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Cobra Intake Install

  • Thread starter Thread starter 87gtconv
  • Start date Start date Oct 4, 2005
8

87gtconv

ragtopman
Founding Member
Feb 11, 1999
2,595
0
0
Southern Calif
Oct 4, 2005
#1
  • Oct 4, 2005
  • #1
Anyone out there know what I need to replace my stock intake with a Cobra intake that I bought here? Yes, I know about the gaskets ffor the TB and upper and lower for the intake, but anythiang else I need. I did search out the diagram to hook up the hoses but what about any hardware??? Any tips?? BTW I am also putting on a Cobra 65mm TB. Hate to start a project and get stuck on needed more parts.
 
S

Sicarius428

Active Member
Jan 6, 2004
2,085
5
49
Oct 4, 2005
#2
  • Oct 4, 2005
  • #2
Go to OSH and get some studs to line up the lower when you put it on. I believe its a 5/16 but bring an intake bolt just to compare. That way you can drop the intake strait down without disrupting the gasket or silicon at the front and back of the intake. Another thing is you can toss the cork gaskets and just put a really fat bead of ultra black there instead. It tends to bond better if the mating surfaces are clean and dry. Go over the final torque settings a total of 3 times to make sure that all the bolts are tight and evenly applying pressure.
Kevin
 

srothfuss

Last night I stabbed the same guy 7 times in a row
Oct 17, 2004
1,796
3
0
Woodward Ave.
Oct 4, 2005
#3
  • Oct 4, 2005
  • #3
You can search for the username "5spd GT" for a decent write up on how / what you will need for a intake install
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Oct 4, 2005
#4
  • Oct 4, 2005
  • #4
Here's some tips...

Tools: a good torque wrench is a must have item. A razor blade scraper that holds a single edge razor blade from Home Depot or Ace hardware is another handy thing. Get a Chilton or Haynes shop manual - you'll need it for the bolt torques and patterns. The intake manifold has an especially odd pattern. You'll need access to a timing light to set the timing after you re-stab the distributor. Look in the A/C repair section for the fuel line tools. They look like little plastic top hats. You will need the 1/2" & 5/8" ones. The hat shaped section goes on facing the large part of the coupling. Then you press hard on the brim until it forces the sleeve into the coupling and releases the spring. You may need someone to pull on the line while you press on the coupling. Put some motor oil on them when you put the line back together.

The A/C Compressor comes off with lines still connected. Mark all the electrical, smog and vacuum lines with tags to help you remember where to re-connect them. If you have a digital camera, take several pictures.

Whatever you do, don't skimp on cleaning the gasket surfaces. New gaskets need to seat against bare metal and not the residue left from the old gaskets in order to seal leak free. This is the most time consuming and tiresome part of the job. Look for little things that need to be replaced like the short hose from the thermostat hosing to the water pump, damaged vacuum lines and hose clamps that are rusted or broken.

Plan on cutting the thermostat to water pump hose, or removing the thermostat housing. Also plan on removing the distributor to get clearance to remove the intake manifold. Remove #1 spark plug, stick your finger in the spark plug hole and crank. When your finger gets air moving past it, stop cranking. Turn the engine until the timing marks line up with the pointer. Now you can pull the distributor out.

My favorite trick that saves time and effort is the stay in place gasket. Be sure that you scrape (don't use a wire brush) all the old gasket material off, then clean all the surfaces with acetone or MEK.

When the surfaces are clean, use weather strip adhesive on the head to manifold surface, and on the side of the gasket that mates to the head. Follow the instructions on the tube or can and when it gets tacky, press the gasket down on the head.

Clean the area where the rubber rails mount to the block in front and in the rear with more acetone or MEK and do the same trick with the weather strip adhesive that you did to the heads.

Coat the rubber seals and the gasket area around the water passages with lots of Blue Silicone gasket sealer and put it together. Wala! no leaks, and no gaskets that shifted out of place.

Fuel injector seal kits with 2 O rings and a pintle cap (Borg-Warner P/N 274081) are available at Pep Boys auto parts. Cost is about $2.74 per kit. The pintle caps fit either injectors with a pin sticking out the injector end or 4 with more tiny holes in the injector end. The following are listed at the Borg-Warner site ( http://www.borg-warner.com ) as being resellers of Borg-Warner parts:

http://www.partsplus.com/ or http://www.autovalue.com/ or http://www.pepboys.com/ or http://www.federatedautoparts.com/

Most of the links above have store locators for find a store in your area.

Use motor oil on the O rings when you re-assemble them & everything will slide into place. The gasoline will wash away any excess oil that gets in the wrong places and it will burn up in the combustion chamber.

Consumable items:
Upper manifold gasket
Fel Pro 1250 or equal lower manifold gasket set.
Short formed hose between thermostat hosing and intake manifold
6 ft 7/64" or 1/8" vacuum hose
2 ft 1/2" heater hose
1 1/2 ft 5/8" heater hose
Blue Silicone sealer
ARP antiseize or equal for the bolts
4 each 3/4" hose clamps (spare item in case the old ones are bad)
4 each 1/2" hose clamps (spare item)
 

Daniel50

New Member
Mar 30, 2005
716
1
0
Discovery Bay, CA
Oct 4, 2005
#5
  • Oct 4, 2005
  • #5
i just did this install. its not to easy if your doin it for the first time trust me lol. took me about 10 combined hours. gasket scrapping sucks but make sure you do a good job and its perfectly clean.
 
J

jaackal

New Member
May 12, 2003
402
0
0
NJ
Oct 4, 2005
#6
  • Oct 4, 2005
  • #6
i have a couple posts on here about how to do it so do a search for me
 
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