Oil weight and pressure relation - Page 3

1998ta__1991rs · 08-17-2012, 09:56 PM

Quote:

Originally Posted by Carlrx7

heard about that, just run an extra quart...

That could do as much harm as running it dry

03SVTCOBRA · 08-17-2012, 10:02 PM

Quote:

Originally Posted by 1998ta__1991rs

That could do as much harm as running it dry

Thats what i say, why put oil in it?

blkscls1z · 08-17-2012, 11:02 PM

Quote:

Originally Posted by 1998ta__1991rs

That could do as much harm as running it dry

Been running an extra quart in mine for years.

Carlrx7 · 08-18-2012, 09:31 AM

Quote:

Originally Posted by 1998ta__1991rs

That could do as much harm as running it dry

it's mentioned in the corvette manual to add an extra quart when racing, wet sumps of course..

minytrker · 08-18-2012, 09:52 AM

Quote:

Originally Posted by Carlrx7

it's mentioned in the corvette manual to add an extra quart when racing, wet sumps of course..

I was going to post the same thing

jmd · 08-18-2012, 10:06 AM

when i had the stroker motor i ran an extra quart for the hv pump.

GreebeanZ28 · 08-18-2012, 11:05 AM

601 CASH MONIES for the truck right now. Six hunned one. CASH.

WWhittle · 08-18-2012, 11:47 AM

I was going to ask if you were sure it had the right amount of oil in it- looks like some others are suggesting that as well.

Another question- you said you saw the pressure drop when you were stopping at a light? Were you braking when you saw the pressure drop or were you sitting at the light?

PapaBear · 08-18-2012, 01:40 PM

Quote:

Originally Posted by WWhittle

I was going to ask if you were sure it had the right amount of oil in it- looks like some others are suggesting that as well.

Another question- you said you saw the pressure drop when you were stopping at a light? Were you braking when you saw the pressure drop or were you sitting at the light?

I have always run an extra quart, and Alvin as well. I was stopped at the light. Either way, AWD TBSS is a front sump pan, so stopping would send more oil to pickup.

blueyed tuner · 08-19-2012, 02:11 PM

I would have to say leaking o-ring. I have had alot of problems lately with mechanical assemblies that seal with an o-ring in motors and auto trans. O-rings are a very simple sealing device that work great when they work or they can cause you to go postal. I have seen slight differences in thickness and quality. Recently experienced same problem you are having and changed the oring and problem solved. Upon observation of the removed oring I noticed a slight parting line on the inside and the outside. I thought maybe it was pinching between the pan and block so I went and got some new ones and noticed these were the same way. I then went to a different parts store and bought more. This time these were completely slick. I greased them up and installed. The oil pressure was now 10 psi higher. My conclusion is the little rubber lip on the cheap china made oring was not letting it properly seal. Not completely sure if this is your problem, but it gives you something to check. Hope this helps and good luck.

PapaBear · 08-19-2012, 05:52 PM

O ring is perfect.

1iron · 08-19-2012, 06:06 PM

Blue not red for tbss?

PapaBear · 08-19-2012, 06:09 PM

That's the consensus from most. I know the red is a little thicker, but everyone said the blue was the one.

LXtasy · 08-19-2012, 06:21 PM

These tbss sure use different stuff than the other ls motors. Must be bothersome when ordering parts.

adamcs · 08-19-2012, 06:50 PM

Maybe you dropped your badge in there when you were working on it and its getting stuck on the pickup

blueyed tuner · 08-19-2012, 07:25 PM

Quote:

Originally Posted by PapaBear

O ring is perfect.

Damn sure looks perfect to me. Man I hate that. It kills me when there is a problem and you go back and look and its perfect.

PapaBear · 08-19-2012, 07:27 PM

Still questioning the pump at this point I guess. Blueprinted melling will be here this week I hope and comes with both o rings. Going to see what precision pumps says about which one to use.

By the way, pulling pickup tube bolt wasn't that bad with pan on. Hope installation is as cooperative. Fishing line around the bolt was a life saver.

blueyed tuner · 08-19-2012, 07:36 PM

Just being curious. Has anyone actually checked the diameter of a gm camshaft on the journals vs the ones on a new cam ? Just seems like alot of oil pressure issues pop up after a cam change. Just thinking about clearance isuues and bleeding off more oil with a cam change.

schardbody · 08-19-2012, 08:24 PM

only time I've seen reports of pressure issues after came swap is when the pickup has been removed, low mileage swaps with no chain or pump upgrade never seem to have a problem. I still think the relief valve is sticking.

98z-28camaro · 08-19-2012, 09:01 PM

Quote:

Originally Posted by blueyed tuner

Just being curious. Has anyone actually checked the diameter of a gm camshaft on the journals vs the ones on a new cam ? Just seems like alot of oil pressure issues pop up after a cam change. Just thinking about clearance isuues and bleeding off more oil with a cam change.

well most ls1 aftermarket cams are still made by reputable companies like comp cams and lunati.....most of the people who do cam changes do the oil pump also... when the do the oil pump there is a small o ring that always gets pinched....90% of the time

08-18-2012, 10:06 AM	#46
jmd Senior Member Join Date: May 2008 Posts: 3,177	when i had the stroker motor i ran an extra quart for the hv pump. __________________ Cadillac man

08-18-2012, 11:05 AM	#47
GreebeanZ28 Senior Member Join Date: Oct 2011 Location: Easley Posts: 2,300	601 CASH MONIES for the truck right now. Six hunned one. CASH. __________________

08-19-2012, 02:11 PM	#50
blueyed tuner Senior Member Join Date: Nov 2011 Location: Summerville SC Posts: 214	I would have to say leaking o-ring. I have had alot of problems lately with mechanical assemblies that seal with an o-ring in motors and auto trans. O-rings are a very simple sealing device that work great when they work or they can cause you to go postal. I have seen slight differences in thickness and quality. Recently experienced same problem you are having and changed the oring and problem solved. Upon observation of the removed oring I noticed a slight parting line on the inside and the outside. I thought maybe it was pinching between the pan and block so I went and got some new ones and noticed these were the same way. I then went to a different parts store and bought more. This time these were completely slick. I greased them up and installed. The oil pressure was now 10 psi higher. My conclusion is the little rubber lip on the cheap china made oring was not letting it properly seal. Not completely sure if this is your problem, but it gives you something to check. Hope this helps and good luck. __________________

08-19-2012, 06:21 PM	#54
LXtasy Senior Member Join Date: Dec 2006 Location: Summerville, SC Posts: 9,564	These tbss sure use different stuff than the other ls motors. Must be bothersome when ordering parts. __________________

08-19-2012, 07:36 PM	#58
blueyed tuner Senior Member Join Date: Nov 2011 Location: Summerville SC Posts: 214	Just being curious. Has anyone actually checked the diameter of a gm camshaft on the journals vs the ones on a new cam ? Just seems like alot of oil pressure issues pop up after a cam change. Just thinking about clearance isuues and bleeding off more oil with a cam change. __________________

08-18-2012, 11:47 AM	#48
WWhittle Senior Member Join Date: Apr 2008 Location: Mt. Pleasant, SC Posts: 3,899	I was going to ask if you were sure it had the right amount of oil in it- looks like some others are suggesting that as well. Another question- you said you saw the pressure drop when you were stopping at a light? Were you braking when you saw the pressure drop or were you sitting at the light?

08-19-2012, 05:52 PM	#51
PapaBear Senior Member Join Date: Aug 2010 Posts: 2,809	O ring is perfect.

08-19-2012, 06:06 PM	#52
1iron Senior Member Join Date: May 2007 Posts: 2,014	Blue not red for tbss?

08-19-2012, 06:09 PM	#53
PapaBear Senior Member Join Date: Aug 2010 Posts: 2,809	That's the consensus from most. I know the red is a little thicker, but everyone said the blue was the one.

08-19-2012, 06:50 PM	#55
adamcs Senior Member Join Date: Aug 2011 Location: camp lejeune/ goose creek, sc Posts: 914	Maybe you dropped your badge in there when you were working on it and its getting stuck on the pickup

08-19-2012, 07:27 PM	#57
PapaBear Senior Member Join Date: Aug 2010 Posts: 2,809	Still questioning the pump at this point I guess. Blueprinted melling will be here this week I hope and comes with both o rings. Going to see what precision pumps says about which one to use. By the way, pulling pickup tube bolt wasn't that bad with pan on. Hope installation is as cooperative. Fishing line around the bolt was a life saver.

08-19-2012, 08:24 PM	#59
schardbody Senior Member Join Date: Sep 2008 Posts: 1,158	only time I've seen reports of pressure issues after came swap is when the pickup has been removed, low mileage swaps with no chain or pump upgrade never seem to have a problem. I still think the relief valve is sticking.