| [GMCnet] Problem removing intake manifold [message #308499] |
Mon, 10 October 2016 12:19  |
Advanced Concept Ener
Messages: 112
Registered: December 2014
Karma: 0
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Senior Member |
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Is there some special tool or procedure to get my 455 intake manifold off. All bolts and hoses and brackets are off or loose but can't seem to get intake to budge. Tried banging with mallet, leverage with pinch bar in carb opening. Has someone built a strong back to put across engine compartment opening with brackets to bolt to intake threaded taps?
Really don't want to reinvent the wheel or break the thing into pieces trying to pull it and then worry about what got into the oil.
Pulled my intake from the 403 , twenty ( maybe thirty) years ago an D I don't remember it being this hard. Engine only has 2000 miles on it since it was rebuilt.
Any and all suggestion welcome before I go at it with a sledge hammer.
Jon Darcy ACES
North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,Manny Trans, FiTech FI,Honda 6010
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| Re: [GMCnet] Problem removing intake manifold [message #308505 is a reply to message #308499] |
Mon, 10 October 2016 13:56  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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the manifold is heavy! I would make some sort of lifting device, not only to take it off, but to easily lower it into the correct place(more important)
I suggest taking out the two front seats(took me less then 10 minutes in my old coach. I used some jack stand on each seat base and a bar across the engine compartment. Make sure it is super sturdy, and will not tip side to side, or break out your side windows. I used a bunch of super heavy duty zip ties to hold the bar in place, and made sure it would not tip on me. Lowering the manifold in slowly helped huge not messing up the RTV.
if all the bolts are truely out, it is just plain glued on by the RTV front and back. Carefully pry with a wood chisel:
https://www.amazon.com/Stanley-16-150-Short-3-Piece-Chisel/dp/B00002X1YO/ref=sr_1_1?ie=UTF8&qid=1476125572&sr=8-1&keywords=wood+chisel
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] Problem removing intake manifold [message #308506 is a reply to message #308505] |
Mon, 10 October 2016 14:23 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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You gotta break that seal.
I usually just jam a screw driver or two in at the front seal, it has a nice big gap, and force it apart.
yes slowly
yes carefully
no not so much actually jamming
I can lift the intake out, I straddle the hatch and dead lift it.
But I'm dumb like bull.
----------------------------------------
>
> the manifold is heavy! I would make some sort of lifting device, not only to take it off, but to easily lower it into the correct place(more
> important)
>
> I suggest taking out the two front seats(took me less then 10 minutes in my old coach. I used some jack stand on each seat base and a bar across the
> engine compartment. Make sure it is super sturdy, and will not tip side to side, or break out your side windows. I used a bunch of super heavy duty
> zip ties to hold the bar in place, and made sure it would not tip on me. Lowering the manifold in slowly helped huge not messing up the RTV.
>
>
> if all the bolts are truely out, it is just plain glued on by the RTV front and back. Carefully pry with a wood chisel:
> https://www.amazon.com/Stanley-16-150-Short-3-Piece-Chisel/dp/B00002X1YO/ref=sr_1_1?ie=UTF8&qid=1476125572&sr=8-1&keywords=wood+chisel
>
>
>
>
>
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Problem removing intake manifold [message #308518 is a reply to message #308499] |
Mon, 10 October 2016 16:55 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Try at the rear left corner by driving a sharp screw driver and wedging it.
Also a hard wrap with a sledge driver.
On Mon, Oct 10, 2016 at 10:19 AM, Advanced Concept Energy Solutions <
aces4nrg@gmail.com> wrote:
> Is there some special tool or procedure to get my 455 intake manifold off.
> All bolts and hoses and brackets are off or loose but can't seem to get
> intake to budge. Tried banging with mallet, leverage with pinch bar in carb
> opening. Has someone built a strong back to put across engine compartment
> opening with brackets to bolt to intake threaded taps?
> Really don't want to reinvent the wheel or break the thing into pieces
> trying to pull it and then worry about what got into the oil.
> Pulled my intake from the 403 , twenty ( maybe thirty) years ago an D I
> don't remember it being this hard. Engine only has 2000 miles on it since
> it was rebuilt.
> Any and all suggestion welcome before I go at it with a sledge hammer.
>
> Jon Darcy ACES
> North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,Manny
> Trans, FiTech FI,Honda 6010
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Problem removing intake manifold [message #308519 is a reply to message #308499] |
Mon, 10 October 2016 17:28 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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G'day,
Obviously the manifold has been sealed to the head.
To do the least amount of damage to the sealing surfaces; separate the manifold from the head in as many places as you can get to by
driving a narrow (1 inch or less wide) putty knife with radiused corners and edges between the two; "cutting" the seal.
Then drive a screwdriver in an area where it is least likely to damage the sealing surface to finish the process.
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: Advanced Concept Energy Solutions
Is there some special tool or procedure to get my 455 intake manifold off. All bolts and hoses and brackets are off or loose but
can't seem to get intake to budge. Tried banging with mallet, leverage with pinch bar in carb opening. Has someone built a strong
back to put across engine compartment opening with brackets to bolt to intake threaded taps?
Really don't want to reinvent the wheel or break the thing into pieces trying to pull it and then worry about what got into the oil.
Pulled my intake from the 403 , twenty ( maybe thirty) years ago an D I don't remember it being this hard. Engine only has 2000
miles on it since it was rebuilt.
Any and all suggestion welcome before I go at it with a sledge hammer.
Jon
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GMCnet mailing list
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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