Page 786 - 2021 Sierra Catalog

768
❶ Design I
❷ Design II
❸ Design III
❹ Aluminum Exhaust Manifold ❺ Cast Iron Exhaust Manifold ❻ Closed Cooling
❼ Standard Cooling ❽ With check ball
❾ Without check ball
❿ SN 4167000 & Up
➀ Original thermostat housing listed as NLA. Order update kit 87290A23 ➁ Original thermostat housing listed as NLA. Order update kit 90736A24 ➂ Complete thermostat housing kit kit
➃ Single and 3-point drain system
➄ 7-point drain system
➅ Mechanical Throttle Body
➆ Digital Throttle Body
➇ Emission Control Engine
➈ Manual drain system
➉ Air Actuated drain system
☞ Old Design
♠ New Design
♣ 160 degree
♥ For Stainless Steel version use 18-1989
Engine/Model
CID/#CYL
Year Range
1989-1994 1989-1994 1995-1996 1996-1997 1996-1997 1998-2001 1995-2001 1995-2001 1996-1997 1996-1997
1969-1970 1983-1986 1990-1994
1994-1998 1999 1999-2005 1990-1993 1993-1995 1996-1997 1998-2001 2003-2010
2010 2010 1990-1992 1990-1992 1993-1996 1996 1993-1996 1996-2001 1996-2001 1990-2001
1977-1982
Beginning Ending Serial # Serial #
D715494 F349999 D715494 F820141 F350000 F820141 F820142 K999999 F820142 K999999 L010003 M024330 F563052 M025999 F563052 M025999 F820000 K999999 F602010 K999999 0C391564 0D715493 0C391564 0F349999 2781129 3042731 4179554 6181046 C849992 F213244 4208730 6218036 6218037 UP 5685394 UP 6170297 UP F213293 L001772 L414639 L601036 L001477 M907127 C878221 F114528 D840650 F802599 F802600 K999999 L017000 M024999 M900146 &UP 0A677429 0D763716 A677429 UP A350340 &UP A350802 &UP C878221 D857199 C878221 D857199 D857200 F350274 F350275 F819619 D857200 F819619 F819620 L674200 F819620 L674200 C577254 M050281 3108723 UP 3108723 4887829 4762210 6218461 4762210 6218461 4762210 6218461 6218462 UP
Housing
❼ ❻ ❼ ❼ ❻ ❼ ❼ ❻ ❼ ❼
18-3678
18-1994 18-1994
❽
❼
❼ 18-3531 ❻
❼
❻
❼
❼
❻
❼ 18-3531 ❻ 18-1994
Thermostat Cover
Thermostat & Gasket Kit
18-3668 18-3646 18-3647 18-3647 18-3647 18-3647 18-3647 18-3568 18-3647 18-3647 18-3646 18-3646 18-3646 18-3668
18-3652 18-3667 18-3652 18-3667
18-3668 18-3647 18-3647 18-3568 N/A 18-3646 18-3651
18-3668 18-3668 18-3647 18-3647 18-3647 18-3647 18-3568
18-3651 18-3646 18-3651 18-3646
18-3668
Thermostat Gaskets Req.
18-3551 18-7173 18-3649 18-2553 18-3649 18-0398 18-3649 18-0398 18-3649 18-2844 18-3649 18-0398 18-3649 18-0398 18-3555 18-0398 18-3649 18-0398 18-3649 18-0398 18-3649 18-2553 18-3649 18-2553 18-3551 18-2553 18-3551 18-2554 18-3551
18-3552 18-2843 18-3555 18-2555 18-3552 18-2555 18-3555 18-2555 18-3551
18-3551
18-3551
18-3551 18-7173 18-3649 18-0398 18-3649 18-0398 18-3555 18-0398
18-1508 18-3649 18-2553 18-3551 18-2553 18-1508 18-1508 18-3551 18-7173 18-3551 18-2553 18-3649 18-0398 18-3649 18-0398 18-3649 18-2844 18-3649 18-0398 18-3555 18-1508
18-3551
18-3551 18-2834 18-3649 18-2834 18-3551 18-2844 18-3649 18-2844
18-3551 18-2553
Gaskets Req. - Design II
18-2552 18-2844
18-0398
18-2844 18-2844 18-2844 18-2553 18-2553
—
—
— 18-2553 18-2553 18-2553 18-2552
18-2844 18-2844
18-2552 18-2844
18-0398
18-2553
18-2917 18-2554
Gaskets Req. - Design III
18-0398 18-0398
18-2917 18-2917 18-0398 18-0398 18-0398
18-0398 18-0398 18-0398 18-0398
18-2914
18-0398 18-0398
18-0398
7.4L MIE
7.4L MIE
7.4L MIE
7.4L MIE
7.4L MIE
7.4L MPI
7.4L MPI
7.4L MPI
7.4LX BRAVO EFI 7.4L BRAVO MPI 7.4L MIE
7.4L MIE
390 MCM/MIE
460
465
470
470
485
488
500
500 (GEN +)
500 EFI
502 MAG
502 MAG EFI
502 MAG MPI
502 MAG MPI FWC 525 EFI
575 GM
575
8.2L MAG
454/V-8 454/V-8 454/V-8 454/V-8 454/V-8 454/V-8 454/V-8 454/V-8 454/V-8 454/V-8
482/V-8 482/V-8 502/V-8
502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8
502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 502/V-8 540/V-8
FWC
MIE
MIE FWC
8.2L MIE
8.2L MIE
8.2L MIE
8.2L MIE
8.2L MIE
8.2L MIE
8.2L MPI
8.2L MPI
500 BULLDOG 888 FORD
888 FORD MCM 898/198 GM
898/198 GM MCM/MIE 898 GM
898 GM
EC FWC
FWC
MIE
MIE FWC
THERMOSTAT APPLICATION (Cont.)
I/O — MERCRUISER - Cooling System
18-1977-1 18-1977-1 18-1977-1
18-1977-1