Why is their vacuum coming from the breather tube

Asked by Mar 23, 2015 at 09:50 PM about the 1978 Chevrolet C/K 10 Custom

Question type: Maintenance & Repair

The heat riser is working.Its a 350
create engine .Vacuum is very hard
coming in through the valve cover
breather tube .the PVC is working fine.
Its a four carb.with a edlebrock

8 Answers


The tube the pcv is hooked too?

Pvc left valve cover breather tube right valve cover


The tube for the pcv has vacuum or the other one has vacuum?

The breather tube connecTed to the right valve cover has vacuum and the Pvc connected to the carb hasvacuum seems like oil is sucking codown from the breather side of valvecover


Is the vacuum on the breaker coming from the valve cover or from where the tube is connected? And where do you have it connected?


If it's coming from the valve cover the pcv may be stuck open. I've never seen it produce much even in that case but that's the only thing I can think of. The breather tube should be hooked to the air cleaner. There is no vacuum there unless you have a restriction

Pvc is new and your right there should be no vacuum coming from the breather tube I'm thinking maybe intake gasket or the intake itself


So the vacuum is coming from the engine? Where is your breather hooked to?

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

C/K 10

Looking for a Used C/K 10 in your area?

CarGurus has 287 nationwide C/K 10 listings and the tools to find you a great deal.


Search Chevrolet C/K 10 Questions

Chevrolet C/K 10 Experts

#1 CaptPKelly
Reputation 590
#2 Rowefast
Reputation 360
#3 John Carson
John Carson
Reputation 300
View All

Related Models For Sale

Used Ford F-150
2,264 Great Deals out of 209,447 listings starting at $1,499
Used Chevrolet Camaro
150 Great Deals out of 32,742 listings starting at $1,729
Used Ford F-100
169 listings
Used Ford Mustang
397 Great Deals out of 47,365 listings starting at $1,999
Used Chevrolet Corvette
98 Great Deals out of 20,444 listings starting at $3,495
Used Chevrolet Blazer
1,152 listings starting at $700
Used Chevrolet Impala
542 Great Deals out of 29,827 listings starting at $799