Welcome to the CJ-3B Bulletin Board, the discussion forums section of the website CJ3B.info. Everyone is invited to view the postings here, but you must register as a member in order to post messages. The moderator reserves the right to remove items posted. Items may be archived in the Tech Tips section of the website. If you post a tech problem, please follow up by posting the solution when it is found, as it may be useful to other readers. For forums covering other Jeep models, see the bottom of this page.
Search for keywords or phrases anywhere in the CJ-3B Bulletin Board using Google. Enter key words here.
| You're currently viewing the forums as a guest. This means there are some features you can't use. If you register, you'll be able to post messages and use member-only features such as customizing your profile and sending personal messages. Registration is simple and free. Join the CJ-3B Bulletin Board! If you're already a member please log in to your account to access all of our features: |
- Pages:
- 1
- 2
| PCV ? | |
|---|---|
| Tweet Topic Started: Dec 15 2012, 10:52 PM (1,404 Views) | |
| div4gold | Dec 15 2012, 10:52 PM Post #1 |
|
Member
![]() ![]()
|
I just took a 50 mile drive in the '64 3B. When I got home I checked the oil and the filler tube had a huge amount of foamy water/oil mix in it. I'm thinking the crankcase ventilation system isn't working right. Can anyone tell me something about this? |
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| Rus Curtis | Dec 15 2012, 11:31 PM Post #2 |
|
Member
![]() ![]()
|
div, I had this condensation early on too. Check here for PCV details: http://z4.invisionfree.com/CJ3B_Bulletin_B...?showtopic=2458 |
|
Rus Curtis Alabama '54 CJ-3B "Green Gruntt" Bantam T3-C | |
![]() |
|
| div4gold | Dec 15 2012, 11:45 PM Post #3 |
|
Member
![]() ![]()
|
Mine has a PCV valve on the side valve cover that runs to the intake manifold. The top valve cover doesn't have any fittings for any hoses either. It also has a hose from the oil filler tube to the air cleaner. I haven't been losing any coolant from the radiator. I do live in a high humidity place if that would make a difference.Or maybe the PCV valve isn't working properly , do they plug up ? |
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| Rus Curtis | Dec 16 2012, 09:20 AM Post #4 |
|
Member
![]() ![]()
|
div, There are 3 different top valve covers, that I know of. Which one you have will determine the PCV tube/hose configuration you'll end up with. Without the top fitting, if you have a hose running from the Oil Filler Tube to the Air Breather you should be okay there. Yes, the PCV valve does get clogged over time. If it's an original type you can disassemble and clean. If it's a modern style valve (I ran one like this for years until the internet was invented where I could locate the correct one) then replace it if you can't hear it rattle when shaken (at least that's what I did). Humidity is the biggest contributor (engine heat naturally draws this out of the air) and if you have anything loose (hose, Oil Dipstick gasket, PCV fittings) where its not snug then moisture can get in and this milky sludge is the result. Most of the time (not always) a leaky coolant system creates green droplets on the dipstick (and in some cases white billowing smoke out the tailpipe). In my case, I had slack in the gasket on the Dipstick cap. I doubled the gasket so I had a seal when I tightened it (I did only this as I believe in doing one thing to eliminate vs. multiple repairs at once as this can fix the problem but not alert you to what caused it). As strange as it seems, a couple of days later the sludge was completely gone. All systems must be tight and secure. Fuel, coolant, lubricants. The crankcase ventilation system is no different. |
|
Rus Curtis Alabama '54 CJ-3B "Green Gruntt" Bantam T3-C | |
![]() |
|
| div4gold | Dec 16 2012, 01:22 PM Post #5 |
|
Member
![]() ![]()
|
The PO rebuilt the engine about 6k miles ago. The PCV valve looks like it's not original and is still shinny like new, so I'm guessing the PO replaced that with the rebuild. The oil filler tube seats down real tight and all of the vacuum lines are tight. Maybe I just worry to much but I didn't like the looks of all that white foamy mix in the filler tube. The oil in the pan doesn't appear to be water contaminated. |
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| oldtime | Dec 16 2012, 02:57 PM Post #6 |
![]()
MODERATOR
![]() ![]()
|
If sloshing through creeks then know that excess water will enter via the Donaldson filter. Check the Donaldson for water ! |
|
Currently building my final F-134 powered 3B . Rock Crawler using factory parts from the Willys Motors era (1953-1963) http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new | |
![]() |
|
| div4gold | Dec 16 2012, 04:17 PM Post #7 |
|
Member
![]() ![]()
|
Although the roads are wet I haven't made and creek crossing. I still haven't got a manual for this yet so you are going to have to tell me what a Donaldson filter is
|
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| oldtime | Dec 16 2012, 04:36 PM Post #8 |
![]()
MODERATOR
![]() ![]()
|
The standard oil bath air filter used on all Hurricane powered CJ's. |
|
Currently building my final F-134 powered 3B . Rock Crawler using factory parts from the Willys Motors era (1953-1963) http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new | |
![]() |
|
| div4gold | Dec 16 2012, 04:51 PM Post #9 |
|
Member
![]() ![]()
|
The oil bath air cleaner has a name, I didn't know that. Donaldson must have designed that system,eh? I haven't had that apart yet either, I was planning on taking that off and servicing it and giving it a new coat of paint. I didn't want to wreck the decal on top of it so I haven't done anything to it yet. |
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| John J | Dec 17 2012, 11:23 AM Post #10 |
|
Member
![]() ![]()
|
If you are loosing coolant, and its not on the ground (either when the engine is running, or when parked), that foaming may indicate an internal loss of coolant, such as the head gasket may be starting to leak. John J 1958 CJ3B |
![]() |
|
| Rus Curtis | Dec 17 2012, 12:11 PM Post #11 |
|
Member
![]() ![]()
|
div, Okay, you've got a valve but haven't serviced it yet? Maybe time to remove and check. The simple fact is all combustion engines produce this blow-by pressure. If it has no where to go, gaskets will fail. Early engines had a draft tube. This closed system with a PCV valve is an upgrade. If your valve is clogged or inoperable, then that pressure (and moisture) must go somewhere even if it travels up-stream in the opposite direction - up the Oil Filler Tube towards the Air Breather. It is possible this is the cause of your sludge (I'm like you, I don't want that stuff either). I've always included air filter and PCV as well as all fluids etc with every oil change. Good habit pattern. Your Service Manual, SM-1046 (covers late 3B, CJ-5/6,5A/6A etc) states every 2,000 Miles (which is the same for the engine oil): Section B, Lubrication Tables and Para. C-6. Service Crankcase Ventilating System.
Speaking of the Donaldson Oil Bath Air Breather, that decal is available from several vendors: http://walcks4wd.com/catalogsearch/result/?q=decal Plus, servicing this is simple but if you're going to repaint it, a new decal will look good! Let us know how your status changes as you check through this. |
|
Rus Curtis Alabama '54 CJ-3B "Green Gruntt" Bantam T3-C | |
![]() |
|
| div4gold | Dec 17 2012, 12:14 PM Post #12 |
|
Member
![]() ![]()
|
I'm not losing any coolant anywhere. I also just thought about how hot the engine was running. I don't even know if it has a thermostat in it . The temperature gauge is the kind that is in the speedometer cluster. It is graduated into 'cold', then a center mark, and then 'hot'. It never gets to more than half way to the center mark, like a 1/4 reading on the gauge. I'm going to pull it today and see what's in there. I'm thinking it doesn't get hot enough to evaporate out the moisture. I may be wrong but that's what I'm thinking now. |
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| jeeper50 | Dec 17 2012, 04:13 PM Post #13 |
|
ol' skool jeeper jeff
![]() ![]()
|
My guess is it's from condensation and short trips in the jeep not letting the engine stay at operating temp long enough to dry it out. I've had the same problem too. Can you post a pic of the drivers side of you engine at the side cover and also a pic of your oil fill tube, Careful when you loosen and remove the pan on your air cleaner, if your hood rain gutter is not doing what it is supposed to do it lets rain drip off the cowl and into your air cleaner and it causes it to overflow and make a mess. Oil floats on water. That can cause extra moisture to be sucked into the engine. |
|
In the land of the blind... the one eyed man is king Texan at heart, Georgian by paycheck '53 CJ3B, F134, 12v alternator, lockrights, Hot-Spark electronic module,11"self energizing brakes, Belleview winch, Beachwood summertop, OD color, built to honor all Veterans of this great country Kayaks- Hobie Revo 13, Hobie Outback 12' both ready for the salt... | |
![]() |
|
| div4gold | Dec 17 2012, 09:38 PM Post #14 |
|
Member
![]() ![]()
|
I replaced the thermostat today and serviced the air cleaner. The air cleaner didn't have any water in it, just some old gunk in the settling bowl at the bottom. The thermostat did get the engine a little bit higher temp. I'll get some pic's tomorrow. I'm now thinking you may be right on the condensation , before , a couple of times, when I checked the oil it had some of the foamy crap on the dip stick. The last time when it had a whole bunch of foam it was raining hard and the humidity was 100%. The oil in the crankcase is still clear. Oh yeah, I took the PVC valve off from the side valve cover and cleaned it out, It appeared to be new and the spring valve in it worked freely. |
Old retired fart living in Ione, WA. I have a 1964 CJ3B. Recently overhauled original motor, transmission and overdrive. 11" Bronco drum brakes on all 4. Needs a new coat of paint but that will have to wait till next summer, it's next summer and I'm working on that now UPS & FEDEX will continue to profit
| |
![]() |
|
| Rus Curtis | Dec 18 2012, 09:05 AM Post #15 |
|
Member
![]() ![]()
|
div, I would think that if working, the ventilation system should handle moisture build-up. I can't dispute that high humidity won't make the situation worse but I still wonder if something needs attention. It sounds like you're working through all your components nicely and getting everything up to specs. Have you checked to ensure the crankcase ventilation lines (includes the hose to the breather) are free of obstruction and that the valve is not backwards? |
|
Rus Curtis Alabama '54 CJ-3B "Green Gruntt" Bantam T3-C | |
![]() |
|
| Go to Next Page | |
| « Previous Topic · CJ-3B Posts · Next Topic » |
- Pages:
- 1
- 2



![]](http://z4.ifrm.com/static/1/pip_r.png)
UPS & FEDEX will continue to profit




3:46 AM Jul 11