Enjoy 5% OFF at VEVOR Canada! and Support Canadian Poncho at the Same Time!
Members Login
Username 
 
Password 
    Remember Me  
Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> 67 327 intake heat shield. Can it be removed?
Post Info TOPIC: 67 327 intake heat shield. Can it be removed?
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10455
Date:
67 327 intake heat shield. Can it be removed?
Permalink  

Cleaning my 327 cast iron intake. I'd like to take the heat shield on the bottom off. I think to clean it properly it needs to come off.

Can it be removed...then put back on? How is it even fastened? I haven't tried prying at it yet for fear of damaging it.

39653828513_a8d4f154ba.jpg



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
GLHS60


Poncho Master!

Status: Offline
Posts: 1909
Date:
Permalink  

Its fastened with 4 removable rivets.

I use a chisel and hammer to remove them, not chop them off but gently pry them up.

The rivet shafts have little ernts on them so when reinstalled in a different position they hold tight.

Thanks
Randy



__________________

Sherwood Park
Alberta, Canada

 
Fall into savings UP TO C $50 OFF Shop now
Fall into savings UP TO C $50 OFF Shop now
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10455
Date:
Permalink  

Thanks Randy. I'll get to it.



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
norontcan


Canadian Poncho Superstar!

Status: Offline
Posts: 6984
Date:
Permalink  

Believe it is held in place by a special rivet type, the name of which escapes me.
The head you can see. The shaft is most probably about 1/2" to 3/4" long and looks like it has chisel marks punched into it. Giving it an appearance somewhat like an ardox nail. When tapped into the softer metal of the intake the chisel marks grab and hold.
Once you remove the existing ones by grabbing them with vice grips you should be able to find new ones at a good specialty faster store such as Rastall.
Hope this helps

__________________
GLHS60


Poncho Master!

Status: Offline
Posts: 1909
Date:
Permalink  

Take your time and you will be surprised how easy they come out.

Let us know how much crap is under the shield, there is normally a significant amount.

Thanks
Randy

__________________

Sherwood Park
Alberta, Canada

 
CDN2PLS2


Uber Guru

Status: Offline
Posts: 3142
Date:
Permalink  

I also put a dab of loctite and hammer home.

__________________
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10455
Date:
Permalink  

I guess it wouldn't be good to have the rivets come free! 

What exactly is the purpose of the shield?



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
Fall into savings UP TO C $50 OFF Shop now
Fall into savings UP TO C $50 OFF Shop now
Bill shuba


Guru

Status: Offline
Posts: 732
Date:
Permalink  

I thought with a lot of fooling around with brushes and solvent I got mine pretty clean..found out that it can and should be removed and was shocked by the stuff I had missed..glad I did it..really easy to do

__________________
GLHS60


Poncho Master!

Status: Offline
Posts: 1909
Date:
Permalink  

cdnpont wrote:

I guess it wouldn't be good to have the rivets come free! 

What exactly is the purpose of the shield?

It's to help keep oil splash off the bottom of the intake manifold heat crossover passage.

Oil that gets excessively heated turns into a nasty coke like substance that Bill mentioned above.

 

Thanks

Randy



-- Edited by GLHS60 on Saturday 5th of January 2019 04:57:56 PM

__________________

Sherwood Park
Alberta, Canada

 
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10455
Date:
Permalink  

Sweet Jesus!...

45706186675_0637c58942_z.jpg31679407037_dc1e871d9b_z.jpg

I can imagine how much good that coke would do dropping down into the lifter galley.



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
CdnGMfan


Canadian Poncho Superstar!

Status: Offline
Posts: 4852
Date:
Permalink  

I believe the correct term for the shield is "Valley Cover".



__________________

67 Chevelle Malibu Sport Coupe, Oshawa-built 250 PG never disturbed.

In garage, 296 cid inline six & TH350...

Cam, Toronto.


I don't judge a man by how far he's fallen, but by how far back he bounces - Patton
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 49872
Date:
Permalink  

cdnpont wrote:

45706186675_0637c58942_z.jpg31679407037_dc1e871d9b_z.jpg

I can imagine how much good that coke would do dropping down into the lifter galley.




I guess I better pull the cover off my big block intake before I install it. I've never taken one off before.

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Fall into savings UP TO C $50 OFF Shop now
Fall into savings UP TO C $50 OFF Shop now
cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10455
Date:
Permalink  

Good idea Carl.

I guess that exhaust passage in the intake gets a little hot, like exhaust manifold hot? 

Is that coke pile a reflection of old oil technology in that it burns at a lower temperature?



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 49872
Date:
Permalink  

I'm wondering if it has more to do with the fact that it's dirty contaminated oil so there's material in the oil that burns dirty like that.

I wonder, if it was strictly clean oil in the engine all the time, would it look like that under the cover? I bet it wouldn't.

Those rivets come out fairly easy Mark?

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
GLHS60


Poncho Master!

Status: Offline
Posts: 1909
Date:
Permalink  

Carl Stevenson wrote:
cdnpont wrote:

 

 

45706186675_0637c58942_z.jpg31679407037_dc1e871d9b_z.jpg

I can imagine how much good that coke would do dropping down into the lifter galley.


 



I guess I better pull the cover off my big block intake before I install it. I've never taken one off before.

MK IV's don't have a removable heat shield!!

Thanks

Randy

 

 



__________________

Sherwood Park
Alberta, Canada

 
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 49872
Date:
Permalink  

I just checked my intake and you are absolutely right Randy, I'd have a heck of a time removing a non existent part!



__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 49872
Date:
Permalink  

Yet another reason to do big blocks rather than small blocks!

__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Fall into savings UP TO C $50 OFF Shop now
Fall into savings UP TO C $50 OFF Shop now
GLHS60


Poncho Master!

Status: Offline
Posts: 1909
Date:
Permalink  

GM used to sell one part # 3931093 and the aftermarket probably does as well.

Thanks
Randy


__________________

Sherwood Park
Alberta, Canada

 
66 327 sd


Guru

Status: Offline
Posts: 701
Date:
Permalink  

I had the same mess to deal with when I found a replacement manifold for my quadrajet a few years back.

__________________
Pontiacanada


A Poncho Legend!

Status: Offline
Posts: 20744
Date:
Permalink  

I did mine. Found about the same amount of crud. I drilled mine out (prying didn't work). I also have a bunch of new replacement rivets if you need them.

While I was at it, I also cleaned out the runners/bore, and knocked back any outside/inside cast metal flashing.

IMG_1269.JPG

IMG_1270.JPG

IMG_1420.JPG

 



-- Edited by Pontiacanada on Sunday 6th of January 2019 07:23:00 AM

Attachments
__________________

Prince Edward Island

'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.

cdnpont


Canadian Poncho Superstar!

Status: Offline
Posts: 10455
Date:
Permalink  

That thing is a work of art Darryl. Nice.

Thanks for the rivet offer. I'm thinking I might just drill and tap the rivet holes for a small machine screw. Put them in with red locktite.



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 
seventy2plus2


Canadian Poncho Superstar!

Status: Offline
Posts: 7707
Date:
Permalink  

GLHS60 wrote:
Carl Stevenson wrote:
cdnpont wrote:

 

I can imagine how much good that coke would do dropping down into the lifter galley.


 

I guess I better pull the cover off my big block intake before I install it. I've never taken one off before.

MK IV's don't have a removable heat shield!!

Thanks

Randy

 

 

 My 1970 cast iron big block intake has a removable heat shield.  



__________________
70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop

 

 
Fall into savings UP TO C $50 OFF Shop now
Fall into savings UP TO C $50 OFF Shop now
GLHS60


Poncho Master!

Status: Offline
Posts: 1909
Date:
Permalink  

I should have been more specific, the factory high rise didn't have the removable heat shield where ihe low rise did.

I've removed the shields on many intakes for cleaning and never broke a rivet, what's up with you rivet busters!!

Thanks
Randy



__________________

Sherwood Park
Alberta, Canada

 
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> 67 327 intake heat shield. Can it be removed?
Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.