Sump Dinted, Risk Of No Oil Flow?

[51NNA]

Hi all , i recently put an rb25 in my 32 and after putting it in i realised the sump has a fair sized dint where the oil pickup is, im getting plenty on oil preasure acording to my dash but is it posible to have preasure and no flow? i will end up taking it off and fixing it but in the mean time i dont wont it to root my engine.

cheers.

[Hanaldo]

Well pressure is a measure of restriction to flow... So I don't think you are asking the right question

In all seriousness though, they can take a fair whack before it causes problems. How big is the dent?

[51NNA]

haha yea well i thought that but after my old engine putting a rod threw the block i can just keep picturing it happing to my new engine lol, the dent is roughly 25 to 30 mil deep

[Nee-san]

I had a crack extending from the sump, to the lip through the n1 oil pump that was leaking at a rate of atleast 1L of oil per week.

Car was fine .

[51NNA]

lol nice

[blk94r33]

Sump off/engine out, check it properly.

You can have pressure, but if the pick-up/mounting is cracked, it can suck air and f*** stuff...

[Adriano]

Dont need to pull the motor out to remove the sump.

[blk94r33]

Dont need to pull the motor out to remove the sump.

Is a 32 different to a 33? Every time i've been under my car the only way I can see to remove the sump is K-frame out or engine out?

[JonnoHR31]

unless the dent is massive it'll be fine. i have 3 sumps here all with dents ranging from 30mm to 50+mm and all have worked fine

[51NNA]

ahh sweet thx guys =) yea its a k frame out job =(

[Craved]

im with adriano,

undo the piping and engine mounts, then lift the motor up and tilted back as far as it can go. it is a bitch, but possible.

[Rolls]

Get a straw and blow through it until you get 10psi, get a huge 20mm wide straw and blow through it until you get 10psi. Are they both supplying the same amount of air?

So checking oil pressure is not a sufficient test to see if the pickup is working as expected, you really need to take the sump off and check, and if you do that you might as well replace it.

[Walk510]

different story rolls as its the pickup so its vacuum

[Rolls]

different story rolls as its the pickup so its vacuum

won't it just suck harder through the smaller hole?

edit: actually you are right, it will drop

Edited May 9, 2011 by Rolls

[Zane]

I have had a dented sump for about 6 years and never had any issues. Car was jacked up by a friend at a track day while I was cracking the wheel nuts to check the brakes. Obviously the sump looked like the cross member to him and the weight of the front end on the jack resulted in the sump being pushed up at least 25-30mm. Never realised it for weeks but the car has never had any oil issues so the damage internally must be minimal. I figured I just got lucky but monitor the pressure gauge religiously when giving it the boot.

Something I've always wondered was where the oil pickup is located in relation to, say, the sump plug? Does anyone have a pic of an RB25 with the sump off?

Z

[JonnoHR31]

got myne off atm, if i remember i'll take a pic while im putting it back together.

also, you'll actually bend the pickup tube before blocking it as it has a fairly solid gauze filter on the bottom. the rb30 that i just pulled apart was dented ~40mm and the sump was just touching the bottom of the filter.

[Beer Baron]

mate get it off and fix it. all the people saying it's no problem are living in a fantasy. the pickup is very close to the bottom of the sump if it's not that's another problem. a dent in the sump also changes the shape so oil is more easily run AWAy from the pick-up. on top of that it can damage the pick-up itself, kinded pick-up tube, broken pick-up tube, squashed pick-up mouth. it's not a big deal to remove the sump and beat it flat. it's a hell of a lot easier than doing a set of big end bearings that's for sure.

[blk94r33]

Get a straw and blow through it until you get 10psi, get a huge 20mm wide straw and blow through it until you get 10psi. Are they both supplying the same amount of air?

So checking oil pressure is not a sufficient test to see if the pickup is working as expected, you really need to take the sump off and check, and if you do that you might as well replace it.

My point exactly, but with vacuum not pressure.

mate get it off and fix it. all the people saying it's no problem are living in a fantasy. the pickup is very close to the bottom of the sump if it's not that's another problem. a dent in the sump also changes the shape so oil is more easily run AWAy from the pick-up. on top of that it can damage the pick-up itself, kinded pick-up tube, broken pick-up tube, squashed pick-up mouth. it's not a big deal to remove the sump and beat it flat. it's a hell of a lot easier than doing a set of big end bearings that's for sure.

Precisely. I'd rather remove the sump to check the oil pick up than the engine to rebuild it...