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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
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YOUR RESEARCHInstalled an extended oil sump
Leading reported evidence
Check sealant this morning
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
I checked the sealant this morning , it's drying nicely .
Leading evidence: 'Check sealant this morning' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check oil level in the morning' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
Hello everyone today I installed a 2 quart sump extension .
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Performed · outcome unconfirmed · Original poster
I purchased this used from Jake Raby when I worked for him .
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Hello everyone today I installed a 2 quart sump extension . I purchased this used from Jake Raby when I worked for him . It has some mods inside that Jake did . Anyway all went as expected I am going to let the sealant dry for 2 days before adding oil . I am hoping no leaks .
I am going to purchase the LN Engineering skid plate next and install that . I don't race but I am taking precautions to make my 3.8 live a long time . I have the UAOS so should be able to fill with 11 quarts .
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Nice job! Looks like you did not use excessive sealant. Which sealant did you use, there is an overwhelming amount of selection out there now.
A friend of mine with a 996 had one of these installed and the RTV was squeezing out all over the outside. Not long after his engine blew up and there was large chunks of RTV all over the oil pickup screen.
^^^ Thanks . I used Permatex gray RTV . I have seen enough sump plate installs to know roughly how much to use . A small amount of squeeze out is OK but a lot is asking for trouble . As long as it doesn't leak I used enough
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I checked the sealant this morning , it's drying nicely . I used an inspection mirror and flashlight and confirmed slight squeeze out the entire perimeter . Hopefully the interior is the same . Oil will go in tomorrow just to be extra cautious .
Generally speaking the sump extensions are available in .5 , 1 and 2 quart sizes . I went with the 2 quart because it was a used purchase at a good price . But the 2 quart makes the sump plate the lowest item of the engine . Hence the skid plate is a good idea . Not sure about the ground clearance on the .5 and 1 quart variety . I have the 2 quart on my Boxster but the engine is further forward in a mid engine . I do not have a skid plate on that car and have never hit/dragged the sump plate .
It's just something to consider before purchase . Like many things there are pluses and minuses . The risk of impact to me is worth the minor risk vs the reward of the extra oil capacity . And the risk is survivable with the additional skid plate . Obviously paying attention to speed bumps and steep angles is a wise move .
Today I added 10.5 quarts of oil and fired her up . I kept it on my lift so I could watch for an Exxon Valdez moment
. I am happy to report after 20 minutes she's bone dry . The sump was hot to the touch so should have been a good test .
I will let her set overnight and check oil level in the morning and adjust if needed . I am satisfied with the results just need to order the skid plate .
^^^ I am fortunate , living in north Georgia I am surrounded by great mountain roads . I have a 55 mile loop through the mountains that is my driving favorite . Lots of switch backs and elevation changes with fantastic views . I drive it often . I call it road therapy
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I've made the journey from TN to the Dawsonville area a number of times to and from AMP (Atlanta M'sports Park) via the back roads. There are lots of great winding roads through that area which is probably near where you like to ride.
To close this out I ended up at 11 quarts of oil added . This brought the level to halfway between the low and high mark on the dipstick . I feel comfortable running at that level .
I also have a vehicle with an extended sump and there is ongoing discussion on where to set the oil level. The two prevailing trains of though are to set it to the full line, same as before. The other is to set it close to the low line as this will reduce the frothing of the oil from the crank and rods hitting the oil level. I don’t actually know what is right however I do tend to run the oil on the low side as it seems to reduce the load on the breather system.
Did Jake give any advice on what to do with the oil level?
^^^ Jake recommends to run 11 quarts with the 2 quart extension . I think if you are running the OEM AOS you should not go more than 11 quarts . That is my opinion . That should bring the oil level to halfway on the dash gauge or dip stick .
Now if you are running the UAOS you can increase your oil level . Supposedly the diaphragm because of where it's mounted AND it being much better quality than OEM can take higher oil levels . I do have the UAOS but for street use I will stay at 11 quarts .
Another thing I forgot to mention . This extended sump also included the X51 style internal baffles that LN Engineering makes out of stainless steel . On a 996 when using that style of baffle you also have to change the swirl pots to the 997 version . And lastly the oil pickup is extended the same thickness as the sump extension so it sits where it's supposed to . I wanted to clarify in case anyone is thinking going this route and isn't knowledgeable on the subject . If you purchase new most kits contain everything needed .
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Finished the job yesterday by installing the LN Engineering/ Bilt Racing sump skid plate . It is made of stainless steel and very heavy duty . I feel better knowing the sump is protected from speed bumps or anything similar .
Fun fact : Charles Navarro the owner of LN Engineering hit a coyote carcass in the road at 70mph . When the sump skid plate hit the coyote he said it lifted the rear of the car up in the air . The skid plate was covered in fur/guts/blood but sustained zero damage . Good enough for me
