Keep blowing front intake seal
Thread Starter
Instructor
Joined: Oct 2007
Posts: 183
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From: Philmont NY
Just found that out bud.... We were thinking it was like earlier 327s with the vent tube in the block. I believe we now have it 68 was vented from both valve covers one to the air cleaner and one to the front port of the carb....correct?
Thread Starter
Instructor
Joined: Oct 2007
Posts: 183
Likes: 1
From: Philmont NY
PCV throwing off timing?
I hate to keep this going but.....
As stated earlier I kept blowing the seal...before that seal blew out I could get the timing down right on the mark. Then when it blew it would throw it off. So I fix the problem with the seal...PCV in filler tube and breather installed on passenger side valve cover. I cant get the timing line down to where it needs to be. Why would this effect it ? I put it where it sounds the best run it and it is all fine. I shut it down and it will not start when warm. Any suggestions.... I thought that maybe the rubber bushing on the harmonic balancer has moved and can not get the timing to specs, but want to be sure that I am not missing something simple.
As stated earlier I kept blowing the seal...before that seal blew out I could get the timing down right on the mark. Then when it blew it would throw it off. So I fix the problem with the seal...PCV in filler tube and breather installed on passenger side valve cover. I cant get the timing line down to where it needs to be. Why would this effect it ? I put it where it sounds the best run it and it is all fine. I shut it down and it will not start when warm. Any suggestions.... I thought that maybe the rubber bushing on the harmonic balancer has moved and can not get the timing to specs, but want to be sure that I am not missing something simple.
Race Director
Joined: Mar 2006
Posts: 14,112
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From: Florida
If you think the pcv hookup is causing your problem, try temporarily plugging the pcv line to the carb and see if it cures it.
Then check the carb base gasket for leaks with starter fluid or propane. You may have the wrong gasket there for the old intake.
More likely since you put on an old aftermarket intake with an oil fill tube, you may have used an incorrect intake gasket set and have an internal air leak. It is a common mistake.
If all else fails, remove the intake again and match the ports on the intake and also on the block to the gasket set.
Then check the carb base gasket for leaks with starter fluid or propane. You may have the wrong gasket there for the old intake.
More likely since you put on an old aftermarket intake with an oil fill tube, you may have used an incorrect intake gasket set and have an internal air leak. It is a common mistake.
If all else fails, remove the intake again and match the ports on the intake and also on the block to the gasket set.
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Joined: May 2006
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From: Dayton, Ohio
Do you have the thin steel plate under the carb?
Are you disconnecting the vacuum to the dist. when setting the timing?
Have you checked the mechanical advance in the dist. to see its not sticking?
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Joined: Nov 2002
Posts: 12,142
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From: Taylor Michigan
You have a few alternatives. Put breathers in the valve covers. Also on the end rails of the block 3M weather stripping cement placed on a clean site and allowed to set up will hold nearly anything from moving and cure the front seal from blowing out. This actually could be caused by setting the intake back on the block. Using the 3M sealer {yellow or black} cures this from happening. The gasket can not move accidentally.
Works great on valve cover gaskets too.
Works great on valve cover gaskets too.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 183
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From: Philmont NY
I checked intake gaskets..they line up to both intake and heads.
No mechanical advance in distributor?...switched over to electronic?
Vacuum is pluged at the carb...
And the carb was in three sections top / middle / and a bottm plate about a half an inch thick....is that the thin plate you are talking about?
I will try disconecting the pcv and blocking the port, but that is how the gasket blew in the first place.....maybe it wont with the breather on the valve cover now.
No mechanical advance in distributor?...switched over to electronic?
Vacuum is pluged at the carb...
And the carb was in three sections top / middle / and a bottm plate about a half an inch thick....is that the thin plate you are talking about?
I will try disconecting the pcv and blocking the port, but that is how the gasket blew in the first place.....maybe it wont with the breather on the valve cover now.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
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Race Director
Joined: May 2006
Posts: 16,528
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From: Dayton, Ohio
In this link is a pic of the gasket and the baffle or plate
http://www.ecklers.com/product.asp?p...7&dept_id=1269
http://www.ecklers.com/product.asp?p...7&dept_id=1269
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Here are the two items you need.The order is manifold,gasket,metal plate,carb.Lars has a 3 part gasket set that he uses.
http://www.volvette.com/FU145L.html
http://www.volvette.com/FU145C.html
http://www.volvette.com/FU145L.html
http://www.volvette.com/FU145C.html
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
I checked intake gaskets..they line up to both intake and heads.
No mechanical advance in distributor?...switched over to electronic?
Vacuum is pluged at the carb...
And the carb was in three sections top / middle / and a bottm plate about a half an inch thick....is that the thin plate you are talking about?
I will try disconecting the pcv and blocking the port, but that is how the gasket blew in the first place.....maybe it wont with the breather on the valve cover now.
No mechanical advance in distributor?...switched over to electronic?
Vacuum is pluged at the carb...
And the carb was in three sections top / middle / and a bottm plate about a half an inch thick....is that the thin plate you are talking about?
I will try disconecting the pcv and blocking the port, but that is how the gasket blew in the first place.....maybe it wont with the breather on the valve cover now.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 183
Likes: 1
From: Philmont NY
