DIY Valve Seat Vacuum Tester - Cheap!
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- čas přidán 28. 07. 2022
- This R107 Video: DIY Valve Seat Vacuum Tester - Cheap!
I am documenting every part of this vehicle as I put it back together. The idea is to end up with the best documented 560SL rebuilds on the Internet.
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In this video I describe a valve seat vacuum tester tool that I made including all the necessary port fittings and gauges for under US$60. Then I am going to use this tool and test the valve seats on a cylinder head before I lap them to get a baseline.
There are plenty of videos that are similar to this, but I have a surprise. In this video I will do a valve seat vacuum test without valve seals or springs. In fact, no assembly is required to vacuum test your valves. I have not seen this done before, but I'm sure it has because it is so darn simple.
Links to any special tools used in this video is also below.
In this video I mention another video I happened to find titled "Leak Down Testing My Cylinder Heads On A Bench? PORSCHE 912 Engine Build Part 4". I thought this was a great video and a great resource. Here is a direct link to the video:
• Leak Down Testing My C...
I want everyone who visits my channel to know about a friend of mine name Tasos. His videos inspire me to be more like him. The man is amazing I feel. There is NO way I would be this far without his help. You can find his CZcams channel at:
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My videos are not sponsored by anyone. The products and tools I use are products and tools I have purchased with my own money. I include links below to any special tools or products used in this video.
I bought the Harbor Freight vacuum pump. All you need is an air compressor and you are good to go:
www.harborfreight.com/air-vac...
These are the necessary plugs and tubing needed to vacuum test your valve seats without installing your seals or springs. I bought the 40 Pc 1/16" to 3/4" High Temp Silicone Rubber Tapered Plug Kit. I like it:
amzn.to/3cQz3y3
You then need this tubing for the valves. Latex Rubber Tubing Tube 5/16" (8mm) ID x 1/2" (12mm) OD:
amzn.to/3OKEID5
Parts used to create the suction cups and hoses. All of this is cheaper at my local hardware store (Home Depot, Lowes, Ace). I included links here for those that don't have the luxury of a hardware store close by.
You only need a 4x4, but this is a 6 x 6 x 1/4 Inch Aluminum Sheet:
amzn.to/3Q5rula
You can purchase a cheaper one, but this is the one I bought. This is the MEASUREMAN 2-1/2" dial, 1/4"NPT Lower, Glycerin Filled, Stainless Steel case, Brass Inside:
amzn.to/3Q8AiqF
These are the foam pads I bought. 4" X 4" X 1/4" Adhesive Foam Pad:
amzn.to/3zHtCKE
You only need one. Brass Pipe Fitting, SUNGATOR Bar stock Tee, 1/4" x 1/4" x 1/4" NPT Female Pipe (2-Pack):
amzn.to/3Q0Ja1t
You need two. 1/4" Heavy Duty Air Compressor Brass Ball Valve:
amzn.to/3oD0uxJ
I bought a 4 pack. 1/4" Hose Barb to 1/8 NPT Male Brass:
amzn.to/3oH4VrA
1/4-Inch Clear Vinyl Tubing. This is much cheaper at your local hardware:
amzn.to/3oFGYkk
This video is very detailed and is intended for the absolute beginner (ME). This is how I did things. If you see a problem, let me and the world know by leaving a comment.
Disclosure: I have never pulled an engine before and I have never rebuilt one either. This video series is documenting an inexperienced old guy tore apart his 1987 560SL.
I will be doing a Facebook Live (or CZcams live) when I start this car for the very first time since 2008. Make sure you get notified when I publish a new video so you don't miss this special event. - Auta a dopravní prostředky
To Add, ....The Vacuum Leak test Should be performed With just the Dry valve Without any Spring.....Oil or grease on the valve Guide or Stem is Ok......
That’s pretty much how I did it. No spring or valve stem seal was used.
Great
Good informative video.....Any Pump vacuum over 20" is good & actual Valve vacuum should Equal Plugged Test vacuum.....The Real valve job Leak Quality test is the vacuum Leak-up Time.....A near Perfect 0.0005" valve Seat Run--Out leaks about 10 seconds per 1" or 100 seconds per 10" of Leakage.....Various Increasing Seat Run-out (0.001, 0.002, 0.003" etc) will Leak-up at Incrementally Quicker times....Your video's Leak-up Time is Way too Quick & That valve job is Leaking way More than a Typical 0.002" valve Seat Run-out does...
Thanks for the info, but it’s a bit late and I don’t understand what you’re saying. I’ve never heard of a leak-up test although according to you I did it and it was too quick. I’ve heard of a leak-down, but not leak-up? Also note that I did not do a valve job. Yes I replaced 1/2 the valves, but I did no machine work at all. The seats and guides were within tolerance so I left them alone. The machine work by a 40 year veteran was performed on the right cylinder head only and it was absolutely horrible (see The Incompetent Machinist video). I’m just a guy who has never rebuilt an engine before. Stick around and see if this engine starts.
I forgot to mention that the cylinder head I tested here has not been touch. To see how well this cylinder head performs using this tester after lapping the valves, see my video titled “Lapping Valves and Vacuum Test: czcams.com/video/2S8I5tb0TGE/video.html
If you keep saying " I don't know..." ... you shouldn't be making a video
“I don’t know” what to say 😊