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ftp2leta Samba Member
Joined: October 11, 2004 Posts: 3271 Location: Montreal
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Posted: Tue Dec 15, 2009 6:42 pm Post subject: Coolant pressure test... video. |
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Hey, wile trying to find an odd cooling problem today i thought i should film everything. The van came in and the owner told me it was overheating, strangely and that this was intermittent, he also told me that he loose coolant in the EX tank and he as mostly no heat in the front.... OK.
Head gasket/head crack, maybe, maybe not.
Have fun:
Link
Ben _________________ Working with rust, grease, dirt and dust is a sad truth.
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FI part for sale: http://www.benplace.com/parts_sale1.htm
My site: http://www.benplace.com/vw2.htm
Subi conversion: http://www.benplace.com/vanaru_eng.htm
Youtube http://www.youtube.com/user/ftp2leta |
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tangstadt Samba Member
Joined: December 07, 2008 Posts: 90 Location: Atlanta, GA
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Posted: Tue Dec 15, 2009 7:27 pm Post subject: |
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Merci beacoup pour le video! Tu est tres gentile a donne les temps pour nous amateurs. |
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kshbaja Samba Member
Joined: June 15, 2008 Posts: 476 Location: Portland, OR
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Posted: Tue Dec 15, 2009 7:53 pm Post subject: |
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That's great Ben. Thanks! I am very curious what the final fix will be. _________________ 1986 Westfalia |
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ftp2leta Samba Member
Joined: October 11, 2004 Posts: 3271 Location: Montreal
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Posted: Tue Dec 15, 2009 8:58 pm Post subject: |
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kshbaja wrote: |
That's great Ben. Thanks! I am very curious what the final fix will be. |
Later tonight i went back to the shop with some new test i had in my head, i found coolant in #3, plug was wet like hell. A leak down resulted in a climb of 8 psi in the coolant pressure tester.
Do you get that? Injecting compress air into the suspicious cylinder wile the coolant system was pump to 10 psi made the coolant tester gauge climb to 18 PSI, even more.
Reverse situation...
I'm perplex about those test, i can't inject air into the cylinder (lost of pressure on the coolant pressure test #1) but i can do the opposite, of course the leak down as more pressure than the coolant tester pump.
So yes, what we have here is a deteriorated head gasket.
Ben _________________ Working with rust, grease, dirt and dust is a sad truth.
------------------------------------------------------
FI part for sale: http://www.benplace.com/parts_sale1.htm
My site: http://www.benplace.com/vw2.htm
Subi conversion: http://www.benplace.com/vanaru_eng.htm
Youtube http://www.youtube.com/user/ftp2leta |
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vanagonforever Samba Member
Joined: July 29, 2007 Posts: 211 Location: Baltimore, MD
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Posted: Wed Dec 16, 2009 6:58 am Post subject: |
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This is some really great stuff. I love being able to see your process and what tests you run. I'm eager to see the outcome. _________________ 1986 2WD 2.1L WBX Vanagon Weekender
1983.5 1.9L WBX Vanagon Westfalia |
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ftp2leta Samba Member
Joined: October 11, 2004 Posts: 3271 Location: Montreal
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Posted: Wed Dec 16, 2009 8:10 am Post subject: |
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vanagonforever wrote: |
This is some really great stuff. I love being able to see your process and what tests you run. I'm eager to see the outcome. |
This is nothing else than plumbing, some cheap tools (not even 125$) and common sense. I see so many post about overheating but i rarely see van that really overheat. Even if the vanagon as a surprising amount of coolant, hoses and tubing, it's not the space shuttle.
It can be confusing at time but with the right hinking and some basic tools problems can be easily found and fix.
Of course this van had a 2 yo rad, that is didn't tell.
It as been running now (this morning) for 55 minutes, same result as yesterday. So I'm done with this one, if the problem come back it's a head job.
Ben _________________ Working with rust, grease, dirt and dust is a sad truth.
------------------------------------------------------
FI part for sale: http://www.benplace.com/parts_sale1.htm
My site: http://www.benplace.com/vw2.htm
Subi conversion: http://www.benplace.com/vanaru_eng.htm
Youtube http://www.youtube.com/user/ftp2leta |
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tencentlife Samba Member
Joined: May 02, 2006 Posts: 10077 Location: Abiquiu, NM, USA
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Posted: Wed Dec 16, 2009 11:23 am Post subject: |
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Quote: |
I'm perplex about those test, i can't inject air into the cylinder (lost of pressure on the coolant pressure test #1) but i can do the opposite, of course the leak down as more pressure than the coolant tester pump. |
Well you have a much higher pressure in the cyl, that's one thing, but also from the cyl you're pushing air thru the leak (very low viscosity) , while on the cooling sys side you're trying to push water thru the leak (very high viscosity), and at a fraction of the pressure as well.
That's why combustion seal leaks so often don't show up with a simple coolant pressure test, but doing the CO sniff in the pressure tank while running is such a relaible way to prove such leaks. Not having a CO sniffer, though, I actually like the test you did, pressurising the cyl with the coolant tester still hooked up. I'll use that someday.
Hope you were making money doing something else during that hour the thing was being tested! _________________ Shop for unique Vanagon accessories at the Vanistan shop:
https://intrepidoverland.com/vanistan/
Please don't PM here, I will not reply.
Experience is kryptonite to doctrine. |
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blueridgedog Samba Member
Joined: December 05, 2009 Posts: 21 Location: Virginia
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Posted: Wed Dec 16, 2009 4:41 pm Post subject: |
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Great work!
I would love to see a video of a system bleed. _________________ 85 Wolfsburg Weekender
In process of getting on the road |
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ftp2leta Samba Member
Joined: October 11, 2004 Posts: 3271 Location: Montreal
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