece of junk. Then I tried a steel (not "to steal an") adapter from a Ricer car. It leaked which wasn't too surprising. I finally broke down and canibalized the mushroom and all is well, excpet for the unusable stock mushroom 'cap'.

Now I'm gettin' hungry for some mushrooms.
damn hippys. jk
Old 05-08-09, 03:46 AM
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30 psi of pressure at idle is good. 70 psi at full throttle is stock. nothing is wrong with your car.
Old 05-08-09, 07:18 AM
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well crap, i thought oil gauges came with universal fittings and they would just tap right in lol, oh well thanks for the info i need to replace mine soon
Old 05-08-09, 03:08 PM
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Mushrooms? Around here they got hunt morels in the woods. Heard they were going for 24 bucks a pound this spring. Now the 'other' kind are only legal in Native American Church cermonies. Been there, done that.
Old 05-08-09, 03:31 PM
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Anyway it seems yet another BSP to NPT adaptor has a leak. Looks like I'll have to gut another mushroom.
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