Heater

Heater was optional in the Standard model for most countries. All USA models came with a heater (by law).

Overview

Coolant Flow to Heater

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/cooling/CO-01_01.jpg

Heater Hose Dimension ID: 13mm OD: 18mm

Radiator hose inlet ID: 22.5mm OD: 27mm(flare 29mm) Diameter at block end: 26mm Length: 162mm

Heater hose inlet ID: 14mm OD: 16mm(Flare 17.5mm)

Album 20399

Australia Assembled

Australian-assembled B110 used a Nissan heater by Smiths. The front cover is fastened with screws instead of clips like the Japan-made heater. The electric are on the opposite side and it uses a different #Heater Cock valve.

Post 485790 Post 485790

Post 485790 Post 485790

Operation

1972 USA Owners manual

[[1972#29378|]]18   [[1972#29379|]]19

Comfort and Convenience

TIP: Pull heater level out to switch fan speeds.

See also: Ventilation

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/27011-H1000.jpg https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/27011-H1000_.jpg Album 18712 Album 7561 Album 7562 Album 14595 Album 20399 Album 21272 Album 27137

PUSH control knob 27017-G1000

Upload click to view

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/27011-H1000-.jpg

Heater Inspection

Heater core:

• Leaks (before removing, check for leaks in passenger area, under carpet, on firewall cardboard, etc)

• Flow (ensure it is not plugged). You can test similar to |radiator blocked test

• Clean out debris in exterior of core

Hoses: Check for cracks, overly soft hoses, tight clamps

Flow valve: ensure it opens & closes easily through entire range. Also check linkage for easy and complete movement (before taking apart)

Air ducts: Ensure they are clean and connected properly

Electrical: Ensure fan spins at both High & Low speed

Coolant Thermostat: Test

Control Mechanism

PULL-FAN (some are blank, others say ('FAN')

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Cluster lid close up around heater section

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TEMP (lever with temp switch), MODE (defrost/heater lever)

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CONTROL ASSY 27130 27135-H1000 JAPAN 27135-H1600 COMP-CONTROL HEATER USA

HOSE 27161-G1000 < 27161-H1001 HOSE-DEFROSTER < 27161-H1000

ヒーター ブロアー スイッチ Heater Blower Switch

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Heater Cock

Album 19456 Album 19455 Upload click to view Upload click to view

Gallery: photo gallery☁

Alternative: 1989-1990 Commodore part from Repco can be used for the hose to this version of the heater cock ^POST non-Japan heater cock

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Part Numbers

Heater cock

• X2160-30600, X2161-30600 ASSY-VALVE WATER CONTROL B110 USA $18 USD

• 27017-B8520 COCK- ASSY-FRONT HEATER 7510- B120

B120 Sunny Truck

Album 18257

B110 Coupe/Sedan

Album 19457

B210 * 27017-H5000 B210 * 27017-N5000 B210 w/Aircon

Compare to other similar units: * Datsun 240Z https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Heatercock70-73240Z.jpg

Core

The heater core is like a small radiator. The heater fan blows air through the core to transfer heat into the passenger compartment.

PART No. 27013 H1000 (12160 30101)

Album 21046

OK No. 1 NIHON RADIATOR CO., LTD. MADE IN JAPAN

with sealing foam attached

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Part Numbers

Same part number 1970-1994 1200 sedan/ute/coupe JDM and USDM markets.

27013-H1001 CORE ASSY-FRONT HEATER

B210 is 27013-H5000, so a different part.

Heater Hoses

The heater hoses are 1/2 inch inside diameter hose. However, the original Nissan hoses were thin wall. Standard 1/2 inch hose is thick wall and will work but has to be forced through the firewall grommets.

Also, the original B110 thin-wall hoses were the braided type like this:

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In this photo the front (long) heater hose is the original braided type, while the rear heater hose connected to the firewall has been replaced with a plain rubber hose.

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Original hose clamps are the wire type. These do not need to be tightened very much; they are only there to prevent the hose from pulling off the metal pipe over the bulged part. These clamps are available from Nissan, but in a pinch, other kinds may be used.

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Outlet (long) heater hose

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Outlet Connector (fits in between the two lower radiator hoses):

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• 27051-E0100 CLIP-WATER (2) [for radiator hoses]

• 08723-12000 CLAMP-HOSE (1) [for heater hose]

Inlet

Inlet connector fitting (back of cylinder head) Fitting thread is 3/8" BSPT

27070-H1000 CONNECTOR-WATER INLET

Post 492928 Post 312907

B140 dual-hose inlet connector T-piece. Heater hose comes from the right, manifold heat from the left.

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B110

Main: Heater Part Numbers

27021-H1000ᴳ HOSE-WATER [to outlet, front of engine] $7.50 * 27078-B2000 CLIP (2) [Fixing hose to air cleaner bracket] * 08510-51012 SCREW-TAPPING (2) * 08915-43510 WASHER-PLAIN (2) 27075-H1000ᴳ CONNECTOR-WATER OUTLET [lower radiator hose T-connector] $9.97 27070-H1000ᴳ CONNECTOR-WATER INLET [rear of cylinder head] $4.13 27020-G1900ᴳ 27020-H1000 HOSE-WATER [from inlet to cock] $9.88 X2160-30503ᴳ HOSE-WATER [from cock to core] $11.13 B7017-B8500ᴳ X2161-30600 X2160-30600 ASSY-VALVE WATER CONTROL $18.17 27363-18200ᴳ 27363-18001 GROMMET-HEATER (2) $0.53 08723-12000ᴳ CLAMP-HOSE (5) $2.40 08723-13600ᴳ CLAMP-HOSE (2) $2.57 [fixing hose to cock]

Complete set is about $80: 21501-H1000,21506-H1101,B7017-B8500,27022-H1000,27020-G1900,27075-H1000,B7021-H1002,27363-18001,01555-00841,01555-00281,27070-H1000

B120

Album 21820 https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/1971/Truck/G27-31a.jpg

Late from Oct 1989 * 92402-95W00 HOSE-FRONT HEATER, 5 [outlet (long) hose] NICHIRA B517 * 27363-18200 GROMMET-RUBBER (2) * 01555-00221 CLAMP (4) 8910- * 92520-G1900 [for rear portion of hose] 08120-61228 BOLT * 92520-G1900 CLAMP 9810- [for strut tower] 08543-61012 SCREW * 27078-B2000 CLAMP [to air cleaner bracket] 08110-61610 BOLT 08911-10637 NUT

B120 early to Oct 1989 * 92402-G1900 HOSE-FRONT HEATER, 5 NICHIRA B517 supercedes 92402-G1601, 92402-G1660, 92402-G1661 * 27363-18200 GROMMET-RUBBER (2) * 08723-12000 CLAMP (3) -8910 * 08723-12200 CLAMP (1) -8910 * 01553-00013 CLAMP -8910 [clamp to hot air tube] * 27078-B2000 CLAMP [to air cleaner bracket] 08110-61610 BOLT * Album 9330 Mid-year B120 1. Inlet hose 4 2. Outlet hose 5 3. Outlet hose connects to block water pipe

B120 Inlet Hose * 27020-H1000 HOSE FRONT HEATER, 4 [inlet (short) hose] 7510-8109 * 27070-H1000 CONNECTOR-WATER RETURN 7510-8109 * 27020-G1900 HOSE FRONT HEATER, 4 [inlet (short) hose] 8110- 27070-H5000 CONNECTOR-WATER RETURN 8110- * 27025 #27022-H1000 HOSE-WATER [core to cock valve]

27022-H1000

In-cabin heater hose, the short hose from the cock valve to the heater core.

* B110 * B120/B121/B122

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44 27025 27022-H1000ᴳ HOSE-WATER [core to cock valve]

Album 22104 http://datsun1200.com/uploads/photos/31416.jpgAlbum 31416 http://datsun1200.com/uploads/photos/31417.jpgAlbum 31417

Alternatively, you can use a Toyota Land Cruiser hose for the small hose from the Heater Core to the Cock Valve

Album 29702

GATES 02-0648 TOYOTA LANDCRUISER All Engines 4L 6CY 1988-1992

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Toyota Land Cruiser 6-cylinder 4liter 1988-1992 (Toyota J60ᵂ) Outlet & Inlet heater hose (rear) GATES 02-0648ᴳ UPC 9314693-356582 ECR+ electrochemical resistant PLUS Inside diameter: 13mm Length: 180mm ?? same as ?? Toyota 87245-90A05ᴳ

B210

By comparison, B210 parts are mostly different to Datsun 1200.

USA B210 REGULAR X9525-30120 HOSE-WATER COCK TO CORE (NICHIRA) 27020-H5000 HOSE-WATER 27021-H6200 HOSE-WATER HEAVY DUTY 27020-H6110 HOSE-WATER 27021-H6211 HOSE-WATER 14801-30503 HOSE-WATER,U TYPE X9525-30082 HOSE-STRAIGHT

JDM Late B210 27020-H5000 HOSE-WATER HEATER 1 27021-H5000 HOSE-WATER HEATER 2

Removal

Heater was optional, so it is not reuired for safe engine operation. If you wish to remove the heater, how is it done?

1. Drain engine coolant

1. Remove heater hose from the fitting behind the cylinder head and plug this fitting with a 1/2" rubber cap

1. Remove heater hose from the lower radiator hose tee. Plug this fitting with a 1/2" rubber cap

1. Remove heater from inside car, & plug the two holes in the firewall

Plugs can be purchased at your local auto parts store. They have a selection - just ask!

1/2" plug

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/Parts/heater_hose_plug.jpg

Firewall plug

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You can either remove the fitting from the back of the head & put a plug in there, or get heater blank off rubbers & plug them both. You can get these from local Auto stores, it is 1/2" heater hose.

00931-30610 PLUG-HEATER OUTLET HOLE Album 20668 Heater hose plug for cylinder head (as fitted to no-heater models)

Fitting thread is 3/8" BSPT.

Or the simpler way: Run a new longer hose from front to back of engine.

The most elegant way: Remove both lower radiator hoses and the heater adapter, and replace with a single-piece lower radiator hose.

buy at Bprojects

Album 21794

http://www.datsun1200.asia/resources/upload/products/thumbnail/radiator-hose-lower-001.JPG☁

Discussion: ^POST A-series heater removal

Heater Bypass

If the heater core is leaking, the easiest fix is to bypass the heater. Connect the long heater hose to the back of the cylinder head.

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You may leave it this way temporarily or permanently -- the engine runs fine either way. Just depends on whether you need the heater for de-misting the windshield.

Alternatives

• Maddat sells a Universal Electric Demister Unit which is smaller than the stock unit, so it can be used with an extra-large tunnel http://www.maddat.com.au/images/products/HDB.jpg http://www.maddat.com.au/images/shop/Other/Universal%20Demister%20resize.jpg

• Universal under-dash heaters Album 6705

• Electric heaters, You can use a ceramic heater element in the original 1200 heater box. Or just plug in an el cheapo acccesory car heater as from J.C. Whitney.

Heater Motor & Fan

See Heater Motor

Wiring

See Heater Wiring

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