Re: How to block off heat riser ports
[Re: Neil]
#214786
02/23/09 10:24 AM
02/23/09 10:24 AM
|
Joined: Mar 2003
Posts: 15,491 the boonies
aarcuda
OP
I Live Here
|
OP
I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
|
Quote:
Here is the pic of a 350 olds head my brother filled with the zinc alloy. This is right after it was done and the excess zinc still needs to be blended back to match the rest of the bowl shape with a porting bit.
This is probably the best way to do this job as it makes the exhaust flow better thru those two ports. If I had the heads off and more time/foresight, i would have rather done it this way.
|
|
|
Re: How to block off heat riser ports
[Re: aarcuda]
#2157981
09/20/16 10:07 AM
09/20/16 10:07 AM
|
Joined: Mar 2003
Posts: 15,491 the boonies
aarcuda
OP
I Live Here
|
OP
I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
|
So I hate to revise and old thread but this has come back to haunt me. Apparently (as you can see from the picture of the milled manifold), the weld job on the blockoff plate I had welded into the manifold was piss poor and resulted in the plate being dislodged and sucked into the #5 cylinder where it bounced around and wadded up.
I heard a ting dingaling sound coming from the motor the other day and I tore it down to find 3 separate pieces of destroyed aluminum in the #5 cylinder. There was no real damage so I cleaned it up and Im putting it back together.
this time I'll use the intake manifold withe the steel shims instead of a welded in plate
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.
|
|
|
Re: How to block off heat riser ports
[Re: aarcuda]
#2158024
09/20/16 11:46 AM
09/20/16 11:46 AM
|
Joined: Jan 2003
Posts: 75,088 A Banana Republic near you.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,088
A Banana Republic near you.
|
Hey Steve , long time ...
It was a crappy weld job, you can see where weld was removed when the manifold was surfaced. I guess it must have come loose and fell into the cylinder while the engine was turned off and that valve was open , that's a tough one.
running up my post count some more .
|
|
|
Re: How to block off heat riser ports
[Re: aarcuda]
#2158066
09/20/16 12:51 PM
09/20/16 12:51 PM
|
Joined: Mar 2003
Posts: 15,491 the boonies
aarcuda
OP
I Live Here
|
OP
I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
|
Hey Johnrr! how ya doing! LTNS!! Ive been enjoying the crap out of my hellcat so I havent been around here much.
As for my issue, I can see the crack in the weld. I saw it before but figured it was good enough. I was wrong.
As for milling out a recessed area- ya that would have worked but I figured the weld was good enough. I used the standard Fel Pro gasket that was open to the cross over port. Im still in tear down mode. I changed out the head gasket on that one side (drivers) with a Mr. Gasket 1121 (not the 1121G but the older white style) and since this is a .028" thick gasket replacing the Fel pro 1008 (.042" thick), I'll have to remove the passenger side head and replace that gasket as well.
I bought the mopar P4186569 intake gasket with the steel block off plate for the rebuild
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.
|
|
|
Re: How to block off heat riser ports
[Re: aarcuda]
#2159577
09/22/16 06:21 PM
09/22/16 06:21 PM
|
Joined: Mar 2003
Posts: 15,491 the boonies
aarcuda
OP
I Live Here
|
OP
I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
|
ya theres no way balled up aluminum foil is going to work.. the exhaust is too hot and it will make quick work of that foil spitting it out in chunks.
The MP gasket I bought with the stainless blockoff plates came with no instructions and I seriously doubt i will get a good seal on the intake with these two thick metal plates placed in the middle of the head on the gasket. I would think youd need to have the gasket milled out to recieve the plates so when its all buttoned up, it fits in tight and almost flat.
who has used these blockoff plates?? How did you install them? did the gasket leak?
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.
|
|
|
|
|