well I left my car sit for 4 months while I was away working ,and when I came back the mileage dropped from 25 mpg or so to close to 18 . I decided to check the compression of the cylinders ,and they all came out around 145 psi . I added 2 caps fulls of oil and it they went to 200 psi ,so my question is could it be stuck rings ? as I've heard seafoam can be used to unstick them if thats the problem.
You put the oil in the gas? 2 cap fulls coulldn't be 1 ounce and would do nothing for the crankcase. 4 months old gas? I would sea foam or put a octane booster or Lucas or something. Change your oil if it is a year old or due. Don't overfill.
You put the oil in the gas? 2 cap fulls coulldn't be 1 ounce and would do nothing for the crankcase. 4 months old gas? I would sea foam or put a octane booster or Lucas or something. Change your oil if it is a year old or due. Don't overfill.
no I took the plugs out since I was checking compressing and put 2 caps of oil in each cylinder (about 2 tea spoons of oil in each cylinder) ,as I heard it was a test to see if it might be the rings that stuck. the guy I talked to said if the compression went back to normal it could mean the rings are stuck and need to be unstuck or replaced. I don't know if it's true or not but I tried it and the compressing in each went from 142 - 195 psi ,so I'm hoping it's the rings and not piston or cylinder damage. I just wanted to know if putting a cap or two of oil in a cylinder and having compressing go up was a good test for stuck rings. I don't want to speed money buying seafoam if the oil test thing means nothing ,as money don't grow on trees ;-) Oh and I'd ask the guy but he's not an expert or anything ,so I figured I'd ask the question here
change the oil to 10w-40, add 1/2 can seafoam, idle it for about 15 minutes, then drive it a couple of miles hard. on and off the gas, full throttle then coast, full throttle then coast, hang around in 2nd gear and run it hard.
come back, drain oil, pour through a quart of 5w-30 to push any crud left on the bottom of the pan out, refill with oil of your choice, then recheck compression. we did this with a ford escort that used to be the GF's and it brought the compression from 180, 180, 90, 110 back upto 180, 180, 175, 180.
Well I never heard of that oil trick. Might need to clean things up a bit. I think the sea foam in the brake booster will help to clean things up. If you are concerned about the cost, sea foam is sold under another name but I forget what it is. If you do it, pull your plugs out and clean them a few days after because they may have chared oil and ash on them. The sea foam in the oil is good too but plain ole tranny fluid ~1 quart added to the oil (don't overfill) and driven like mentioned earlier or just as usual but about 20-50 miles at operating temp will do wonders to pull the crap out if it is stuck on. But as you must already know, if you have some sludge issues from neglect, then any chemical added will start yanking large chunks of things away from places they might need to be and could clog your oil pickup tube. Don't Sea Foam the crankcase without changing the oil within 100 miles afterward!
trans fluid works also, but is a much slower cleaner and also alot gentler. thats why i suggested a heavier weight oil to help combat the affects of the solvent thinning the oil and wiping the bearings.
Well I never heard of that oil trick. Might need to clean things up a bit. I think the sea foam in the brake booster will help to clean things up. If you are concerned about the cost, sea foam is sold under another name but I forget what it is. If you do it, pull your plugs out and clean them a few days after because they may have chared oil and ash on them. The sea foam in the oil is good too but plain ole tranny fluid ~1 quart added to the oil (don't overfill) and driven like mentioned earlier or just as usual but about 20-50 miles at operating temp will do wonders to pull the crap out if it is stuck on. But as you must already know, if you have some sludge issues from neglect, then any chemical added will start yanking large chunks of things away from places they might need to be and could clog your oil pickup tube. Don't Sea Foam the crankcase without changing the oil within 100 miles afterward!
He pretty much hit it.
__________________ Corolla Number TWO OLD: Corolla 1- 96 4AFE, AE101 w/ 225k Miles orig. motor, 129k trans. - TOTALED. NEW: Corolla 2- 96 4AFE, AE101 w/ 161k Miles on motor and trans.
forget the compression test and do a leakdown test. THEN you will know exactly how much leakage you have in each cylinder and where it leaks. The tesers are very cheap at Harbor Freight.
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