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> my oil/ engine problems diagnosis ?, updated, Just did compression test today 3/17/09
jsayre914
post Mar 3 2009, 04:52 PM
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take a look guys, by the way I did get her home the other night, and i beat the snow.


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jsayre914
post Mar 3 2009, 04:54 PM
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jsayre914
post Mar 3 2009, 04:56 PM
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jsayre914
post Mar 3 2009, 04:57 PM
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jsayre914
post Mar 3 2009, 04:58 PM
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Zach said he would loan me a compression tester, i guess that is my next step.

thanks for looking

joseph
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yeahmag
post Mar 3 2009, 06:51 PM
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Been a while since I had FI on the car. Could you tell if it was coming from one of the breather tubes for the heads? Any smoke out of the tail pipe while running? I can't imagine anything other than excessive blow by causing that - which the compression test should show you.
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Jake Raby
post Mar 3 2009, 06:54 PM
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Tons of blow by... Either the rings are shot or the exhaust valve guides are shot, or both..
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type47
post Mar 3 2009, 07:09 PM
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Good thing a response I made didn't get posted..... I questioned the compression test.... My lack of skilz...

I would like to know about the "blow by" you (especially Jake) mention. What is it exactly and would it cause that much oil mess? (Just asking for my education).
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yeahmag
post Mar 3 2009, 07:21 PM
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When combustion gases go flying past the rings they can only escape through the PCV and the head vents. The gases pick up oil and oil vapor(s) along the way giving you a nasty mess (as witnessed above).
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Jake Raby
post Mar 3 2009, 07:28 PM
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Bad rings can create blowby as they allow gases to fill the crankcase, forcing an oily mess from every orfice...

The same thing happens with bad exhaust valve guides as the exhaust gases pass between the stem of the valve and the valve guide, pressurizing the rocker box and then the crankcase..
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Dr Evil
post Mar 3 2009, 07:54 PM
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So, when are we going to rebuild your engine (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/idea.gif)
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wertygrog
post Mar 3 2009, 08:06 PM
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My engine does the same thing when a hose falls off the head breathers or any other part of the pcv system. Check all your hoses and connections...sometimes they crack or loosen up down by the cylinder head.
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VaccaRabite
post Mar 3 2009, 08:10 PM
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Hey Joe,

I'm not in class this week. Next week I have Monday off, but it gets insane again for me right after that. If it is sucky outside, we can warm up your engine by running it in the garage with a hose hooked up to the exhaust pipe. If your valves have not been done in a while, I'll bring feeler gauges too.

If it comes to it that you need to rebuild, all my resources are at your disposal. If you get good numbers, we can look and see if there is something else funky.

I won't lie. I want to help you rebuild your engine. I've got all this crap now, and I want to use it.

Zach
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championgt1
post Mar 3 2009, 08:15 PM
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How did your engine run before this mess? The stacked vacuum elbow being disconnected would have been a MAJOR vaccum leak. Is this your oil leak problem. No.
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jsayre914
post Mar 3 2009, 09:22 PM
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QUOTE(yeahmag @ Mar 3 2009, 07:51 PM) *

Could you tell if it was coming from one of the breather tubes for the heads?


the hose it is comming from goes into the threeway split thing front left side of the engine, from there i would guess it is coming from the head.
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Any smoke out of the tail pipe while running?


yes, espically from hard throtle when i let go of the pedal.
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jsayre914
post Mar 3 2009, 09:24 PM
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QUOTE(Jake Raby @ Mar 3 2009, 08:28 PM) *

Bad rings can create blowby as they allow gases to fill the crankcase, forcing an oily mess from every orfice...

The same thing happens with bad exhaust valve guides as the exhaust gases pass between the stem of the valve and the valve guide, pressurizing the rocker box and then the crankcase..


(IMG:style_emoticons/default/idea.gif) so does the engine still gotta come out if it is the valve guides?
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jsayre914
post Mar 3 2009, 09:28 PM
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QUOTE(championgt1 @ Mar 3 2009, 09:15 PM) *

How did your engine run before this mess? The stacked vacuum elbow being disconnected would have been a MAJOR vaccum leak. Is this your oil leak problem. No.

the car ran absolutly great, even with the smoke... it is/ was fast. i used a piece of silicon inside the double stack, but im not so sure it was perfectly tight, and from what im learning there is quite a bit of pressure in my case.
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r_towle
post Mar 3 2009, 09:33 PM
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QUOTE(jsayre914 @ Mar 3 2009, 10:24 PM) *

QUOTE(Jake Raby @ Mar 3 2009, 08:28 PM) *

Bad rings can create blowby as they allow gases to fill the crankcase, forcing an oily mess from every orfice...

The same thing happens with bad exhaust valve guides as the exhaust gases pass between the stem of the valve and the valve guide, pressurizing the rocker box and then the crankcase..


(IMG:style_emoticons/default/idea.gif) so does the engine still gotta come out if it is the valve guides?


Yup and it takes less than a hour to get it out.

Rich
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jsayre914
post Mar 3 2009, 09:33 PM
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anyone know where this came from??


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r_towle
post Mar 3 2009, 09:34 PM
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QUOTE(jsayre914 @ Mar 3 2009, 10:28 PM) *

QUOTE(championgt1 @ Mar 3 2009, 09:15 PM) *

How did your engine run before this mess? The stacked vacuum elbow being disconnected would have been a MAJOR vaccum leak. Is this your oil leak problem. No.

the car ran absolutly great, even with the smoke... it is/ was fast. i used a piece of silicon inside the double stack, but im not so sure it was perfectly tight, and from what im learning there is quite a bit of pressure in my case.

From what I have experienced with lots of motors, not just type 4, is if you get smoke on the highway when you let off the gas pedal, its rings.

Rich
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