Last post on Dec 20, 2001 at 6:21 AM
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#261 of 280 Air in Oilpump
Nov 18, 2001 (6:15 pm)
It's pretty much been researched by at least 20+ people I know who specialize in old subies. Very common problem. The air-temp/humidity can cause the seal to expand or contract, thus allowing air to be sucked in sometimes and not at others. Also thicker oil will be less likely to allow air seepage.
I like my XT6 better than some of the new ones. It has more low-end torque than the WRX
Nov 19, 2001 (12:30 pm)
You need to take a deep breath and relax, you can be very sure that they did check for warped heads and engine block as well.
This is standard practice in an engine rebuild, SOA.are paying for this repair and you can be sure it will be done properly first time around, they are not going to the trouble of rebuilding an engine to have it blow up in a short time again.
If there is the least suspicion that the heads are warped, they will either be resurfaced or replaced, the usual course is to replace the heads as resurfacing can alter the compression ratio,
Nov 19, 2001 (2:40 pm)
I suspect that they did, just didn't see it on the invoice.
I have often wanted to get the head (and the spare head) on the old OHV 6 Stude resurfaced and magnafluxed, but haven't had the inclination, much less the desire to heave that old cast iron lunker into the back of the Forester.
I think I'm just gonna take some time over the holiday to fling the Subie around some PA country backroads to get that old feeling back again - it'll be good for the car and my peace of mind.
Nov 19, 2001 (2:41 pm)
I still don't see what air temperature and humidity have to do with an oil pump submerged in hot oil. Seals are either good or they aren't. Well, I don't have 20 specialists (are there 20 people in the world who work only on Subarus?), but I will consult my one expert (His name is Jim Askim but we call him Saint James, for the miracles he performs) and see what other comments he might have on this clattery valve phenomenon, okay?
Nov 20, 2001 (6:35 am)
no problem. My valve tap comes and goes on my XT6, no rhyme or reason so the air-sucking problem is viable IMHO. Cause if the pump was bad, my engine would have blown about 30K miles ago (and those are very hard 30K miles, 20-30 auto-xs etc) Thicker oil helps also to eliviate the problem, which makes sense cause air-bubbles will less likely form in a thicker oil than a thin one.
Nov 20, 2001 (9:03 am)
Yes, but thicker oil will allow the oil pump to pump more oil up there. The problem, as I see it, is internal wear in the pump...the clearances are too large and thicker oil helps fill that up somewhat. What I'm curious about is whether the clatter is caused by an actual drop in oil pressure or by cavitation of the oil (foaming) from the large clearances.
Well, it's interesting to speculate. If you ever do take the pump out, it would be good to measure the clearances and see if they are out of factory spec. Whether by wear or by bad seal, replacing your pump will cure the problem.
Nov 20, 2001 (9:06 am)
Oil Pressure never drops, so that isn't the issue. Luckily the XT6 has a real pressure guage which is nice.
Nov 21, 2001 (3:09 pm)
Go for it, you need to reinforce the satisfaction thar you had with the forester before the problem crept up, and I don,t know of any better way than to just get in and go for a good satisfying drive.
I know how you feel about throwing a big old junky cylinder head into your nice car, I feel the same way about mine.
#269 of 280 Help...90 Legacy run rough and stall at idle
Nov 30, 2001 (5:39 am)
My 90 Legacy would start up fine. However, when the engine is at idle speed, it would run really rough and stall. If you give it gas and keep the engine reving above 1000RPM, it seem to run fine.
So far, the car got new air filter, fuel filter, pvc valve, spark plugs and wires. All these didn't seem to help.
Anyone have this problem before?
I manage to find the green service connectors under the dash. After plugin them together, the "Check engine light" give the 3 flash when the car is running. I got no idea how to decode this. Any help is appreciated.