Hi Again, Well I got the upper plentium off the engine. Can't see any
cracks in the plastic or tracks like water leaves when leaking. I see the
gasket looks undamaged but I know there was a leak there. Mabey it's one of
those leaks you can't see with the naked eye.
Anyway is it possible to just change the gasket? or not feaseable. Anybody
I ask this because time dosen't mean that much to me cuz I'm not on the
clock. Mabey they use a proccess that is not feaseable to do for the home or
shop machanic, don't know but it don't hurt to ask right? Any advice would
1995 buick Le Saber 3.8 L "L" engine.
Did a previous owner perhaps already change this plenum? If you plan to
car, and if it has the old plenum still in it, I would upgrade it while I
had it open.
Ian (Shiden Kai) has mentioned kits to do the upgrade, which, I believe,
installation of a metal sleeve in the plenum. There is a website, in Canada
for this upgrade, but last time I checked they did not take individual
Otherwise, the new and improved plenums here went for a little over US$150
at last check.
The possibility of a leaking gasket may also be the case, and you would have
go below the plenum, IIUC.
I suspected that might be the case. I researched this once before and found
that there was some variation about when certain models may have gotten
the Series II.
In this case, then, to the OP, it is not strange that you have not seen the
to be a problem. The Series I did not have this issue.
But the Series I DID have shitty manifold gaskets.
I'm not shure what you mean " go below the plumem IIUC"
Actually belive it or not- I bought it from a little old lady when it had
63,000 miles on it. from the looks of everything else it probably hadn't
There ARE metal sleeves in the holes where the bolts attach it to the engine
if that indicates anything.
I looked the whole thing over with a magnifing glass - couldn't see any
cracks. Can one just change the gaskets? Or is that not wise. I will change
all the gaskets in the injectors and fuel rail just for GP.
No anti-freeze in the oil but I will change it and filter anyway before I
start it up again.
Thanks again for the replys, Tom
Tom, your car apparently does not have the Series II engine, therefore the
plenum problem does not apply.
New gaskets would be the way to go, IMO.
I have a Series I engine on the engine stand now, and the old gaskets, while
leaking when I pulled the engine apart, looked like they should have been.
These are the gaskets between the manifold and the head, not the head
Is this what you meant? It looks to me like you mean remove the lower
intake manifold from the heads too. is that correct?
The leak looked like it was high up on the engine right about where the
plastic plenum meets the lower one or even higher like where the throttle
body meets the plastic one.
Not having done this before I am seceptible to optical illusions here. Could
it be the lower was leaking and looked like the upper? I do know water flows
downhill like other things but mabey the air movement from the fan made it
go higher than the leak I suppose. Anyway I will know when it goes back
together. I hate to mess with the lower if I don't have to. But you
gotta do what you hate sometimes, lol Thanks, Tom
Tom, if I can get the chance, I will try to go out and photograph the engine
pieces I have. We have had a rather tumultuous time lately, with
critical health issues, but if I can do it tomorrow, I will. Will have to
find a place to
post the pictures.
If at all possible, it is best to identify the leak source before tearing
I have a Series I down to the bone, maybe I can make some photos that will
Went to the local auto parts store and got a set of gaskets yesterday for
the upper plenum and fuel rail and picked up a new thermostat for good
I got the upper plenum in the basement now to replace them. But it just
dawned on me that there are 2 pieces to the plenum area. When i removed the
plastic plenum there was another piece underneath it- a little smaller but
fits inside it. The thing is- when looking at some pics of plenum on NAPA
site they don't mention that second part. I will have to do a little more
looking I guess to see whats up with that. It's supposed to storm tonight
mabey more than a foot of snow sooo.. everything will be on hold for a bit
seeing as I'm doing this outside. Again I hope everything turns out well
for your family.
I have the photos for you, Tom, and will email them privately. See if your
setup looks like this one. Should be self explanatory.
On family, so far so good. It looked like father-in-law was a goner, but
they got him stabilized the the ER, and things are settling back down.
for your wishes.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.