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Sierra Marine Parts Catalog: Mercruiser

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18-1989
THERMOSTAT HOUSING
18-1994
Replaces: 87290A4, 861006A1
18-1993
THERMOSTAT HOUSING
Stainless Steel
THERMOSTAT HOUSING
Replaces: 87290A4
Use 18-1989K Thermostat Service Kit
Replaces: 78984A01, 861493A3
for replacement parts
For: Stainless Steel version use 18-1989
18-3531
18-3532
18-3530-1
THERMOSTAT HOUSING
THERMOSTAT HOUSING AND COvER
THERMOSTAT HOUSING
Replaces: 861188A1
Replaces: 55131A5
Replaces: 860256A4
Fits: MCM/MIE GM V-6 & V-8 305,350,454 & 502 cid
Fits: MCM/MIE GM V6 & V8, 305, 350, 454, and
engines with closed cooling systems
502cid, engines with closed cooling
For: GM V6 and V8 (305 & 350 ci)
18-1910
THERMOSTAT HOUSING KIT
18-1989K
THERMOSTAT SERvICE KIT
Replaces: 861493A07
Fits: 3.0L GM 1999-Up, S/N 0L340999-Lower
Service Kit for 18-1989 Thermostat Housing
THERMOSTAT APPLICATION
Engine / Model
CID / # CYL
Year
Beginning
Ending
Housing
Thermostat
Thermostat &
Thermostat
Gaskets
Gaskets
Gaskets
Range
Serial #
Serial #
Cover
Gasket Kit
Required
Required - Design II
Required - Design III
roVer
3140000
Up
--
18-3551
--
60
68/L4
1965-1968
1887079
2049044
18-3551
80
80/L4
1966-1969
2049045
2851423
18-3551
90
96/L4
1970-1972
2851424
3226957
18-3557
18-2831
100 VASer
98/L4
2007-2010
w995000
& Up
18-1508
18-3551
110
153/L4
1963-1966
1537370
2044033
18-3551
110
153/L4
1963-1966
1821720
2044033
18-3551
120
153/L4
1964-1972
1666601
3377340
18-3551
120
153/L4
1964-1966
1725593
2046624
18-3551
120
153/L4
1967
2046625
2324346
,
18-3650
18-3550
18-2831
120
153/L4
1968-1972
2324347
3377340
18-3650
18-3650
18-3550
18-2831
120
153/L4
1972-1986
3377341
B531853
18-3650
18-3650
18-3550
18-2831
2.5L
153/L4
1987-1989
B531854
C853255
18-3650
18-3650
18-3550
18-2831
140
181/L4
1968-1986
2508261
B450800
18-3650
140 (6 CYL)
1538930
1725960
--
18-3551
--
18-3650
18-3550
18-2831
3.0L
181/L4
1987-1989
B450801
C856558
18-3650
18-3647
18-3649
3.0L, FWC
181/L4
1990-2010
C856559
Up
,
18-3650
18-3550
18-2831
3.0L
181/L4
1990-1994
C856559
F603999
18-3650
18-3647
18-3649
18-2552
3.0L
181/L4
2000-2010
L341000
& Up
,
18-3650
18-3550
18-2831
3.0L
181/L4
1998-2000
L010042
L340999
18-3650
3.0L MpI
181/L4
2008-2010
A072812
& Up
18-3647
18-3649
18-2552
18-3647
18-3649
3.0L MpI FWC
181/L4
2008-2010
A072812
& Up
18-3647
18-3649
3.0LX, FWC
181/L4
1990-1997
C856559
K999999
,
18-3650
18-3550
18-2831
3.0LX
181/L4
1990-1997
C856559
K999999
18-1910
150
1666495
2048046
--
18-3551
--
160
2048022
2770031
--
18-3551
--
160
2048022
2233574
--
18-3557
--
160
2326069
2770031
--
18-3557
18-2831
165
2770032
5813433
--
18-3650
18-3550
18-2831
165
224/L4
1987
B434941
B774251
18-3667
18-3555
18-2555
165
6916779
Up
--
18-3667
18-3555
18-2555
Design I
Without check ball
160 degree
7-point drain system
Design II
SN 4167000 & Up
Mechanical Throttle Body
For Stainless Steel version use 18-1989
Design III
Original thermostat housing listed as NLA.
Digital Throttle Body
Aluminum Exhaust Manifold
Emission Control Engine
Order update kit 87290A23
Cast Iron Exhaust Manifold
Manual drain system
Original thermostat housing listed as NLA.
Closed Cooling
Air Actuated drain system
Order update kit 90736A24
Standard Cooling
Complete thermostat housing kit kit
Old Design
With check ball
New Design
Single and 3-point drain system
635