Stripped and cleaned my Accusump today.......

Stripped and cleaned my Accusump today.......

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Discussion

kylemrushall

Original Poster:

1,922 posts

203 months

Saturday 10th November 2007
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Hi

I have stripped and cleaned my accusump, i am very glad i did it was horrible!! The oil in it was as black as a black thing.

The engine had only done 2700 miles and i think the accusump will always have a horrible thick residue in it unless it is stipped and cleaned on a regular basis.

When you discharge the oil from the Accusump on an oilchange with the position of the outlet being in the centre of the unit i think it will always never empty fully??? I know the oil is supposed to circulate fully but when i dropped the oil from the sump it was not as black as what was in the Accusump.

Has anyone else found the same??


LuckyP

6,243 posts

224 months

Saturday 10th November 2007
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Yep. Sludgy.

Boosted LS1

21,165 posts

259 months

Saturday 10th November 2007
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Why is it black and sludgy? Is it from when the car had blowby and was being run in?

LuckyP

6,243 posts

224 months

Saturday 10th November 2007
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Boosted LS1 said:
Why is it black and sludgy? Is it from when the car had blowby and was being run in?
What's blow by?


bluesatin

3,114 posts

271 months

Sunday 11th November 2007
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Does anybody have instructions on stripping the Accusump and do you need any gaskets?

SkinnyBoy

4,635 posts

257 months

Sunday 11th November 2007
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http://www.accusump.com/accusump.pdf/instructions.pdf 

Edited by SkinnyBoy on Sunday 11th November 10:43

Pb3

1,064 posts

245 months

Sunday 11th November 2007
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Another job for the list then. Just looked at the manual, where does it talk about stripping down and rebuilding I seem to has missed it?

As for the sludge issue, how many of you run an oil line from the unfiltered side of the oil circuit. I know that method seems standard in the Ultima setup. When I installed an oil stat and remote filter I rectified this so that filtered oil goes to the Accusump, as they suggest. But for a year and with lots of blow by/bore washing and unfiltered oil I wonder how much sludge i've got!

kylemrushall

Original Poster:

1,922 posts

203 months

Sunday 11th November 2007
quotequote all
bluesatin said:
Does anybody have instructions on stripping the Accusump and do you need any gaskets?
no gaskets required just a 90 degree set of pliers to remove the internal circlips. The ends feel like they dont want to release but it is just the vacuum!

Steve_D

13,737 posts

257 months

Sunday 11th November 2007
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Pb3 said:
Another job for the list then. Just looked at the manual, where does it talk about stripping down and rebuilding I seem to has missed it?
That's because you're looking in the build manual not the service manual, silly.

Steve

bluesatin

3,114 posts

271 months

Sunday 2nd December 2007
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Steve,

What service manual?

Steve_D

13,737 posts

257 months

Sunday 2nd December 2007
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bluesatin said:
Steve,

What service manual?
Quite.

Steve

bluesatin

3,114 posts

271 months

Sunday 2nd December 2007
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Maybe a quick flush with petrol then!

Boosted LS1

21,165 posts

259 months

Sunday 2nd December 2007
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LuckyP said:
Boosted LS1 said:
Why is it black and sludgy? Is it from when the car had blowby and was being run in?
What's blow by?
Sorry Lucky, I missed this. Blowby is when combustion chamber gasses and carbon deposits etc get past the piston rings thus contaminating the oil on the bores and turning it black due to the soot/carbon etc. It's why your oil gets dirty after a while. So, the accusump could have primed itself with dirty oil? Just a thought.

bluesatin

3,114 posts

271 months

Monday 3rd December 2007
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I cleaned mine today- just normal black oil

craig-ultima

243 posts

232 months

Tuesday 4th December 2007
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I cleaned out my Accusump about 4 months ago when I blew my motor. I guessed (correctly) that there were metal shavings in the oil all the way into the accusump.

Here is what I did:
- remove unit
- drain oil
- record the air pressure of the fully empty unit (i.e. what is the gauge reading when the cylinder is completely discharged).
- remove pressure release valve, clean, blow out with air
- remove pressure gauge, soak, clean out with air and little bits of lint-free cloth

The real trick is removing the top or bottom of the tank itself. There are four holes in a square pattern. I machined up a plate with four posts to lock one end, and then put dowels in two of the holes in the other end and used a long bar to gently unscrew one end. If you don't have access to a machining setup, you could probably do it in wood using dowels on both ends. But whatever you do, don't clamp the end-plates and try to twist them off. Take the time to make up something that fits in the four holes and use that.

Once one end is off, the piston comes out. Use a dowel to push it out. Remove the rubber piston rings - they roll out okay. At this point, everything is almost completely disassembled. The only major thing still attached should be one end of the cylinder - the end that did not spin free. My recommendation is just leave it attached. If you try and undo it, its likely that you will deform the cylinder, which kills the accusump.

So, clean everything completely. When re-assembling, lube the rubber piston rings with new engine oil. Reassemble the whole thing, with the piston at the fully discharged position. You won't have any pressure in the tank, so pump up the tank back to where the gauge was reading when it was emptied but not dismantled.

Mine has been working just fine since, and continues to hold pressure over multiple weeks of no operation.

David Borden

17 posts

202 months

Saturday 23rd February 2008
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Are you guys using the automatic valve on these units connected to ignition? Im looking at plumbing one of these on my GTM. I understand the LSx motors have some oiling issues on sustained high G corners and am looking for ways to avoid throwing a rod.

Anyone use one of these on an LSx based Ultima? If so, how did you plumb it?

David


Tonymg

768 posts

196 months

Wednesday 8th February 2017
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Any one done a Strip Down on U-tube of the Accusump a video Clip/pic tells a thousand words me thinks? only an idea?

BogBeast

1,136 posts

262 months

Wednesday 8th February 2017
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Tonymg said:
Any one done a Strip Down on U-tube of the Accusump a video Clip/pic tells a thousand words me thinks? only an idea?
Its really not worth it. Mine was dead easy ONCE I got a decent size of internal circlip pliers.

Don't use the interchangeable tip ones. I got a set of cheapish eBay specials which are kind of OK but are not really big enough so it was a bit of a struggle to get the mechanical advantage to compress the clip. I will invest in a better quality set when I do it again, just confirm the pin hole size on the clip will fit the pliers.

There's basically a big circlip in each end, once you have drained it and got the circlips out its basically a hollow tube to clean.

I have done mine twice now and both times its been as clean as a whistle...

ROWDYRENAULT

1,270 posts

213 months

Saturday 11th February 2017
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" LSX motors have trouble with sustained high G " ...correction All LS motors and every other motor has problems with High G with a wet pump system. Gravity is a bh and when you corner hard enough your going to run the oil away from the pump and then Acusump or not your playing with fire. Dry sump the thing and quit trying to put a band aid on a severed artery. The very best street cars pull 1 g on a circle take a look at the test results in the "funny papers" the Ultima will pull 1.2 something whole different issue. On top of that most of the 1 g cars zo6 Corvette Porsche ect use dry sump out the door. You don't think the factories spend that money for the hell of it

ROWDYRENAULT

1,270 posts

213 months

Saturday 11th February 2017
quotequote all
" LSX motors have trouble with sustained high G " ...correction All LS motors and every other motor has problems with High G with a wet pump system. Gravity is a bh and when you corner hard enough your going to run the oil away from the pump and then Acusump or not your playing with fire. Dry sump the thing and quit trying to put a band aid on a severed artery. The very best street cars pull 1 g on a circle take a look at the test results in the "funny papers" the Ultima will pull 1.2 something whole different issue. On top of that most of the 1 g cars zo6 Corvette Porsche ect use dry sump out the door. You don't think the factories spend that money for the hell of it