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JEL91Westy Samba Member
Joined: December 04, 2020 Posts: 211 Location: Central PA
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Posted: Wed May 05, 2021 5:47 pm Post subject: Rebuild at what level of oil consumption |
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My 1990 Westy runs okay, but has felt down on power lately and is now burning a quart of oil every 500mi. My question is at what point does oil consumption equal rebuild time. _________________ 91 Westy
85 911 |
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DanHoug Samba Member
Joined: December 05, 2016 Posts: 4771 Location: Bemidji, MN
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Posted: Wed May 05, 2021 5:48 pm Post subject: Re: Rebuild at what level of oil consumption |
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as my father would say... "Oil is cheap" _________________ -dan
60% of what you find on the internet is wrong, including this post.
'87 Westy & '89 Westy both 2.1 4spd
Past projects can be found at--
www.thefixitworkshop.com |
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fxr Samba Member
Joined: December 07, 2014 Posts: 2319 Location: Bay area CA
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Posted: Wed May 05, 2021 5:52 pm Post subject: Re: Rebuild at what level of oil consumption |
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I did the Subie swap when I got to 1 qt every 250 miles - basically every gas fill-up. That was about 1000 miles after it went to 1 qt every 500 miles. No drips - all being burnt. _________________ Jim Crowther
1984 1.9l EJ22 Westy Wolfsburg Edition
Vespa GTS 300 |
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Howesight Samba Member
Joined: July 02, 2008 Posts: 3274 Location: Vancouver, B.C.
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Posted: Wed May 05, 2021 6:20 pm Post subject: Re: Rebuild at what level of oil consumption |
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JEL91Westy wrote: |
My 1990 Westy runs okay, but has felt down on power lately and is now burning a quart of oil every 500mi. My question is at what point does oil consumption equal rebuild time. |
Before going whole hog on a rebuild, it might be a good idea to replace your breather tower which acts as the PCV valve in the WBX engine. If you rebuild, you should replace it anyway, so replacing it now as a diagnostic involves no net cost.
Another check you can do is to have a helper drive behind you in a separate vehicle and, while on speaker phone with you, observe for oil smoke. Driving down a steep, longish hill, alternately step on and release the accelerator pedal. With trailing throttle, if oil smoke comes out the tailpipe, then your valve guides are worn and require at least a cylinder head rebuild.
Now try driving up a hill. Drive at a steady pace while your observer observes. Now floor the accelerator. If blue oil smoke comes out the tailpipe, then the piston rings are the problem.
Here's one last-gasp approach if it appears that the rings are the problem:
Add Marvel Mystery Oil to you crankcase oil. A half-quart should work. The idea is to free up sticky oil control rings. This has worked for many. If it does not work for you, at least the innards will be cleaner when you rebuild!
By the way, have you checked compression on this engine? _________________ '86 Syncro Westy SVX |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50336
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Posted: Wed May 05, 2021 7:30 pm Post subject: Re: Rebuild at what level of oil consumption |
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The engine that was in my 83-1/2 $400 wonder when I bought it started out using a quart every 3-500 miles and slowly increased to a quart every 50-100 miles over the next 70,000 miles when the engine died from a freak incident that had nothing to do with the the oil use or much of anything else that could have been foreseen.
My wife followed me many times over the years or I followed her when she had the van and the engine never smoked unless we had been careless and badly overfilled the crankcase. |
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Vanagon Nut Samba Member
Joined: February 08, 2008 Posts: 10367 Location: Sunshine Coast B.C.
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Posted: Wed May 05, 2021 8:08 pm Post subject: Re: Rebuild at what level of oil consumption |
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JEL91Westy wrote: |
My 1990 Westy runs okay, but has felt down on power lately and is now burning a quart of oil every 500mi. My question is at what point does oil consumption equal rebuild time. |
Has a compression and leak down test been done? _________________ 1981 Westy DIY 15º ABA
1988 West DIY 50º ABA
VE7TBN |
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dabaron Samba Member
Joined: June 21, 2018 Posts: 2559 Location: Philly, mang
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Posted: Wed May 05, 2021 8:19 pm Post subject: Re: Rebuild at what level of oil consumption |
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Vanagon Nut wrote: |
Has a compression and leak down test been done? |
x2. and what is your under load at temp oil pressure looking like? _________________ 1991 Vanagon GL Camper
i had no idea i wanted to be a mechanic
"burnin oil and cookin coils" -- Destructo
BiWerks Design, LLC |
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