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Re: Exhaust coming out of breather at idle?!?
[Re: ademon]
#972023
04/12/11 03:30 PM
04/12/11 03:30 PM
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Joined: Jan 2003
Posts: 74,942
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,942
U.S.S.A.
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Quote:
my worn 383 does that, ring seal
Yep , it's blowby , do a leakdown test .
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Re: Exhaust coming out of breather at idle?!?
[Re: JohnRR]
#972024
04/12/11 03:48 PM
04/12/11 03:48 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
OP
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Berwyn, IL
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Quote:
Quote:
my worn 383 does that, ring seal
Yep , it's blowby , do a leakdown test .
Thanks for the replies, how do I do a leakdown test? 
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Re: Exhaust coming out of breather at idle?!?
[Re: 340SHORTY]
#972027
04/12/11 04:01 PM
04/12/11 04:01 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
do all the tests you want,,, bottom line is your engine needs to be rebuilt... 
I fully agree.
If you have a large amount of fumes coming out of the breather and the PCV isn't handling it there is only one cure. Ring job time. It could also be a hole in a piston piston or scored cylinder wall so there is no longer a ring seal. There is no short cut cure. Tear down time.
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Re: Exhaust coming out of breather at idle?!?
[Re: MoparforLife]
#972028
04/12/11 04:35 PM
04/12/11 04:35 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
Banned. Forever.
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Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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Could be a head gasket too. Had the same problem on my Fury after I did the magnum head swap. I got a bad MP gasket....so bad it would blow the dipstick out of the tube at anything over 1,500rpm. Switched to Fel-pro and it runs like a top
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: Exhaust coming out of breather at idle?!?
[Re: SomeCarGuy]
#972031
04/12/11 05:12 PM
04/12/11 05:12 PM
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Joined: Feb 2003
Posts: 10,198
Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
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Posts: 10,198
Someplace you aren't
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Oh and I've put about a zillion miles on 440's that had all kinds of blow by coming out of the breather. Oil turned black after 500 miles. Big deal. Unless you are planning a long trip I wouldn't be overly concerned about it. Some guys want stuff to be perfect, but I have learned over the years that as little as some of these cars get used, it just doesn't make sense to spend a bunch of money sometimes.
I want my fair share
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Re: Exhaust coming out of breather at idle?!?
[Re: SomeCarGuy]
#972033
04/12/11 05:34 PM
04/12/11 05:34 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
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Quote:
Oh and I've put about a zillion miles on 440's that had all kinds of blow by coming out of the breather. Oil turned black after 500 miles. Big deal. Unless you are planning a long trip I wouldn't be overly concerned about it. Some guys want stuff to be perfect, but I have learned over the years that as little as some of these cars get used, it just doesn't make sense to spend a bunch of money sometimes.
I agree but I would at least like to confirm the problem, problem is I don't know what I am doing, lol. Pretty much everything I do other than basic maintenance is the first time for me, so this forum is a huge help.  Oh and it doesn't smoke out the exhaust.
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Re: Exhaust coming out of breather at idle?!?
[Re: 69L78Nova]
#972034
04/12/11 05:46 PM
04/12/11 05:46 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
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Quote:
Could be a head gasket too. Had the same problem on my Fury after I did the magnum head swap. I got a bad MP gasket....so bad it would blow the dipstick out of the tube at anything over 1,500rpm. Switched to Fel-pro and it runs like a top
 I did have a loose headbolt (copletely loose)when I checked while replacing valve cover gasket, wonder if that caused a head gasket problem 
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Re: Exhaust coming out of breather at idle?!?
[Re: challenger70]
#972035
04/12/11 05:59 PM
04/12/11 05:59 PM
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Joined: Apr 2010
Posts: 4,154
bethlehem pa
mikemee1331
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Joined: Apr 2010
Posts: 4,154
bethlehem pa
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Quote:
Quote:
Could be a head gasket too. Had the same problem on my Fury after I did the magnum head swap. I got a bad MP gasket....so bad it would blow the dipstick out of the tube at anything over 1,500rpm. Switched to Fel-pro and it runs like a top
I did have a loose headbolt (copletely loose)when I checked while replacing valve cover gasket, wonder if that caused a head gasket problem
ummm, that would be a problem! when you discovered that did you check the torque on the others? you really should buy or rent the tester and check out your motor. i'm not real big on over-thinking or over spending this stuff but a loose cyl. head bolt could give you real problems.
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Re: Exhaust coming out of breather at idle?!?
[Re: mikemee1331]
#972036
04/12/11 06:44 PM
04/12/11 06:44 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
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Berwyn, IL
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Quote:
Quote:
Quote:
Could be a head gasket too. Had the same problem on my Fury after I did the magnum head swap. I got a bad MP gasket....so bad it would blow the dipstick out of the tube at anything over 1,500rpm. Switched to Fel-pro and it runs like a top
I did have a loose headbolt (copletely loose)when I checked while replacing valve cover gasket, wonder if that caused a head gasket problem
ummm, that would be a problem! when you discovered that did you check the torque on the others? you really should buy or rent the tester and check out your motor. i'm not real big on over-thinking or over spending this stuff but a loose cyl. head bolt could give you real problems.
I retorqued all the bolts when I found the loose 1, it was the only loose one on both sides.
I think I will get a compression tester and leakdown tester, unless a leakdown tester can test compression also? What are good brands, I don't need pro-grade, but don't want to buy junk, seems I can get Matco leakdown for about $130, and a sun compression tester for about $30??
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Re: Exhaust coming out of breather at idle?!?
[Re: Challenger 1]
#972041
04/12/11 10:12 PM
04/12/11 10:12 PM
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Joined: Jan 2005
Posts: 3,344
Central TX
roe
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Posts: 3,344
Central TX
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Just curious, and thinking out loud here because Im still learning, but if its a small amount of fumes, could it be from the fuel tank venting system. On a stock system the breather is hooked up to the air cleaner, so any fumes etc...would be pulled back into the engine and never noticed right? But if hes running one of the breathers that basically looks like a filter, then the fumes/exhaust is only being noticed because its not being sucked back into the air cleaner? Just a thought roe
1971 Plymouth Satellite
408/904 8 3/4 3.23 SG
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Re: Exhaust coming out of breather at idle?!?
[Re: GTXX]
#972043
04/13/11 12:31 AM
04/13/11 12:31 AM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
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Berwyn, IL
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Quote:
have you confirmed that the PCV is working properly by taking the valve out of the valve cover while it's running? It should have a very strong vacuum when placing your thumb over the open end of the valve.
no, I assume you mean leave the hose on the valve and put my thumb over the part that would normally be in the valve cover? I have not tried that but it's practically brand new(not guranteeing it works, I know) I will try that when I get a chance.
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Re: Exhaust coming out of breather at idle?!?
[Re: Challenger 1]
#972044
04/13/11 12:33 AM
04/13/11 12:33 AM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
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Quote:
Are you sure you got the exhaust hooked up right? 
 I sure hope so 
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Re: Exhaust coming out of breather at idle?!?
[Re: challenger70]
#972045
04/13/11 07:39 AM
04/13/11 07:39 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
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Posts: 21,345
Marysville, O-H-I-O
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what cam is in the motor? if it's got low vacuum at idle, as most performance cams do, then it might not be enough to suck open the PCV valve. most of those valves are designed to be a "controlled vacuum leak" they have a spring in them that will close the valve under low vacuum conditions, i.e. WOT, so that you don't lean the motor out when you need it the most. so, verify that the PCV is actually open at idle. Every engine has SOME blow-by on the rings. fact of life. if the PCV is closed at idle, then it has nowhere to go and it WILL vent out the breather on the other side. you might not have any problem at all! (but my money is on rings!  ) a good leakdown tester can be put together prety cheap. harbor freight has them for like, $30. total junk. you need 2 gauges that read on the same scale, and the harbor frieght ones do not. simple solution. buy a HF unit, and 2 compression testers at the parts store. swap the 2 gauges over to the leakdown tester, and now you have one with 2 gauges that read the same scale. then you can snag one off and put it back on the comp tester when you want to find your cranking PSI.
**Photobucket sucks**
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IMO even on a trip you can buy a lot of oil for what it will cost to overhaul. If it isn't smoking out the pipes you will be the only one that notices it. There can be quite a bit of breather fumes and still not even use much oil. Drive it. 
