Sierra Marine Parts Catalog: Mercruiser
THERMOSTAT HOUSING
Replaces: 87290A4, 861006A1
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
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)
THERMOSTAT HOUSING KIT
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
--
--
60
68/L4
1965-1968
1887079
2049044
80
80/L4
1966-1969
2049045
2851423
90
96/L4
1970-1972
2851424
3226957
100 VASer
98/L4
2007-2010
w995000
& Up
110
153/L4
1963-1966
1537370
2044033
❹
110
153/L4
1963-1966
1821720
2044033
❺
120
153/L4
1964-1972
1666601
3377340
❹
120
153/L4
1964-1966
1725593
2046624
❺
120
153/L4
1967
2046625
2324346
❺
❺, ➂
120
153/L4
1968-1972
2324347
3377340
120
153/L4
1972-1986
3377341
B531853
➂
2.5L
153/L4
1987-1989
B531854
C853255
➂
140
181/L4
1968-1986
2508261
B450800
➂
140 (6 CYL)
1538930
1725960
--
--
3.0L
181/L4
1987-1989
B450801
C856558
➂
3.0L, FWC
181/L4
1990-2010
C856559
Up
❻
❼, ➂
3.0L
181/L4
1990-1994
C856559
F603999
3.0L
181/L4
2000-2010
L341000
& Up
❼
❼, ➂
3.0L
181/L4
1998-2000
L010042
L340999
3.0L MpI
181/L4
2008-2010
A072812
& Up
3.0L MpI FWC
181/L4
2008-2010
A072812
& Up
❻
3.0LX, FWC
181/L4
1990-1997
C856559
K999999
❻
❼, ➂
3.0LX
181/L4
1990-1997
C856559
K999999
150
1666495
2048046
--
--
160
➀
2048022
2770031
--
--
160
➀
2048022
2233574
--
--
160
➀
2326069
2770031
--
165
2770032
5813433
--
165
224/L4
1987
B434941
B774251
165
6916779
Up
--
Design I
❾ Without check ball
♣ 160 degree
➄ 7-point drain system
❶
Design II
❿ SN 4167000 & Up
➅ Mechanical Throttle Body
♥ For Stainless Steel version use 18-1989
❷
Design III
➀ Original thermostat housing listed as NLA.
➆ Digital Throttle Body
❸
Aluminum Exhaust Manifold
➇ Emission Control Engine
Order update kit 87290A23
❹
Cast Iron Exhaust Manifold
➈ Manual drain system
➁ Original thermostat housing listed as NLA.
❺
Closed Cooling
➉ Air Actuated drain system
Order update kit 90736A24
❻
Standard Cooling
➂ Complete thermostat housing kit kit
☞ Old Design
❼
With check ball
♠ New Design
➃ Single and 3-point drain system
635
❽