Rear crankcase vent tube - Team Camaro Tech
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post #1 of 8 (permalink) Old Jan 1st, 17, 06:40 AM Thread Starter
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Jonathan
 
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Rear crankcase vent tube

Just finished rebuilding my 327 engine. I am looking for the bolt that holds the crankcase vent elbow pipe in the 1 1/4" hole at the rear of the block, near the distributor. I uploaded a generic picture of one. The one I have has a large circle bracket on it that I presume the spark plug wires route through it for management.

I ran the motor outside of the car and the motor sounded great. It gets hot after about 20 minutes and have to shut down. I have verified thermostat and burped the system. I was running straight water outside the car. It has a new water pump to. I suspect since I did not have PCV and vent system fully connected this may be part of the issue or I at least hope so. I don't have any smoke out the exhaust or water in oil or vice versa.

Thanks in advance. I am new to the site, but while rebuilding my 327 and found many great topics that helped me along the way.

Last edited by Red6a1; Jul 28th, 17 at 03:39 AM.
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post #2 of 8 (permalink) Old Jan 1st, 17, 07:24 AM Thread Starter
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Jonathan
 
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Re: Rear crankcase vent tube

Not sure if the local hardware sells it or not. Looking for the size of the bolt. The other end of the tube bolts to the intake bolt. I may just have to buy the bolt set from a classic parts store.
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post #3 of 8 (permalink) Old Jan 1st, 17, 05:58 PM
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Re: Rear crankcase vent tube

I doubt that the missing tube is contributing to your overheating issues. If it were mine I would plug that hole with a freeze plug and install a real PCV system that uses a PCV valve in one valve cover and tube in the other that goes to your air cleaner.


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post #4 of 8 (permalink) Old Jan 1st, 17, 11:44 PM
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David Pozzi
 
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Re: Rear crankcase vent tube

I think it's just a 1/4" coarse thread bolt. Don't know the length. The vent connects to the air cleaner so it's not a bad setup and there's an oil separator inside the valley, where on a valve cover, there isn't much oil separating going on. First gen's had a P.C.V valve screwed into the oil fill tube.

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post #5 of 8 (permalink) Old Jan 2nd, 17, 04:45 AM
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Re: Rear crankcase vent tube

take a piece of wire and to measure the depth of the hole plus the height of the tube and that will give you the bolt length
(1/4-20)
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post #6 of 8 (permalink) Old Jan 2nd, 17, 05:50 AM
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Re: Rear crankcase vent tube

1/4-28 UNF 3.5 inches
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post #7 of 8 (permalink) Old Jan 2nd, 17, 04:50 PM Thread Starter
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Jonathan
 
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Re: Rear crankcase vent tube

Thanks. 1/4" x 4 1/2" did the trick. I have the PCV on the front engine oil fill tube. I also have the oil separator installed in the valley.
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post #8 of 8 (permalink) Old Jan 2nd, 17, 05:06 PM
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Glad it worked out
Sorry being off an inch
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