[DeTomaso] Cylinder Heads leaking
Asa Jay Laughton
asajay at asajay.com
Mon Nov 23 14:19:04 EST 2015
For a compression test you need all the valves properly operating in
order to get air into and out of the cylinders.
You need a well charged battery.
You need to block OPEN the throttle bodies on the carb.
Before moving to any other conclusions, you need to perform the test
correctly. Then come back, give us the results and we can give you more
advice.
You should be able to get a hose into the spark plug hole of #4. Do NOT
use one of those compression testers that you have to "hold" into the
hold. Get one that has a longer hose that screws into the spark plug
hole and remote gauge. These work much better, will allow you to get
into all the spark plug holes and give you more accurate readings.
Something like this:
http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Compression-Tester/_/R-BK_7768080_0434862016
From any good auto parts store.
Asa Jay
Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
& Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com
http://www.teampanteraracing.com
http://facebook.com/racingagainstautism
On 11/22/2015 4:42 PM, sean mundy wrote:
> Compression test shows
> 1= 160
> 2= 120
> 3= 200
> 4= couldnt get the comp tester in the spark plug hole. Too tight with
> the coolant tank in the way.
> On 5-8 I was hooking up the comp tester and getting really bad
> readings but I didn't have the rockers arms installed
> and I think that is necessary. Not sure if the readings I did get
> show a piston ring problem or a valve leak.
> I will do a leak down test next when I pick up a tester.
>
> ------------------------------------------------------------------------
> Date: Sat, 21 Nov 2015 07:00:21 -0800
> Subject: Re: [DeTomaso] Cylinder Heads leaking
> From: asajay at asajay.com
> To: seanmundy at hotmail.com
> CC: ehpantera at yahoo.com; mikeldrew at aol.com; detomaso at poca.com
>
> The air is probably leaking past the rings, which have a designed in
> gap. With the valves closed, the cylinder is NOT a hermetically
> sealed container.
>
> Asa Jay
>
> /Sent using Jedi Mind Tricks/
>
>
> sean mundy <seanmundy at hotmail.com> wrote:
>
> I tried pumping air into 7 and 8 spark plug holes and both I can hear
> air leaking. I have all my rockers removed on that side so all the
> valves should be closed. I've tried a few different types of gaskets
> but buying the CHI specific ones seemed to be the best approach. They
> fit perfect so I hoped my valve seals were the problem especially
> since there is a lot of blue smoke on startup after the car has been
> sitting awhile. I re torqued the heads thinking the air leak could
> only be either the valves or a leaking head gasket. I have no signs
> of coolant in my oil. Maybe I have multiple problems ?
>
> Date: Sat, 21 Nov 2015 00:52:12 +0000
> From: ehpantera at yahoo.com
> To: seanmundy at hotmail.com; mikeldrew at aol.com
> CC: detomaso at poca.com
> Subject: Re: [DeTomaso] Cylinder Heads leaking
>
> I just buy a roll of gasket material and cut my own. Never any leaks
> and easy to do.Mark
>
>
> On Friday, November 20, 2015 7:30 PM, sean mundy
> <seanmundy at hotmail.com> wrote:
>
>
> Thank you Mike. That explains a possible oil leak being sucked in
> via a leak but that wouldn't account for me hearing air leaking
> when pumping air into the cylinder with both valves closed? I have
> CHI heads and CHI intake and I'm using their specific intake gasket
> set. I don't think the stock gasket is going to match up all that
> well. > CC: detomaso at poca.com > From: MikeLDrew at aol.com > Subject: Re:
> [DeTomaso] Cylinder Heads leaking > Date: Fri, 20 Nov 2015 16:12:19
> -0800 > To: seanmundy at hotmail.com > > Sean, > > This is a VERY common
> problem. Your intake manifold gasket has failed and is leaking on
> the bottom edge, allowing oil to be sucked from the valley under the
> intake into one or more cylinders. > > Many people have made the
> mistake of using Fel-Pro 'Print-o-seal' intake gaskets. These things
> are notorious for failing; so much so that you can find numerous
> references to them on Internet forums for all sorts of cars, where
> they are commonly called 'Print-o-leak' gaskets! > > I happen to favor
> the stock-style valley pan gasket, Fel pro MS96012. If you follow
> the installation instructions to the letter, these seal fine with
> the added advantage of cooling the underside of the intake by
> shielding it from oil splash. > > There is a story with photos about
> this chronic problem in a recent PCNC newsletter; you can read it by
> accessing the website at www.panteraclubnorcal.com > > I've helped
> repair two local cars with this problem in the past few months and
> know of a third that is awaiting repair.... > > Mike > > > > Sent from
> my iPhone > > On Nov 20, 2015, at 15:42, sean mundy
> <seanmundy at hotmail.com> wrote: > > > After a long hiatus, I am back
> working on my Pantera. Latest issue is > > the engine is burning oil
> at about a quart every 300 miles. > > My spark plugs don't look
> horrible but something is going on. I re > > torqued the cylinder
> heads and intake manifold and made sure my pc > > valve was working. I
> looked at my intake valves with an > > inspection camera and there is
> a lot of carbon buildup but I only have > > about 2k miles on the
> new aluminum heads. I thought my valve seals may > > be leaking so I
> started removing the rockers on one side and tried to > > replace
> the Teflon valve seals on #8cyl with new Comp Cam Viton seals. > > I
> connected compressed air to the #8 spark plug hole to hold the valve
> > > up so I could remove the spring. I don't think you are supposed to
> > > but I can hear air leaking from somewhere inside the engine. It
> seems > > like I can feel a little air coming out of the top of the
> intake > > manifold with my carb removed. I can't trace the air leak.
> > > Need some tips on what steps I should take at this point.
> Thanks, Sean > > _______________________________________________ > >
> > > Detomaso Forum Managed by POCA > > Posted emails must not exceed
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> by POCAPosted emails must not exceed 1.5 MegabytesDeTomaso mailing
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> manage your subscription (change email address, unsubscribe, etc.) use
> the links above.
>
>
> I tried pumping air into 7 and 8 spark plug holes and both I can hear
> air leaking. I have all my rockers removed on that side so all the
> valves should be closed. I've tried a few different types of gaskets
> but buying the CHI specific ones seemed to be the best approach. They
> fit perfect so I hoped my valve seals were the problem especially since
> there is a lot of blue smoke on startup after the car has been
> sitting awhile. I re torqued the heads thinking the air leak could
> only be either the valves or a leaking head gasket. I have no signs
> of coolant in my oil. Maybe I have multiple problems ?
> __________________________________________________________________
>
> Date: Sat, 21 Nov 2015 00:52:12 +0000
> From: ehpantera at yahoo.com
> To: seanmundy at hotmail.com; mikeldrew at aol.com
> CC: detomaso at poca.com
> Subject: Re: [DeTomaso] Cylinder Heads leaking
> I just buy a roll of gasket material and cut my own. Never any leaks
> and easy to do.
> Mark
> On Friday, November 20, 2015 7:30 PM, sean mundy
> <seanmundy at hotmail.com> wrote:
> Thank you Mike. That explains a possible oil leak being sucked in
> via
> a leak but that wouldn't account for me hearing air leaking when
> pumping air into the cylinder with both valves closed? I have CHI
> heads and CHI intake and I'm using their specific intake gasket set.
> I
> don't think the stock gasket is going to match up all that well.
> > CC: [1]detomaso at poca.com
> > From: [2]MikeLDrew at aol.com
> > Subject: Re: [DeTomaso] Cylinder Heads leaking
> > Date: Fri, 20 Nov 2015 16:12:19 -0800
> > To: [3]seanmundy at hotmail.com
> >
> > Sean,
> >
> > This is a VERY common problem. Your intake manifold gasket has
> failed
> and is leaking on the bottom edge, allowing oil to be sucked from the
> valley under the intake into one or more cylinders.
> >
> > Many people have made the mistake of using Fel-Pro 'Print-o-seal'
> intake gaskets. These things are notorious for failing; so much so
> that
> you can find numerous references to them on Internet forums for all
> sorts of cars, where they are commonly called 'Print-o-leak' gaskets!
> >
> > I happen to favor the stock-style valley pan gasket, Fel pro
> MS96012.
> If you follow the installation instructions to the letter, these seal
> fine with the added advantage of cooling the underside of the intake
> by
> shielding it from oil splash.
> >
> > There is a story with photos about this chronic problem in a recent
> PCNC newsletter; you can read it by accessing the website at
> www.panteraclubnorcal.com
> >
> > I've helped repair two local cars with this problem in the past few
> months and know of a third that is awaiting repair....
> >
> > Mike
> >
> >
> >
> > Sent from my iPhone
> >
> > On Nov 20, 2015, at 15:42, sean mundy <[4]seanmundy at hotmail.com>
> wrote:
> >
> > > After a long hiatus, I am back working on my Pantera. Latest
> issue
> is
> > > the engine is burning oil at about a quart every 300 miles.
> > > My spark plugs don't look horrible but something is going on. I
> re
> > > torqued the cylinder heads and intake manifold and made sure my
> pc
> > > valve was working. I looked at my intake valves with an
> > > inspection camera and there is a lot of carbon buildup but I only
> have
> > > about 2k miles on the new aluminum heads. I thought my valve
> seals
> may
> > > be leaking so I started removing the rockers on one side and
> tried
> to
> > > replace the Teflon valve seals on #8cyl with new Comp Cam Viton
> seals.
> > > I connected compressed air to the #8 spark plug hole to hold the
> valve
> > > up so I could remove the spring. I don't think you are supposed
> to
> > > but I can hear air leaking from somewhere inside the engine. It
> seems
> > > like I can feel a little air coming out of the top of the intake
> > > manifold with my carb removed. I can't trace the air leak.
> > > Need some tips on what steps I should take at this point. Thanks,
> Sean
> > > _______________________________________________
> > >
> > > Detomaso Forum Managed by POCA
> > > Posted emails must not exceed 1.5 Megabytes
> > > DeTomaso mailing list
> > > [5]DeTomaso at poca.com
> > > [6]http://poca.com/mailman/listinfo/detomaso_poca.com
> > >
> > > To manage your subscription (change email address, unsubscribe,
> etc.) use the links above.
> _______________________________________________
> Detomaso Forum Managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
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> To manage your subscription (change email address, unsubscribe, etc.)
> use the links above.
>
> References
>
> 1. mailto:detomaso at poca.com
> 2. mailto:MikeLDrew at aol.com
> 3. mailto:seanmundy at hotmail.com
> 4. mailto:seanmundy at hotmail.com
> 5. mailto:DeTomaso at poca.com
> 6. http://poca.com/mailman/listinfo/detomaso_poca.com
> 7. mailto:DeTomaso at poca.com
> 8. http://poca.com/mailman/listinfo/detomaso_poca.com
>
> _______________________________________________
>
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