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Extreme oil loss situation!

 
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Old 03-04-2017, 08:41 PM
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Extreme oil loss situation!

My 98 Honda Prelude SH (140,000 miles) has seen unbelievable loss of oil since I got it in August of last year. At first I was loosing multiple quarts every 500 miles (I know, right?). So In November of last year I took it to a mechanic to check it out and fix it. I was considering replacing the engine, but just decided to see what was going on. He opened the engine up and told me that it was burning oil, and there were leaks. Before I told him to fix it I told him if he was certain this would solve the oil loss situation. He said yes.

He went and replaced cylinder head gasket, rebuild cylinder head (#1 had low compression), replaced crankshaft seal, balance shaft seal, VTEC vlave filter and gasket, and exhaust gasket. And then STILL, there was mass oil consumption. It did not make a significant difference.

Then I brought it back, since it was under warranty. He checked it out again and said he does not believe it is burning any oil, and is coming from rear main seal, oil cooler o-ring, and oil filter housing. so, he went and replaced all of those.

Still.. lots of oil loss. At this point I don't even remember everything he said I just told him if you think it is the problem. He said it something associated with the tech was leaking, so he fixed that.

He kept it and drove it for 500 miles to do a oil loss analysis. Still.. oil loss. He seemed stumped and told me, it might be because I am using synthetic, I told him It was loosing oil when I was using conventional. He told me to put it 10-40 high mileage synthetic and a quart of oil stabilizer and this is where I am at now.

It went through a quart and a half already in less than 700-800 miles. And the place is ignoring my phone calls. I called on a different number, and they pick right up. I gave them 2200 to do all this and I still have a bad oil loss issue.

I guess I will bring it back AGAIN! however, since they are not answering my calls, I need some backup plans since I am starting to doubt them, and want to know what to do if they just say sorry. It is under warranty. are they obligated to fix it? can I get a refund? Do I need to look into legal help if things go badly?

What do you guys think?
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Old 03-04-2017, 09:51 PM
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Re: Extreme oil loss situation!

The ringlands on the pistons are known to wear out on H series motors, nothing short of a new set of pistons and honing the cylinders will solve your issue.

For $2,200 you could have swapped in a low mileage JDM motor, replaced all the seals, timing belt and tensioner.
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Old 03-05-2017, 12:01 AM
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Re: Extreme oil loss situation!

^^ good point, not much help to the OP now though. Unfortunately, if it is the rings then it may be cheaper to get another motor than repair the one you have.

Do you happen to know if the compression came right in cylinder #1 after the head gasket? Has anyone bothered to do a wet compression test and/or a leakdown test? Also, if you are burning that much oil, you would see evidence of it blowing blue smoke out the exhaust or at the very least covering the back of the car in oil spots. If you are leaking that much then there would be noticeable puddles wherever you park.

The synthetic thing can contribute a little. When I swapped to full-synthetic I put in 10W40 (about the same mileage motor as yours) since that was what semi I was using. At the time I was going through about 1L (about a quart) every few months, then all of a sudden I went through the same amount in a weekend. I swapped up to a 10W50 full synthetic (seems heavy but I don't have excessive oil pressure or starting troubles) and got it back under control.
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Old 03-05-2017, 02:56 AM
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Re: Extreme oil loss situation!

bad valve seals cause some oil burning and bad piston rings cause major oil burning

sadly bad piston rings are more expensive to change since you have to get your block honed like ogsmakdade said
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Old 03-05-2017, 03:20 AM
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Re: Extreme oil loss situation!

Lesson learned. Next time it maybe worth to take it to Honda first and have them check out what is going on instead of "professionals". At this point if they really are ignoring you and its still under warranty you may want to contact an attorney and see what they can do.
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Old 03-05-2017, 10:26 AM
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Re: Extreme oil loss situation!

Yeah, I forgot to mention, The mechanic said the piston rings looked fine (maybe he was wrong?). But Yeah, That is the confusing part. IF it was burning that much, then there would be smoke coming out of the exhaust right? There is absolutely no smoke coming out.

I am not sure of the specifics of the compression test. He said Cylinder #1 was a low and now he says compression is "through the roof" on all of them.
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Old 03-05-2017, 04:47 PM
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Re: Extreme oil loss situation!

It might be time to stop laying faith in what this mechanic has said.

As hard as it is to spend good money after bad, getting an independent compression (dry and wet) and a leakdown test, with actual values for results not just "she's all good mate", will give you a better idea of what is going on inside and shouldn't cost that much.
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