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Intake Gasket Recommendation

GC
Greg Crawford
Sat, May 8, 2021 12:45 AM

I ordered intake manifold gaskets and block off plates from Dick Paterson back during the week of April 12, prior to removing my intake manifold for
the preventive maintenance of installing block off plates.
I have since removed the intake and discovered that it already had Moroso stainless block off plates installed.

So I have been patiently waiting for the USPS to deliver my gaskets from Canada. Unfortunately, they were processed in Chicago on April 25, and not
seen since. Canada Post tracking says "Delayed".

Since I have the Moroso plates, and I want to get this thing put back together, what are the gaskets you would recommend? I don't want to chance
ordering from out of the country again. I have NAPA, Autozone, Advance Auto, and O'Reilly all down the street from me, plus Rock Auto, so I feel I can
get something quickly.

Thank you.

Greg Crawford
KM4ZCR
Knoxville, TN

"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags

I ordered intake manifold gaskets and block off plates from Dick Paterson back during the week of April 12, prior to removing my intake manifold for the preventive maintenance of installing block off plates. I have since removed the intake and discovered that it already had Moroso stainless block off plates installed. So I have been patiently waiting for the USPS to deliver my gaskets from Canada. Unfortunately, they were processed in Chicago on April 25, and not seen since. Canada Post tracking says "Delayed". Since I have the Moroso plates, and I want to get this thing put back together, what are the gaskets you would recommend? I don't want to chance ordering from out of the country again. I have NAPA, Autozone, Advance Auto, and O'Reilly all down the street from me, plus Rock Auto, so I feel I can get something quickly. Thank you. -- Greg Crawford KM4ZCR Knoxville, TN "Ruby Sue" 1977 Royale Rear Bath 403 Engine American Eagle Wheels Early Version Alex Sirum Quad bags
RM
Robert Mueller
Sat, May 8, 2021 1:24 AM

I would carefully remove the gaskets currently installed and measure their thickness (naturally they will be somewhat compressed). Once that's done
contact the various vendors and ask what thickness their gasket are.

Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426

I would carefully remove the gaskets currently installed and measure their thickness (naturally they will be somewhat compressed). Once that's done contact the various vendors and ask what thickness their gasket are. -- Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
JR
Jon Roche
Sat, May 8, 2021 2:57 AM

Mr gasket 404
Are
The ones.    Jim bounds uses those as well.  But having installed those.  And also dick paterson.  The 404 work, but you really have to be careful
installing the intake.  They are very close on the ports and if they move just a little, you could have problems.

Dick paterson gaskets just fit so much nicer and give you such a better feeling that you have them sitting well
In place.

Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/

Mr gasket 404 Are The ones. Jim bounds uses those as well. But having installed those. And also dick paterson. The 404 work, but you really have to be careful installing the intake. They are very close on the ports and if they move just a little, you could have problems. Dick paterson gaskets just fit so much nicer and give you such a better feeling that you have them sitting well In place. -- Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/
RK
roy keen
Sat, May 8, 2021 6:08 PM

Last time I used the 404 gaskets they were made by Mr gasket.

Roy Keen
Minden,NV
76 X Glenbrook

Last time I used the 404 gaskets they were made by Mr gasket. -- Roy Keen Minden,NV 76 X Glenbrook
GC
Greg Crawford
Sat, May 8, 2021 11:33 PM

Thank you. I am looking for the Mr. Gasket ones now. Seems to be harder to find the ones for the 403.

Greg Crawford
KM4ZCR
Knoxville, TN

"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags

Thank you. I am looking for the Mr. Gasket ones now. Seems to be harder to find the ones for the 403. -- Greg Crawford KM4ZCR Knoxville, TN "Ruby Sue" 1977 Royale Rear Bath 403 Engine American Eagle Wheels Early Version Alex Sirum Quad bags
RM
Robert Mueller
Sun, May 9, 2021 1:27 AM

The gasket between the intake manifold and the heads (turkey tray) on the 403 and 455 was aluminum with a raised crush seal, it was very thin. The
problem with the aftermarket gaskets is that they are much thicker and raise the intake manifold. it's not a problem on most engines, however, it can
be. I went through my folder on the INTAKE MANIFOLD and found this; Fel Pro gasket 1356 is 0.060" thick. I also found a note from Dick Patterson
noting that his gaskets are 0.027 to 0.030 thick. Mondello sells this gasket:

https://mondelloperformance.com/shop/gaskets-sealants/intake-manifold-gaskets-sold-in-pairs/ig-505-gr-intake-gaskets-big-block-400-425-455/

It is NOT 0.25 in. thick!

Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426

The gasket between the intake manifold and the heads (turkey tray) on the 403 and 455 was aluminum with a raised crush seal, it was very thin. The problem with the aftermarket gaskets is that they are much thicker and raise the intake manifold. it's not a problem on most engines, however, it can be. I went through my folder on the INTAKE MANIFOLD and found this; Fel Pro gasket 1356 is 0.060" thick. I also found a note from Dick Patterson noting that his gaskets are 0.027 to 0.030 thick. Mondello sells this gasket: https://mondelloperformance.com/shop/gaskets-sealants/intake-manifold-gaskets-sold-in-pairs/ig-505-gr-intake-gaskets-big-block-400-425-455/ It is NOT 0.25 in. thick! -- Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
RK
roy keen
Sun, May 9, 2021 4:29 AM

The mr gaskets are thicker then Dicks gaskets but I didn’t have a problem with them using the stock intake I got the last sett from summit.

Roy Keen
Minden,NV
76 X Glenbrook

The mr gaskets are thicker then Dicks gaskets but I didn’t have a problem with them using the stock intake I got the last sett from summit. -- Roy Keen Minden,NV 76 X Glenbrook
GC
Greg Crawford
Sun, May 9, 2021 11:19 PM

Thanks, guys, for the replies. I'll make a decision and order something.

Greg Crawford
KM4ZCR
Knoxville, TN

"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags

Thanks, guys, for the replies. I'll make a decision and order something. -- Greg Crawford KM4ZCR Knoxville, TN "Ruby Sue" 1977 Royale Rear Bath 403 Engine American Eagle Wheels Early Version Alex Sirum Quad bags
GC
Greg Crawford
Mon, May 10, 2021 4:45 PM

I just ordered the Mr. Gasket 405G set for the 403. It does not come with the end seals, and it measures .060" thick. They were $27.00 plus shipping
from Summit Racing. Other sources did not have them in stock.

I measured the gaskets that were on the intake, and they measured .074" uncompressed and .057" compressed. They may have been .060" and swelled
somewhat with age and oil.

The Mondello stainless block off plates measured about .025". Mr. Paterson recommended that I soak the new gaskets in water to soften them and allow
the stainless plates to recess into the gasket material

somewhat.

Greg Crawford
KM4ZCR
Knoxville, TN

"Ruby Sue"
1977 Royale
Rear Bath
403 Engine
American Eagle Wheels
Early Version Alex Sirum Quad bags

I just ordered the Mr. Gasket 405G set for the 403. It does not come with the end seals, and it measures .060" thick. They were $27.00 plus shipping from Summit Racing. Other sources did not have them in stock. I measured the gaskets that were on the intake, and they measured .074" uncompressed and .057" compressed. They may have been .060" and swelled somewhat with age and oil. The Mondello stainless block off plates measured about .025". Mr. Paterson recommended that I soak the new gaskets in water to soften them and allow the stainless plates to recess into the gasket material somewhat. -- Greg Crawford KM4ZCR Knoxville, TN "Ruby Sue" 1977 Royale Rear Bath 403 Engine American Eagle Wheels Early Version Alex Sirum Quad bags
JA
John and Sharon Kent
Mon, Jun 7, 2021 3:05 PM

What an excellent idea, soaking the gasket in water to let the plates recess into the gaskets. Thank you!

What an excellent idea, soaking the gasket in water to let the plates recess into the gaskets. Thank you!