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My eu1000 started using oil. The compression seems fine so I took off the valve cover. The valve guides seem worn. How do I get them out so I can replace them?

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We soak the cylinder heads in hot oil for several hours to get the head heated enough to use a a specially designed tool to remove the valve guides. (see below) Even then there is the possibility that some re-surfacing / material build up is required that will result in the valve seat having to be removed also. It will be nearly impossible to remove it in someones garage without runiing the cylinder head and valve seats. Most automotive machine shops will do this for you if you carry it in. I do recommend that if you do take it to a machine shop that you have the valve seats re-ground. We had all of the tools to do this but never removed a valve guide on a cold cylinder head.

Valve guide removal tool:
http://www.speedwaymotors.com/Valve-Guide-Removal-Tool,2629.html

A tool like this one is often required to remove valve guides:
http://cgi.ebay.com/ebaymotors/GO-KART-BARSTOOL-RACING-ENGINE-VALVE-GUIDE-PULLER-KIT-/250507189301?pt=Race_Car_Parts&hash=item3a53645c35


See the link below (although link is related to a full size engine, the process is the same):
http://www.ehow.com/list_6610338_valve-guide-removal-tools.html

All I will say is one wrong step and you can easily have the need for a good machine shop or a new head.

Thanks for choosing FixYa.

Kelly

Posted on Oct 07, 2010

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Toyota paseo engine ticking


Lifter may be worn or cam lobe is worn and is probably due a timing belt replacement as well.Sounds like just a high mileage problem lots of people complain of valve train noise from these engines its not uncommon. I would use a high mileage engine oil to help with the noise but i am afraid the noise is only going to get worse over time you may look into salvage engine with a warranty or having the engine rebuilt it sounds like it is already burning oil. The valve lash can be adjusted on this engine but if your not a mechanic i do not recommend this, it is very sensitive procedure and can damage the engine permanently. Take it to a shop have them check your valve lash and adjust it for the noise issue to save yourself some time and money on a very costly repair with improperly adjusted valve lash. Remember to rate my solution Thanks in advance.

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Was the plug fouled again after you made repairs? Did you install a new plug and run it? If the plug itself is fouling you probably also see blue smoke in the exhaust pipe. Get the engine warm, check compression and do what is called a cylinder leakage test, it puts a volume of air into each cylinder with the valves closed and how much air leaks out determines the over all health of the engine. Does the engine have excess oil consumption? The oil entering the cylinder and fouling the plug can enter from a worn valve guide or guide seal, a worn or damaged oil control piston ring or a worn or damaged piston bore or piston, none of which are going to be inexpensive to fix.

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You are likely correct in the valve guide thing...A little known fact about chevy smallblock engines is that when first introduced as the 265, the cam profile was different than the later versions (283 and up) Because of the different profiles in the later engines, the valve stem gets shoved against the guide as it goes up and down, causing it to wear. If the problem was a bit worse, likely they would have changed the position of the rockers but it wasn't so they didn't.
The stem seals are a simple "o" ring. Replacing them if the guides are worn is useless. (if they were a better design though likely the guides would wear faster so they are actually good in that respect)
What you need to do is to remove the heads and have the guides replaced. BUT, I'd first remove the valve covers and make sure the oil returns at the ends of the oil galleys in the heads aren't blocked with gunk. If they are, oil will pool up inside and run down the guides. In most cases, if they are blocked, simply clearing them will get your oil consumption back to within the "normal" range.

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Why would my 96 honda civic be burning oil


Is it burning it or leaking it? If it is burning it then it could be caused from worn out valve seals or valve guides or worn out or cracked piston rings. The engine will have to be torn down to fix a problem like this. You may try using a product like motor honey or lucal oil stabalizer to help slow down the oil burning. There is no easy fix for a problem like this unfortunately

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Low compression in a 1999 sunfire. will not start, does fire


There can be several causes for low compression.
Chck the obvious first. the spark plugs must be checked that they are all in good condition. not burnt, the gap must be good( for your engine).Check the wires and coil so that good spark is obtained. Blue spark , not weak yellow spark. After everything is good. Check the cylinders to see if they have compression. To test the cylinders do the procedures shown below.

If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

compression test will help you determine if the oil is getting past the valve guides or the rings. If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

finally if the rings on one or more of the pistons can caus compression leak. It must be located and fixed.

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