Ad Radar
High Performance Pontiac
Click here to find out more!

78 Trans Am 400 freeze plugs

  
High Performance Pontiac
Item Posts    Sort Order

78 Trans Am 400 freeze plugs

 
jimus08 jimus08
New User | Posts: 22 | Joined: 09/11
Posted: 12/08/13
09:18 AM

Is it possible to change freeze plugs on the passenger side of the motor with it in the car.
Also does the fender have to be removed to change the blower motor on my Trans Am?
Thanks any help will be appreciated.  

wayne712222 wayne712222
Moderator | Posts: 235 | Joined: 10/13
Posted: 12/08/13
10:27 AM

the dorman freeze plug kit is #567-016 in brass.. usually cheeper to buy the kit.. than individual freeze plugs when you need more than 2 or 3..

individual 555-041  Steel Cup Expansion Plug 1-61/64 In., Height 0.510
individual 565-041  Brass Cup Expansion plug.


1979-67 Cylinder Head - 1-3/8"  555-025 steel,    565-025 brass for the ends of the heads

don't forget that there are freeze plugs on the back or the block.. left and right.. the center one is the cam plug and does not need changing.. those can get done by dropping the transmission.

i have done pontiac freeze plugs in with the engine installed..  its not easy..

these engine support bars stretched across the fender inner  mounting flange can be a real help..

Image 11976


i have not thought about it in years.. but somebody used to have air powered freeze plug drivers..

i wonder if one had access to a lathe.. if one could make a dedicated freeze plug driver for this palm nailer..  with a flanged area to limit depth of installation.

http://www.youtube.com/watch?v=cMfMKvxmQgg




and.. if you don't have a lot of rust.. you don't have to take the fender off..

you unbolt the back of the inner fender well...  usually you have to undo the bolts all the way across the wheel well opening so you an push it down.. and hold it spread down with some wooden blocks... then you can reach thru to get the blower motor out..  flexing it down.. without kinking it.. is the idea..  

i have seen people loosen the inner front bolts several turns so there is less bending of the inner fender..  

jimus08 jimus08
New User | Posts: 22 | Joined: 09/11
Posted: 12/08/13
11:36 AM

Thanks for the info I do appreciate the help.....  

jimus08 jimus08
New User | Posts: 22 | Joined: 09/11
Posted: 12/08/13
11:36 AM

Thanks for the info I do appreciate the help.....  

idrivejunk idrivejunk
Addict | Posts: 5144 | Joined: 12/09
Posted: 12/08/13
06:35 PM

jimus, about the blower motor ... I'm a Grand Prix guy and haven't messed with Firebirds much but for what its worth-

1979 MOTOR Repair Manual states that 74-6 standard procedure is to slice the inner fender but for 77-79 all its says is unplug, unbolt and remove. So there must be a way with the fender still on it.  
idrivejunk

ROWSLEY ROWSLEY
Guru | Posts: 1016 | Joined: 07/11
Posted: 12/08/13
08:55 PM

+2 wayne

no matt it can not be done with the inner fender still in on a f-body!

you will have more room to work if you remove the tire befor you start pulling bolts.  
76 455/4spd TRANS AM
69 GRAND PRIX 455/5SPD

jimus08 jimus08
New User | Posts: 22 | Joined: 09/11
Posted: 12/10/13
11:32 AM

Thanks for the replies I appreciate the help.  

Brazil Brazil
Addict | Posts: 3949 | Joined: 06/09
Posted: 12/10/13
01:12 PM

Drain radiator till below freeze plug level, apply smooth but robust amount of JB Weld over leak, wait 24 hours, go. A heat lamp helps with curing.

Does not apply to back plugs, those have gotta go. A mean screwdriver, hammer, and elbow grease for removal, and a 1¾" (approx) socket to delicately hammer in the new freeze plug. Clean the mating surfaces first and apply a thin smear of high temp RTV to help with getting it in straight.

If you've ever replaced axle bearings, it's a similar procedure - good luck!