Mechanics

TOYOTA RAV4 TOOL PROBLEM

1997 Toyota Rav4 • 140,329 miles

A follow up to my question on oil level.
i was asked by Roy if there were any leaks. I replied there was no oil leak, but I didn't get an answer.
I changed the oil moments ago. The quantity of oil that came out of the block wasn't as bad as I thought. In my previous post, I said the dipstick wasn't registering anything until I added about 1/2 to 3/4 of quart of oil. I checked the level when the engine was cold this morning. When doing the oil change moments ago, about 2.7 quarts came out of the block. Assuming I added 1/2 quart this morning, then over 2 quarts came out of the block. When I did the oil change a 1040 miles ago, I poured 3.9 quarts of oil, and that was immediately after replacing oil pan gasket. So after doing oil change today, some oil will remain inside the pan. Therefore the oil used up ( or unaccounted for) is roughly one quart after 1040 miles. 1 quart is a bit excessive.

I appreciate your inputs.
thanks. George.
Avatar
RAV4X4
February 10, 2013.



Hi

a quart every 900 is industry average. Try change weight of the oil to 10-40 and see if the consumption lessens

Roy

ASEMaster6371
Feb 10, 2013.
1qt/900 miles is sort of ridiculous. My previous car, Honda civic with 316000 miles when we parted ways, didn't consume a lot of oil. In fact, I never had to add oil between oil changes on the Honda. I was reading a thread on a forum about oil consumption. Someone suggested ( to the person having oil consumption issue) to use AutoRX. Another sugested Kreen, BG 109, Chemtool B12, MMO works. Yet another guy suggested Marvel Mystery Oil.
Have you had any experience with these solvents? Does any of them fix oil cunsumption?
Thank you. George.

Tiny
RAV4X4
Feb 10, 2013.
If you have an oil consumption problem, whatever oil you put in is not going to help. You are not addressing the source and putting in something to cover it up is going to produce other side effects later on.

Either you live with it or you have the problem rectified, which is mostly due to worn valve seals.

KHLow2008
Feb 11, 2013.
Thank you for your advice KHLow2008.

Tiny
RAV4X4
Feb 11, 2013.
You wrote the oil consumption is mostly due to worn valve seals. Are those valve guide seals or valve stem seals?
Where should I look or what test(s) do I perform to zero-in on the problem? The other day while idling, I noticed droplets of water or watery substance from the tail pipe. Will the spark plugs indicate anything about oil consumption and the source of the consumption? Thanks for your help.

Tiny
RAV4X4
Feb 11, 2013.
Both should be the same if I am correct about what you are refering to.

Usually the exhaust would tend to blow some grey smoke.

For oil leaks from the inlet valves into cylinders, the spark plugs would have signs of carbon deposit.

For exhaust valve seals, the exhaust would tend to smoke, especially a few minutes after the engine is started. The exhaust needs to heat up bfore residue oil in the exhaust system starts producing smoke.

KHLow2008
Feb 11, 2013.
Thank you.
I read a couple of posts on a toyota forum, where guys said they replaced the valve seals on their cars without removing the head: they set the 1st cylinder at TDC, and removed plugs, valve cover, etc. They emphasized to make sure a valve (?) Does not drop into the cylinder. I'm contemplating doing this project. I took auto mechanic courses, but I've never done anything like that in school. If you can advise on this project, give me key points to watch out for, and essential tools! And how much time it takes.
Thanks.
P.S. If your instructions are clear for me to take up this project, I will make a donation. You can also email me, and send as an attachment if necessary. Email: write2georgio@gmail. Com

Tiny
RAV4X4
Feb 11, 2013.
You would need tools to compress and remove the valve springs and collets. Such tools should be available from tools suppliers and you can check out if any shops that loan out tools have them. A valve seal removing tool would be required too.

I used regulated compressed air pumped in from spark plug hole to keep the valves from falling but in this case the piston would be at BDC.

Time would depend on how fast you work.

If you know how to remove valve springs, it should not be a problem for you to handle this job.

KHLow2008
Feb 12, 2013.
I spoke with one of my former auto mechanic teacher, who mentioned to me that there was a class being offered this summer that allows a student to work on project. I'm going to find out if I'm qualified to take the course. I prefer to do the valve seals job at school rather than at home: 1) I take too much time when I work on my truck at home. 2) the school has garages and tools. I don't want to be in a situation where I take part of the engine apart and unexpectedly get stuck.

Is this job started with a specific cylinder? Is it done one cylinder at a time? Please give me a refresher lecture: how to put the piston at BDC ( it's been a while since I opened an auo mechanic book!).

Thank you again.

Tiny
RAV4X4
Feb 12, 2013.
Yes the work should be done with availability of tools and equipment.
At TDC for cylinder 1 means 2 and 3 are at BDC. Turning 2 or 3 to TDC woud get 1 and 4 to BDC.

The cylinders would automatically be turned to BDC when compressed air is applied to the cylinder.

Cylinders are done one at a time and in pairs as per the piston location.

KHLow2008
Feb 14, 2013.
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