Thread: Empty bolt hole leaking oil. What goes there?

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  1. #1 Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    Hi Everyone,

    I have been getting some work done on my gtp, seals and gaskets leaking making a mess. Thats all cleaned up and done but now that everything is sealed up again and the motor steam cleaned this bolt hole is leaking oil.

    It is right behind the water pump in between the belt. My mechanic is good, but he doesn't know these cars like all of you. What is supposed to be there? Just a bolt or something else?

    Thanks for your help.

    Empty bolt hole leaking oil. What goes there?-empty-jpg
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  2. #2 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    forgot to add it is a 97 Gtp. This is a replacement crate motor that was installed in 2004. The shop working on it is the shop that swapped original motor for this one.
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  3. #3 Re: Empty bolt hole leaking oil. What goes there? 
    Killa Bee Scottydoggs's Avatar
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    this is actually a 96 na block but they are all the same really. mine seems to have some kind of plug there. that area is right into the lifter valley, high up, but i could see oil making its way out. would also be causing some un metered air to get in the engine making it run off a bit. im sure you could just plug it with rtv, theres no vacuum pressure to speak of really.

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    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #4 Re: Empty bolt hole leaking oil. What goes there? 
    GXP Level Member Turbocharged400sbc's Avatar
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    iirc a 10x 1.5 thread "plug" boilt goes in there. that boss is only used on the G/H bodies with the earlier cast iron front engine mount that makes it such a PITA to replace G/H body belts.

    get a short (less than 20mm UHL) m10 x 1.5 bolt and toss it in there. allen head may be easier to get to as the original bolt/pluig is a torx drive
    ~James~ Psychotic Gearhead
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    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP
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  7. #5 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    Thanks for the pic, thats great. I was thinking, that isnt where one of the engine hoist things attach to is it? I have mine off the motor.
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  8. #6 Re: Empty bolt hole leaking oil. What goes there? 
    Turbo is the way to go. BillBoost37's Avatar
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    Nope..those go up front driver side off exhaust/head and rear passenger side. That hole might have a loose ground wire with a loop hole connector nearby. If so.. ground it with that bolt when you put it in.
    I drink..so consider that when reading my posts.

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  10. #7 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    Hi guys,

    thanks for all the info, the prob im having is that i have zzp's intercooler and when a bolt is put in that hole the engine builds a bunch of pressure according to my mechanic. He doesn't like that.
    This is a replacement crate motor installed in 04, this bolt hole has never had a bolt in it. It weeps oil when nothing is there, now i know why i always smelled oil when i used my ac or heater.
    Was I supposed to get a breather oil cap when i got the ic back in 04? No one ever said that was necessary. We are not using the zzp gasket at the moment, i see on their site they say that you cannot cut a stock gasket to work right.
    Do i need to get the zzp gasket? I had it when i installed the ic and it has been on since 04 with no prob. I forgot about it until the other day when this bolt/pressure problem cropped up.
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  11. #8 Re: Empty bolt hole leaking oil. What goes there? 
    Killa Bee Scottydoggs's Avatar
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    heres the fix for the lame zzp ic with non working pcv on one side.

    How to get PCV to work instead of valve cover breather!

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #9 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    Thanks again guys, really helps me out.
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  14. #10 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    So looking at the thread it looks like i need to drill out that brass plug in my tb and drill a hole in my oil filler cap and run a vacuum line between them? or run a breather oil filler cap.
    Those are my options? I have a early 97 gtp built in aug of 96 if that helps.

    I look at zzp's breather and they say you need to to a pcm programming change if you run the breather. but, this bolt hole has been open since i did the ic and a custom tune by paul back in probably 05ish. Do i really need a new tune, or change on the pcm to run a breather, seems this open bolt hole has been breathing in the front of the motor for 17yrs just fine. I am in socal so i have been passing smog tests fine.
    I don't have anyone that can do programming around here. so, i shouldn't run the breather and should do the drilling and line?
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  15. #11 Re: Empty bolt hole leaking oil. What goes there? 
    Killa Bee Scottydoggs's Avatar
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    not knowing your tune, but sealing off that port and running a vac line to the tb is the only way to keep un metered air from getting into the engine. if it was tuned with the hole open, maybe a breather would do. were talking a in car tune? or a canned tune?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  17. #12 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    paul from prj performance came out to so cal back in 05 i think it was and tuned a bunch of the gp's here. He custom tuned it then. The sc was put on before then and there was no mention that i can recall of breathers. but, i wonder if the guy that i helped do it pulled the plug out of the hole then. I dont remember him saying anything or doing it but obv it was done and it was a long time ago.
    i doubt it came that way from the factory. and if it did, it just so happened to help me when i put a ic on the engine that needs a breather somewhere. maybe the guy that did the ic install didnt know the hole would weep oil.
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  18. #13 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    plus the shop thats doing the work now, is the shop that installed the new motor back in 04. they caught this now, i doubt they wouldn't have then.
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  19. #14 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    the bolt hole oozing oil that is, because no bolt there
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  20. #15 Re: Empty bolt hole leaking oil. What goes there? 
    Killa Bee Scottydoggs's Avatar
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    id run the vac line, see if it runs better maybe. if it dont its easily reversed.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  21. #16 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    vac line, wouldn't that mean i need to drill the tb plug?
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  22. #17 Re: Empty bolt hole leaking oil. What goes there? 
    Killa Bee Scottydoggs's Avatar
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    yes it would.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  23. #18 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    wouldnt it be easier to not drill and pop on a breather oil cap?
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  24. #19 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    or is it that the vac line is a more professional way of doing it?
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  25. #20 Re: Empty bolt hole leaking oil. What goes there? 
    SE Level Member dirtyape's Avatar
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    oh i reread your comments, un metered air. since the car has been getting unmetered air from the bolt hole for so long and was tuned that way, wouldn't it be better to have non metered air going in?
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