How To Replace Valve Seals On Your Engine




What do you think about this video?

Todd Morrill: I went with compressor pressure hose directly to the cylinder, might want to put a couple of squirts of oil into the cylinder first to lessen air loss past the rings.

Jason Fisher: I am going to be doing this on a 1991 S-10 with a 4.3. I have one question and that is... How much air pressure do I apply inside the cylinder? 

Kevin S: not bad....my recommendation....clean the head and a little more lighting....nice job though.

678friedbed: Thanks for the video you have one of the more informational videos on here about this. Is that an FE head?

samsnoodle: Thanking you for your knowledge and instruction, gonna give it a go on my car soon. Very natural video :)

Dallas Sutton: You left the installation tool on the guide before you put spring back on.

Edgars Baumanis: ha ha ha

Ninz306: Great work!

Alanna Vang: hi is there a certain pattern of doing this?

Debbie Norman: Do you have a video other than this one that would help...or give step by step directions...

MrShriepshroepshrap: hello,when do you need to replace your seal,what dos the car?when you now you must replace your seals? greetz end how you now witch seal is bad ? greetz

Todd Morrill: I might try removing the engine mount on that side and lower the engine to get enough room to use a valve spring compressor

Todd Morrill: nah, ya take off the seal guide and then install the spring, retainer and keepers back on. Use it over on all the other valves, I might have slipped it off right after the installation of the seal otherwise I couldn't have installed the keepers.

Todd Morrill: Not if done correctly but on some engines you may have to remove the heads to replace valve springs or seals, depends on your make - model - engine. There is more than one way to skin a cat...I've heard about threading a rope in through the spark plug hole to hold the valve in place while removing the spring or seal assembly. I'd be afraid of the rope tangling and then I couldn't remove it. The demonstration was for a push rod engine, you might need a different method for your engine.

Paul Mall: Wouldn't you wan't the piston at bottom not top dead center. if the piston is at top dead center when you hook up the air it will be forced to the bottom spinning the engine over and if you have the timing belt off you could actually crash valves

iz954: The best valve seal video. Look no further. Thanks guy. You just made my life easier.

SACTOWN OG: Dude, Knowledge is power, and money saving. thank you for the refresher course.

rhino986: Im doing this to 92 Voyager.. I failed Emissions High hydrocarbons up in the 1800 range I am thinking its the valve stem seals but not sure.

Debbie Norman: We have a 1976 ford f100 390 engine...the valve spring is broke on the passenger side by firewall...an air conditioner box is in the way...any suggestions on how to replace the spring without removing the head? THERE IS NO ROOM TO WORK!?

scitzz: Are you supposed to leave the installation tool that you used to guide the new valve on like that?

ragweed123: You made thats so much harder on yourself... It's called a socket and a rubber mallet

Lalo Herrera: you could damage our valves doing that buddy

Todd Morrill: could be oil going past the piston rings, do a compression test dry and wet to see if there is a change in psi, you shouldn't have more than 20% difference and I prefer to see less than 10% difference. If you have spark plugs getting fuel fouled you will need a carb rebuild/replced. Make sure you have the right spark plugs for your year/model/engine and the gap is set right. If it is only 1 cylinder with problems then it's probably not a carb issue. You could have mechanical problems.

laurajdahl: If I replace the valve seals in my 76 cj7 with 258 engine... Will the spark plugs stop getting oily wet residue? OR could the problem be the carb floods and cause the spark plugs to get oily wet ? Thanks for the video! :)

Burr Street: what state r u in?

Carl Williams: Great video! So, he forgot to remove the tool. It is a demonstration. You can use clothesline to hold up the valves. It's safer than air. Leave some hanging out. Get the piston on TDC. Otherwise, he's right.

Todd Morrill: you can remove the valve cover, which you must have already done to see which one is broken...taking apart would be the easy part. Big block FE fords have a rocker shaft that runs length of the head. Remove that, you could put air in the cylinder to hold the valves up. Tap on the valve spring retainer and and the keepers should release. The spring is broken and should come apart pretty easily, installing the new spring will be the challenge, have to find a way to compress the new spring.

Todd Morrill: if it's an overhead cam engine (timing belt) you would have already removed the rockers to gain access to the valve and maybe even removed the camshaft. At this point your valves are at the fully seated position, no chance of hitting a piston. Bottom dead center is ok but if you lose air pressure for any reason the valve is taking a trip into the cylinder, then you will have to remove the cylinder head.

worthypoo: Just start and end with TDC.

worthypoo: I would rotate the crank for each sets of valves, one/two piston(s) at a time, so the piston is at the top. That way if pressure is lost the valve doesn't fall. A valve resting on the piston won't harm anything. A valve falling inside means changing head gasket. Only issue is knowing which piston is up. Look down the sparkplug hole for that. Nice video.

Rating:
How to replace valve seals on your engine 4.6 out of 5

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How to replace valve seals on your engine