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Cleaning sludge from coolant resevoir


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He did that already. He just did a HG job.

 

 

When you shake, shake, shake don't forget about the pinhole in the tank.

 

Letting it set in the laundry tub full with cleaner helps. I usually do it with the gravel in there and shake it every so often for a day or so.

 

I pull the overflow when I send the rad out to be flushed on HG jobs. I also try and keep a few already cleaned ones around. Currently I have 3 in the laundry tub. Shook them this morning when doing laundry.

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[...] I pull the overflow when I send the rad out to be flushed on HG jobs. [...]

A good point -- if the coolant reservoir has a lot of sludge, the rest of the cooling system might also, and need some attention.

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Sorry for not clarifying, Dave is correct, I am just wrapping up a HG job. The resevoir is actually a good progressive indicator (for me at least) of oil buildup in the coolant and probable HG failure so I want it as clean as possible. I believe I changed out every seal and gasket I had access to. Drained the coolant completely. Very last thing before final coolant fill to radiator is to clean this tank. Then fill crankcase with oil, connect battery & hopefully it will work.

 

14 years with no sludge isn't that unusual for a Sub. Well actually now thinking about it, I heard the problem is with mainly 96-2006 and more so the phase 1-most problematic, then phase 2's. 14 years would mean you have 94 which was before that generation of HG's. Consider yourself lucky.

 

Thanks for the responses.

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It's a 1995 2.2 l. The 2.5 looks like it was a market-driven redesign.

 

I have only driven the 2.5L and test drove a WRX SXT which really moved, but too pricey and too much to insure. The one thing I like about the 2.5L is the it has decent acceleration and not too bad on gas mileage. Are all the 2.2L's SOHC's?

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Are all the 2.2L's SOHC's?

Yes, unless there were DOHC versions in Japan, but probably there weren't. They did produce 2.0 engines with DOHC heads.

Edited by avk
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Update:

 

Got the resevoir cleaned before engine install yesterday by using mineral spirits, clean 5/8" gravel, shook it up, drained out and flushed with hot water. Then used a bunch of fast orange as this stuff works the best as a grease cutter. Shook with gravel & hot water, drained, then used paper towels to clean out residual sludge on inside walls with a long screwdriver, worked good.

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