high oil pressure, blowing oil out dip stick tube.

Jake66 · Post by **Jake66** » Tue Jul 29, 2014 11:19 am

my 360 is blowing oil out of my dipstick tube. i have two oil breather caps that connect to a tee and go to the back of my carb. yet she still blows oil. what configurations do you guys use and have you ever had to deal with this same issue? its not continuous, just once i get cruising at high way speeds

nytemuvr · Post by **nytemuvr** » Tue Jul 29, 2014 4:45 pm

PVC on one valve cover to carb, breather on the other valve cover without vacuum, open. Not saying that's your problem, is it like puking out oil or just dribbling down the tube?

gww · Post by **gww** » Wed Jul 30, 2014 3:35 am

are you able to do a compression test?

Jake66 · Post by **Jake66** » Wed Jul 30, 2014 9:51 am

i havent done a compression test yet, but its like its just spraying out. it will get up to the cap on the tube and then spray out almost like a spray bottle. i just did an oil change and put in a higher quality oil so ill see what happens. im also picking up a new pcv valve. ive got plenty of breather caps laying around from trying to fix the issue. like 5 or 6.

it blew smoke for a little out the driver side exhaust but i ran marvel mystery oil through it and did the oil change and it stopped. any ideas are welcome. thanks guys

nytemuvr · Post by **nytemuvr** » Wed Jul 30, 2014 1:00 pm

Jake66 wrote:i havent done a compression test yet, but its like its just spraying out. it will get up to the cap on the tube and then spray out almost like a spray bottle. i just did an oil change and put in a higher quality oil so ill see what happens. im also picking up a new pcv valve. ive got plenty of breather caps laying around from trying to fix the issue. like 5 or 6.

:thinking it blew smoke for a little out the driver side exhaust but i ran marvel mystery oil through it and did the oil change and it stopped. any ideas are welcome. thanks guys :salut

No need to get a new PVC valve, soak it with solvent so the check ball inside moves and just soak your breather also. It sounds more than just that, a compression check will give a more definitive answer. A leak down test would be better.

Jake66 · Post by **Jake66** » Wed Jul 30, 2014 1:56 pm

how do i do a leak down test? thats a new one for me.

Post by **Hobcobble** » Wed Jul 30, 2014 2:38 pm

Jake66 wrote:how do i do a leak down test? thats a new one for me.

Step One: Drink lots of water....

Try this:
http://www.carcraft.com/techarticles/11 ... wn_tester/
John

Jake66 · Post by **Jake66** » Wed Jul 30, 2014 3:38 pm

hahaha thanks john, ive figured out a similar way to do it with a compression tester. i rotate the fan to bring up pressure as i bring the piston up to top dead center then hold it to see if it bleeds out. is that basically the same thing?

Jake66 · Post by **Jake66** » Wed Jul 30, 2014 3:40 pm

nytemuvr wrote:
Jake66 wrote:i havent done a compression test yet, but its like its just spraying out. it will get up to the cap on the tube and then spray out almost like a spray bottle. i just did an oil change and put in a higher quality oil so ill see what happens. im also picking up a new pcv valve. ive got plenty of breather caps laying around from trying to fix the issue. like 5 or 6.

it blew smoke for a little out the driver side exhaust but i ran marvel mystery oil through it and did the oil change and it stopped. any ideas are welcome. thanks guys
No need to get a new PVC valve, soak it with solvent so the check ball inside moves and just soak your breather also. It sounds more than just that, a compression check will give a more definitive answer. A leak down test would be better.

what do i soak the oil breather valve with? whats your recommendation?

nytemuvr · Post by **nytemuvr** » Wed Jul 30, 2014 3:45 pm

Jake66 wrote:
nytemuvr wrote:
Jake66 wrote:i havent done a compression test yet, but its like its just spraying out. it will get up to the cap on the tube and then spray out almost like a spray bottle. i just did an oil change and put in a higher quality oil so ill see what happens. im also picking up a new pcv valve. ive got plenty of breather caps laying around from trying to fix the issue. like 5 or 6.

:thinking it blew smoke for a little out the driver side exhaust but i ran marvel mystery oil through it and did the oil change and it stopped. any ideas are welcome. thanks guys :salut
No need to get a new PVC valve, soak it with solvent so the check ball inside moves and just soak your breather also. It sounds more than just that, a compression check will give a more definitive answer. A leak down test would be better.

what do i soak the oil breather valve with? whats your recommendation?

Aerosol brake cleaner, acetone, or go old school and use gas.

nytemuvr · Post by **nytemuvr** » Wed Jul 30, 2014 3:55 pm

Jake66 wrote:hahaha thanks john, ive figured out a similar way to do it with a compression tester. i rotate the fan to bring up pressure as i bring the piston up to top dead center then hold it to see if it bleeds out. is that basically the same thing?

Basically, sorta....You'll probably will be able to get a good idea what's going on with just a compression test....do it when it's up to operating temperature.

Jake66 · Post by **Jake66** » Wed Jul 30, 2014 4:03 pm

nytemuvr wrote:
Jake66 wrote:hahaha thanks john, ive figured out a similar way to do it with a compression tester. i rotate the fan to bring up pressure as i bring the piston up to top dead center then hold it to see if it bleeds out. is that basically the same thing?

Basically, sorta....You'll probably will be able to get a good idea what's going on with just a compression test....do it when it's up to operating temperature.[/quote/]

so once i get it back tonight ill pull a plug at a time and do the check. would i soak the breather valves even if they are pretty fresh?

Post by **Hobcobble** » Wed Jul 30, 2014 6:39 pm

Jake66 wrote:what do i soak the oil breather valve with? whats your recommendation?

You could use kerosene.
John

nytemuvr · Post by **nytemuvr** » Wed Jul 30, 2014 9:34 pm

If they're new and clean, you're good. White or blue-tinted smoke from the exhaust?

Jake66 · Post by **Jake66** » Wed Jul 30, 2014 10:29 pm

Its super faint. I cant see it during the day I have to use a light at night to see it. Its almost like its running rich. When it smoked before I did an oil change it was blowing white

Jake66 · Post by **Jake66** » Thu Jul 31, 2014 11:42 am

so i did a compression test on all the cylinders while the motor was hot. all cylinders held and i had very little leak down.

gww · Post by **gww** » Thu Jul 31, 2014 12:15 pm

what were each cly readings? wet or dry?

Jake66 · Post by **Jake66** » Thu Jul 31, 2014 12:57 pm

dry? wet? i got 167-170. my motor is also out of a 78 motor home if that helps diagnose the issue.

Jake66 · Post by **Jake66** » Thu Jul 31, 2014 12:59 pm

i took my readings with the engine off. all i did was crank the fan over till i hit bottom on the cylinder then i brought the cylinder up for the compression stroke to test pressure and bleed off.

kurt · Post by **kurt** » Thu Jul 31, 2014 2:16 pm

What kind of compression gauge did you use. 167 seems high for just cranking it from BDC to TDC by hand. Normally you use the starter with the carb wide open and bump the needle a few times (dry). Then you add a few squirts of oil to the cyl (wet) and do it again. If that reading is much higher that means your rings are bad. If it stays the same but is low its valves. If it's the same and good there is no issue.

Also compression gauges have one way Schrader valves. How did you do the leak down.

Kurt

Sweptline.ORG

high oil pressure, blowing oil out dip stick tube.

high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.

Re: high oil pressure, blowing oil out dip stick tube.