Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

Major oil leak after 305-350 swap..HELP!!!

Thread Tools
 
Search this Thread
 
Old 11-19-2006, 02:14 PM
  #1  
Supreme Member

Thread Starter
 
86White_T/A305's Avatar
 
Join Date: Nov 2001
Location: Canada,Ont
Posts: 2,209
Received 26 Likes on 20 Posts
Car: 1987 TransAm Ttop
Engine: 2005 LQ4
Transmission: Ls1 T56
Axle/Gears: 3:42
Major oil leak after 305-350 swap..HELP!!!

Well this is the story guys,i just completed my 305-350 swap.the block is a 79 block im using a 92 tpi setup.the car runs now and im working out lil bugs and leaks but every time i run the car nearly all the oil leaks out after a long run and since my oil pressure sending unit is the wrong one i cant tell exactly what its reading.I do know that when i primed it before dropping the motor in it had really good pressure.aside from that i lifted the car up and trying to find this major leak it seems to be coming from my dipstick tube and oil is dropping onto my starter and down the dan onto my y pipe.what can i do to fix this..at first i thought my oil pan was leaking but i wiped it all down and no signs of leaks appear on any on the bolts,i tried to remove the dipstick tube from the block..clean it off..layered it with rtv sealent and put it back it and let it sit for a day or 2 to cure but it didnt stop leaking..was a alot better though.any suggestions?
Old 11-19-2006, 06:13 PM
  #2  
Supreme Member

iTrader: (1)
 
Sonix's Avatar
 
Join Date: Jul 2004
Location: Calgary, AB, Canada
Posts: 10,763
Likes: 0
Received 4 Likes on 4 Posts
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
possibly from valve covers?
Are you pretty sure it's leaking like crazy from the dipstick tube now? ie, watching it leak?
Does it leak while idling, or only when driving? ie, heavier throttle?
Maybe too much crankcase pressure? That can happen if there's no PCV system, (but i'm guessing you have that?)
Old 11-19-2006, 09:13 PM
  #3  
Supreme Member

 
camaronewbie's Avatar
 
Join Date: Sep 2002
Location: Cary, North Carolina
Posts: 9,192
Likes: 0
Received 16 Likes on 16 Posts
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
You said dripping on starter - isn't the dipstick on a 79 block to be put in on the driver side? Starter on pass side. Maybe there's a dipstick hole on driver side you need to seal? I know on my 1969 block the dipstick is on driver side.
Old 11-19-2006, 09:17 PM
  #4  
Supreme Member

Thread Starter
 
86White_T/A305's Avatar
 
Join Date: Nov 2001
Location: Canada,Ont
Posts: 2,209
Received 26 Likes on 20 Posts
Car: 1987 TransAm Ttop
Engine: 2005 LQ4
Transmission: Ls1 T56
Axle/Gears: 3:42
i do have a pcv sytem hooked up and it doesnt appear to be leaking from the valve covers.it leaks on idle and then heavier on load.when i look at it on the hoist oil is all over the top of the starter,bottom of the dipstick tube,therest of the block seems to be dry from what i can see.i think i might have to drop my y pipe,oil pan and clean everything up and seal it back up again
----------
there is a hole on the driver side for one aswell but it has been sealed off.there doesnt seem to be any leaks on the driver side at all as it remains dry.

Last edited by 86White_T/A305; 11-19-2006 at 09:19 PM. Reason: Automerged Doublepost
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
12-10-2019 07:07 PM
carattini
Transmissions and Drivetrain
6
09-10-2015 07:46 AM
dmtz956
LSX and LTX Parts
2
09-06-2015 04:45 PM
tgp1990
V6
1
09-04-2015 06:24 AM
Hotrodboba400
Firebirds for Sale
0
09-02-2015 07:28 PM



Quick Reply: Major oil leak after 305-350 swap..HELP!!!



All times are GMT -5. The time now is 03:47 AM.