Just a short video of my engine partially taken apart.
I had to change the intake gasket.
This was actually my first time tackling a job like this and it was actually really easy.
So if you have a 3800 engine and need the lower gasket replaced do it yourself and don't pay the dealer. I was a total noob at it and pulled it off just fine =)
While it was apart I went ahead and installed an Intercooler.
I figure since its already apart an Intercooler would be easy to put in at this point =)
Buick 3800 Bearings or Lifter or Rod Knocking with Valve Covers Off
Here is a longer video of the 1990 Buick Lesabre with major engine trouble.
Hopefully this can be of use if someone can definatively identify the
issue so that others who have a similar situation know what is going on
with their engine. As for me, I know this engine is trashed. A new one
will be arriving soon for the amount of $150 :)
GM 3.8 Intake Manifold replacement. Removal the fast way WITH NOTES
this is the "Flat Rate " way to do a 3.8 liter upper and lower intake
manifold set. as you see it is not necessary to take off he serp belt,
alternator or tensioner assembly to remove the lower manifold. I recomend
having someone help when it is time to reinstall the manifold because it
can be tricky to lien up the coolant elbow and not mess up the lower
gaskets when reinstalling. Note that it is recomended to disconnect the
negative battery cable when doing any major repairs. This video is just to
show some guys that said that a lower manifold cant be pulled in way less
than 20 minutes, I know that I went over that , but I had some stuborn
injectors and Im a little out of practice. If you are going to do this
yourself and you are not a professional I recomend that you follow the
procedure in a service manual
2000 Grand Prix GT 3800 Series 2 Head Gasket Problem.
Ok update: The problem was a cracked lower intake manifold. Surprisingly
the upper intake was fine. The EGR passage wasnt in bad shape at all. It
was still sealed. But the lower intake was sucking oil and water in the
3800 Series 2 Modding Basics
Mods and Vendors list
Short Stack Intercooler
UD Water Pump Pulley
UD Alternator Pulley
Solid Motor Mounts
3 Inch Downpipe
Shortened Dog Bones
Rear Strut Tower Brace
Aeroforce Scan Gauge
3 gauge Pod
Throttle Body Heat Shield
Throttle Body Spacers
Ebay user "American Superchargers"
Modular Pulley System
All other parts not listed were purchased at various auto parts stores,Ebay
users I dont remember and Walmart.
1999 Bonneville SLE with L26 manifold
L26 UIM swapped onto an L36.
A friend and I spent some quality engine modding time. We swapped out the
lower intake manifold for a ported and polished one, and the upper intake
manifold is now the aluminum version from the Series 3 3800. There is a
custom throttle body adapter plate with a Series 2 supercharged 3800
throttle body. Rice pipe to conical K&N air filter make up the rest of the
air intake. Everything else is stock.
3800 Lower Intake fix
Just some nuggets of wisdom for fixing a leaking lower intake gasket on a
GM 3.8L Series 2 V6.
How to change a thermostat on a GM 3800, the fastest way
This is the way I like to change the thermostats on the 3.8 liter engines.
The main difference is how I manage getting the cooling system "drained" to
swap it out. It saves quite a bit of time.
This applies to any GM 3.8 L / 3800 Series I II III (One, Two, or Three) 1,
2, or 3.
L36, L26, L67, L32
Common vehicles with the 3800:
Pontiac: Grand Prix, Bonneville, Firebird
Chevy/Chevrolet: Impala, Monte Carlo, Camaro
Buick: Regal, LeSabre, Park Ave, Century, Riviera, Reatta
HOW TO CHANGE THE SUPERCHARGER OIL ON A GM 3800 SERIES II V6
just a quick instructional video of how to properly change the Supercharger oil on your 3800... some people say
just to re-top off your Supercharger,
but many owners as well as a good number of master mechanics ive talked to
about it that worked on these cars, they say to full out replace it by
draining it and putting new oil in, simply because if you know anything
about oil youd know that it breaks down over time especially because of
heat and friction. new oil handles it better and keeps it properly
lubricated and cooler temperature. old oil will be dirty, maybe burned,
and possibly ineffective if broken down enough over time. which method you
trust is up to you, im not saying either method is right or wrong, this one
just makes more sense to me, therefore thats the one i do on my car so we
made the instructional video for this, if you choose simply to top off your
oil, do all the same steps just dont empty the old oil first.
Removing the engine on my 97 Riviera
Pulling the knocking 3800 supercharged out of my Riviera to make way for
the replacement engine. Came out relatively easy thanks to the engine
wiring for the most part is one harness that unplugs at the firewall.
Everything is in that harness except the starter, alternator and speed
sensor wiring. The AC compressor and power steering pump unbolt and can be
left in the car so you don't have to drain the fluid/refrigerant. The
biggest pain was getting the axis motor mount off, the bolts were pretty
rusty. The ironic part is those bolts have to be removed to change the
belts, which are so cracked and chipped I wouldn't doubt they are original.
The old engine will either be used for parts, or I may rebuild it at some
HELP! Engine Knocking Noise 3800 Series II
Can anyone confirm this noise? Happened after a 2 hour highway trip. Oil
and Filter change the day before, and Lower Intake Manifold Gasket replaced
about a week prior. It did at one point seize the engine, however a couple
of days later it turned over with plugs removed, and fired up fine right
after they were placed back in. Still making this same noise, as it did
before it locked up. 240,000 KM on the car and engine.
GM 3800 Series II Supercharged Intake Manifold Leaks
This is an all too common problem with supercharged 3800 series engines.
GM used a plastic lower intake manifold gasket that would break down over
time causing coolant to leak into the oil. If left unfixed, it would get
worse to the point where your engine starts knocking from poor lubrication.
Your oil will look really milky as a result. This engine had only 60k
miles on it when I replaced these gaskets and its a good thing I did. GM
makes a newer revision aluminum gasket set that fixes this problem. You
can get those from a GM dealer, they are the set that has locating pins,
the stock ones did not, but these do fit fine.
3800 V6 Upper Intake Swap Part 2-3
Got sick of leaking coolant so I replaced my VIN K 3800 plastic upper
intake swap with a metal one from a L26 3800 Series III (VIN 2) V6. Crappy
video quality, filmed at night. Will re-do tomorrow if there are
sufficient views to warrant it.