89 TPI. Oil sender plug leak
#1
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
89 TPI. Oil sender plug leak
My 89 L98 GTA has had a pretty good oil leak since last year. Went through a quart in 200 miles This whole time i thought it was my intake or distributor seal. Noticed recently that there was even some spatter patterns on the firewall
upon further inspection and using oil dye, it seemed that there was a lot of dye around this plug that is on the top rear of the engine block. a buddy of mine has an 88 GTA and said that's where his oil sender is. however mine is located on the bottom by the oil filter
So do these commonly leak? it would make sense with it being under a lot of pressure and whatnot.
upon further inspection and using oil dye, it seemed that there was a lot of dye around this plug that is on the top rear of the engine block. a buddy of mine has an 88 GTA and said that's where his oil sender is. however mine is located on the bottom by the oil filter
So do these commonly leak? it would make sense with it being under a lot of pressure and whatnot.
#2
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From: Round Rock, TX
Car: 1988 Firbird formula 350
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 3.27 Nine Bolt
Re: 89 TPI. Oil sender plug leak
It's exposed to what ever oil pressure the engine normally produces. I'd take out the plug and make sure it's not cross threaded. Clean the threads, apply some Teflon pipe thread tape, put it back in tight but not overtight. Don't want to strip the threads
#3
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
Is there a tool you recommend to remove it? I'm trying to do this without having to remove the lower intake..
#4
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From: Round Rock, TX
Car: 1988 Firbird formula 350
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 3.27 Nine Bolt
Re: 89 TPI. Oil sender plug leak
I don't know for sure without seeing the plug. Mine has the sender unit in that spot, which I recently changed with just a wrench, didn't have to any intake parts off.
#5
Joined: Oct 2001
Posts: 11,918
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 89 TPI. Oil sender plug leak
If it has the factory plug you need a little 8pt socket.
#6
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From: Mead, WA
Car: '84 Berlinetta
Engine: ZZ4
Transmission: BT0D stage 3 w/22oo
Axle/Gears: 3.23 posi disc
Re: 89 TPI. Oil sender plug leak
These can be problematic with leaking, the factory oil sensors on the small block engines often end up with an oil trail all the way down the bell housing. Like Lonestar7 said, teflon tape it and reinstall or get a slightly longer plug from a hardware store for more thread contact and use 4 to 5 wraps of teflon.
#7
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From: albany ny
Car: 1989 formula firebird
Engine: 305 tpi
Transmission: m5
Axle/Gears: 3.45
Re: 89 TPI. Oil sender plug leak
I have the same problem did u ever fix your leak? I took my plug out which had a square end on it Teflon taped it and put it back in and it still leaks a little when revving engine. Is the square plug the original plug? Should I try a longer plug?
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#8
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
I just wrapped a lot of Teflon tape around the threads and then got it nice and tight. Still in the process of putting it back together. I'm not liking that you said it still leaks after you did that lol
#11
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From: albany ny
Car: 1989 formula firebird
Engine: 305 tpi
Transmission: m5
Axle/Gears: 3.45
Re: 89 TPI. Oil sender plug leak
Maybe I should put more tape on it. Did you remove the dizzy to get it out? I am going to take it out again and try to fine a better plug. I really thought I had it fixed did not leak for a couple days tell I started to beat on it then it started to leaking slowly.
#12
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
Yep I found that removing the dizzy made things easier. Try more tape and see if that works. Did you use a 9/32 wrench to take the plug out?
#14
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From: albany ny
Car: 1989 formula firebird
Engine: 305 tpi
Transmission: m5
Axle/Gears: 3.45
Re: 89 TPI. Oil sender plug leak
I really just don't get how it would leak even without the Teflon tape the plug was super tight to begin with.
#15
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
Yea mine was tight too. I really hope it fixes it cause the *** of my car is covered in oil lol
#17
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
Nah. I feel weird putting anything other than oil in there.
#18
Joined: Oct 2001
Posts: 11,918
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 89 TPI. Oil sender plug leak
A 8pt socket set is what you need for this. Be very careful on how tight you go with it because the back of the china wall can break off if its to tight.
Maybe thats whats going on, a small crack in the wall. Hope not!!!
Maybe thats whats going on, a small crack in the wall. Hope not!!!
#19
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
I hope not too. I've never messed with it til now so I really hope there's no crack
#20
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
Got everything back together and didn't fix the leak one bit
#21
Joined: Mar 2000
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: 89 TPI. Oil sender plug leak
Sounds more like a china wall leak.
#22
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
I suppose there's no way to fix that other than a new block huh
#23
Joined: Mar 2000
Posts: 5,680
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
#24
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
#25
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From: Round Rock, TX
Car: 1988 Firbird formula 350
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 3.27 Nine Bolt
Re: 89 TPI. Oil sender plug leak
Have you actually seen any oil leaking with the engine running? Have someone rev it while you watch the area where you think the leak is with a bright flashlight. I wonder if it could be leaking somewhere around the dizzy shaft?
#26
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: 89 TPI. Oil sender plug leak
I put some oil dye in there and used a UV light and that's where most of the uv light showed up
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