What is the L67 (Series I)?

The L67 engine began as the Series I Supercharged, one of the last versions of the long-running 3800 series of Buick engines that originated back in 1962 when the car maker unveiled one of America's first V6 engines, the 198 cid "Fireball". The design was created by chopping two cylinders from their innovative all-aluminum 215 V8 block. Since that time, the engine has evolved into the supercharged 231 cid (3.8 L) version that was used in various GM vehicles from 1992-1995. The Series I made 225 hp for 1994-95, and was replaced by the Series II beginning in 1996.

The history of the 3800 is significant because, due to the fact that it still uses older push-rod technology vs. the now common OHC (overhead cam) designs, the L67 makes a lot of low end torque for its physical size. Combine the fat torque curve with a supercharged induction system, and you have a powerful engine that can be made more powerful for relatively little money. On top of that, you can still have decent fuel economy, reliability, and drivability that is comparable to a completely unmodified engine.

The L67 was optional for the '95 Riviera, and was also offered as an option for the Buick Park Avenue, Oldsmobile 88 LS/LSS, Oldsmobile 98, and Pontiac Bonneville SLE/SSE. It was standard for the Bonneville SSEi. The Riviera is a G-body, a platform shared with the Oldsmobile Aurora, Buick Park Avenue, and Pontiac Bonneville.

Some performance engine parts designed for the Series II will fit the Series I, but there are many differences between the two, most noticeably the M62 blower used on the Series I vs. the M90 used on the Series II. There is still plenty of research needed to be done in this area.

Hello, new guy here.
I have a 95 Riv S\C, And am in need of a engine. Are there anh other GM cars I can take an engine from, or does it have to be from another riviera ? Also does the engine have to be S\C for me to use,
Thanks you guys, this is a great forum, seems like you guys know a lot about these cars.

thanks again, D-Nice

You should be able to use any SC 3800 Series 1 motor from another GM. Bonnevilles and Park Avenues are good donors.

You could convert to a non supercharged motor, however there would be some wiring differences as well as a different pcm.

thanx alot BillBoost37

Don't thank me until you have the backwards bolt out and then back in.

It's going to be ALOT easier to swap motor for motor if you can even though the others would work.

According to Hollander....

1995 Bonneville, Eighty-Eight, Ninety-Eight and Park Avenue supercharged engines will fit, as will the non-supercharged engines though you may have to swap the intake manifold and flywheel.

The non supercharged engines have different rods, pistons and heads. The block is the same though.

What supercharger model is in Riviera -95? Is it Eaton M62 or M90?

Thanks in advance.

Johannes.

'95 has the M62.

Thank You.
Johannes

The 95 Riv has the Third Generation M62 supercharger. It has the Epoxy coated rotors and displaces 1 litre of air per revolution. The M90 displaces 1.5 litres of air per revolution. You can tell if the M62 supercharger you are looking at is a second or third generation by looking at the ridges that go across the top of the housing. The second generation has ridges that go all the way down the side, whereas the third gen (found in the riv) they ridges stop part way down. Also the third gen M62 found in the riv has a 2.8" stock pulley size where the second(being less efficent) has a 2.55" stock pulley.

So in short, the 95 ric has the Generation 3 Eaton M62.

edit: ah not fast enough.. lol

What mods can be interchangeable between series 1 & 2?

Its really eaiser to say what does not work between the two:
Headers
After market Fuel Rails
cam
rockers(unless specifically designed for series one)
supercharger modular pulley
transmission stuff


ones that work( or are the same):
SC coupler replacement
fuel filter
after market intake(FWI, CAI)
Thermostat
shocks/struts
sway bar
and most of the normal maintence things work between the two

The major differences are that the injectors are in the lower intake manifold one the series one, vs in the engine heads for the series 2, the exhaust ports are strangely spaced on the series one making headers a custom only option, the SC and LIM are compleatly different one from the series 2, and none of the transmission mods that are out for the series 2 will work on the 4t60e transmission of the series one.

Good threads on series one stuff:
https://rivperformance.editboard.com/series-i-engine-transmission-f13/ideas-for-95-sc-t4832.htm
https://rivperformance.editboard.com/series-i-engine-transmission-f13/series-1-performance-mods-t4618.htm
https://rivperformance.editboard.com/series-i-engine-transmission-f13/what-s-the-difference-t3262.htm
and on the superchargers:
https://rivperformance.editboard.com/info-reference-f50/differences-in-superchargers-t1763.htm?highlight=article

AA wrote:

The L67 engine began as the Series I Supercharged, one of the last versions of the long-running 3800 series of Buick engines that originated back in 1962 when the car maker unveiled America's first V6, the 198 cid "Fireball".

Actually, GMC started building their proper 60-degree V6 in 1960...
http://en.wikipedia.org/wiki/GMC_V6_engine

Eldo wrote:

AA wrote:

The L67 engine began as the Series I Supercharged, one of the last versions of the long-running 3800 series of Buick engines that originated back in 1962 when the car maker unveiled America's first V6, the 198 cid "Fireball".

Actually, GMC started building their proper 60-degree V6 in 1960...
http://en.wikipedia.org/wiki/GMC_V6_engine

ah yes, but that wasn't called an L67 or a buick...

I stand corrected. GMC was first to make a V6!

so much fuss to add the words "one of"

Ok, i'll admit im mechanically challanged, but is there an easy method for determining if my 95 Riv is series 1 or 2 engine???

In '95 the supercharged motors are S1, the N/A motor is S2. Does it have a supercharger?

deekster_caddy wrote:

In '95 the supercharged motors are S1, the N/A motor is S2. Does it have a supercharger?

yup, so its a series 1???

TheAviator wrote:

deekster_caddy wrote:

In '95 the supercharged motors are S1, the N/A motor is S2. Does it have a supercharger?

yup, so its a series 1???

yup.

What all did the 3800 series 1 model engine go in.I need a motor.

without more information I have to make some assumptions. 1) that you have a Riv, 2) you have a Series 1 engine and therefor 3) it is supercharged. So your supercharged S1 options are a little slim, but possible to find. pre-96 Park Ave Ultras, Bonneville SE, Some olds (88LS, 98?). got the supercharger as an option.

captain12pk wrote:

What all did the 3800 series 1 model engine go in.I need a motor.

try contacting moradpartscompany.com, on the Dash on the right, among the list of RivPerformance sponsors.