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Old 06-04-2010, 08:02 AM
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Is there a manual oil sending unit that doesn't leak.....?

I've got a manual oil pressure gauge on my sbc 327. Gauge works good well, but I can't seem to find a decent sending unit that will not leak... Is there a unit to try that I am missing somewhere...? Any tips to keep them from leaking...? I am using the brass nipple that screws into the block and then another nipple that screws the plastic line into the bottom nipple. My leak is not at the line, but the brass fitting...? I have checked and it is tight. Any ideas...?

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Old 06-04-2010, 08:23 AM
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Manual oil pressure gauges typically don't have a sending unit.Try the copper line instead of plastic.You can buy the line seperately in most places.There should be a compression fitting in the too.Are you getting the compession fitting in the fitting where it needs to be?
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Old 06-04-2010, 08:28 AM
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Yeah, the compression ring is there. Just seems to be leaking from brass fittings...


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Originally Posted by BBCMudbogger
Manual oil pressure gauges typically don't have a sending unit.Try the copper line instead of plastic.You can buy the line seperately in most places.There should be a compression fitting in the too.Are you getting the compession fitting in the fitting where it needs to be?
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Old 06-04-2010, 08:58 AM
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If you over tighten the line to the fitting they will leak, start with snug.
I have used braided line and fitting in the past, never leaks.
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Old 06-04-2010, 09:10 AM
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Get the correct fitting

Hey Robbie, When using tubing connectors with plastic tubing you need to get the fittings with the insert that goes inside the tubing to keep the ferrel from cutting/crushing into the tubing. Also, tighten it finger tight, then 1/4 turn more with a wrench. Check for leaks, you may have to snug just a tad but never more than a 1/2 turn past finger tight. Better quality fittings give better results than the junky stuff too. olnolan
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Old 06-04-2010, 10:37 AM
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Thanks, appreicate the advice. Well, maybe I have it too tight... I will buy a new fitting pack and try again. Probably need to move towards some better quality fittings as well.... Would using some teflon tape help at all to seal the fittings together...?


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Originally Posted by OLNOLAN
Hey Robbie, When using tubing connectors with plastic tubing you need to get the fittings with the insert that goes inside the tubing to keep the ferrel from cutting/crushing into the tubing. Also, tighten it finger tight, then 1/4 turn more with a wrench. Check for leaks, you may have to snug just a tad but never more than a 1/2 turn past finger tight. Better quality fittings give better results than the junky stuff too. olnolan
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Old 06-04-2010, 10:43 AM
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teflon tape

Hey Robbie, The only place you need teflon tape is on the male pipe threads, none on the tubing end of the fitting. olnolan
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