![[Datsun 1200 encyclopedia]](/wiki/upload/wiki.png)
| Revision as of 05:58, 8 June 2012 ddgonzal (Talk | contribs) (->Interchange) <- Previous diff |
Current revision racer135 (Talk | contribs) (->Screw-in Plugs) |
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| - | [[Category:Engine Mechanical]] | ||
| Coolant passages are below the intake ports in some A-series [[Cylinder Heads]]. They can be large holes or small holes. | Coolant passages are below the intake ports in some A-series [[Cylinder Heads]]. They can be large holes or small holes. | ||
| = Overview = | = Overview = | ||
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=994 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/modules/myalbum/photos/994.jpg] | + | Water ports keep the bottom of the manifold plenum at a hotspot for complete air/fuel burning, even at low throttle. |
| + | |||
| + | {{Photo|994_.jpg}} | ||
| * A12GX has Four Large coolant holes, one beneath each inlet | * A12GX has Four Large coolant holes, one beneath each inlet | ||
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=4441 http://datsun1200.com/modules/myalbum/photos/thumbs/4441.jpg] | + | *: {{Album|4441}} |
| * Other heads have either no coolant holes, small ones, or a mix: | * Other heads have either no coolant holes, small ones, or a mix: | ||
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=4444 http://datsun1200.com/modules/myalbum/photos/thumbs/4444.jpg] | + | *: {{Album|4444}} |
| * Standard Datsun 1200 heads have no coolant holes on the intake side. | * Standard Datsun 1200 heads have no coolant holes on the intake side. | ||
| + | |||
| + | Water outlet | ||
| + | <br>{{Album|14473}} {{Album|11093}} | ||
| === Interchange === | === Interchange === | ||
| A-series heads will interchange with either dry or wet [[Intake Manifold]] with the following caveats: | A-series heads will interchange with either dry or wet [[Intake Manifold]] with the following caveats: | ||
| * If the intake doesn't have coolant passages, tap the head's coolant ports and install plugs | * If the intake doesn't have coolant passages, tap the head's coolant ports and install plugs | ||
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=4444 http://datsun1200.com/modules/myalbum/photos/thumbs/4444.jpg][http://datsun1200.com/modules/myalbum/photo.php?lid=4848 http://datsun1200.com/modules/myalbum/photos/thumbs/4848.jpg] | + | *: {{Album|4444}} |
| - | * If the intake does, but the head doesn't, cold-weather starting and cold-idle may suffer due to insufficient heat. However, warm-engine operation should be OK. | + | * If the intake has coolant ports, but the head doesn't, it may bolt on without modifications. Idle and low-throttle running may suffer due to insufficient heat. However, heavy throttle operation should be OK. |
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=5758 http://datsun1200.com/modules/myalbum/photos/thumbs/5758.jpg] | + | *: {{Album|5758}} |
| == Port Plugging== | == Port Plugging== | ||
| + | Two methods | ||
| + | * drill, tap and fit plugs | ||
| + | or | ||
| + | * use RTV sealant plugs | ||
| + | |||
| Discussion: [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=52679 H89 water gallery pluging?] | Discussion: [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=52679 H89 water gallery pluging?] | ||
| + | == Screw-in Plugs == | ||
| Directions for plugging the cylinder head with blind plugs: | Directions for plugging the cylinder head with blind plugs: | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=4440 http://datsun1200.com/modules/myalbum/photos/thumbs/4440.jpg] | + | <br>{{Album|4440}} |
| Nissan plug parts | Nissan plug parts | ||
| - | 99996-H1149 STUD & PLUG KIT | + | [[Mikuni_PHH#40mm_Mikuni|99996-H1149]] STUD & PLUG KIT |
| - | You can buy grub screws in many places, most auto shops for example. Measure the hole, tap the mext mm up and screw in a plug. A bit of form-a-gasket, copper seal or anti-seize on the threads will help prevent corrosion. | + | You can buy grub screws in many places, most auto shops for example. Measure the hole, tap the mext mm up and screw in a plug. A bit of form-a-gasket, copper seal or anti-seize on the threads will help prevent corrosion and seizing. |
| + | Nissan Competition head [[A-series_Cylinder_Heads#Competition_Head|99996-H1165]] | ||
| + | <br>{{Photo|99996-H1165b.jpg}} | ||
| + | |||
| + | For the heads with smaller water galleries (H75, H89 etc) use stainless steel grub screws M5x0.8 by 5mm long. Use red loctite to seal and stop any movement. | ||
| + | |||
| + | Make sure the end of the screw is below the sealing surface on the head, and file the surface flat if there's any burrs from drilling/tapping the holes. | ||
| + | |||
| + | == RTV Plugs == | ||
| If your dry inlet manifold comes down far enough to cover the holes, you can use silicone sealer like this: | If your dry inlet manifold comes down far enough to cover the holes, you can use silicone sealer like this: | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=23478 http://datsun1200.com/uploads/thumbs/23478.jpg] | + | <br>{{Album|23478}} |
| <br>This is an easy way to seal it, but coolant may leak when you change the manifold. Just re-seal it each time. By contrast, blind plugs are a one-time semi-permanent solution. | <br>This is an easy way to seal it, but coolant may leak when you change the manifold. Just re-seal it each time. By contrast, blind plugs are a one-time semi-permanent solution. | ||
| - | Used RTV silicone sealer. After fitting the intake/exhaust gasket, before fitting the intake manifold, press some RTV into the water ports, the put a button of goo over it. Let it tack up slightly before fitting the intake. | + | Used [[RTV]] silicone sealer. After fitting the intake/exhaust gasket, before fitting the intake manifold, press some RTV into the water ports, the put a button of goo over it. Let it tack up slightly before fitting the intake. |
| + | |||
| + | {{Album|4848}} | ||
| + | |||
| + | [[Category:Engine Mechanical]][[Category:Cooling System]]{{End}} | ||
Current revision
Coolant passages are below the intake ports in some A-series Cylinder Heads. They can be large holes or small holes.
Contents |
[edit]
Overview
Water ports keep the bottom of the manifold plenum at a hotspot for complete air/fuel burning, even at low throttle.
- A12GX has Four Large coolant holes, one beneath each inlet
-
- Other heads have either no coolant holes, small ones, or a mix:
-
- Standard Datsun 1200 heads have no coolant holes on the intake side.
Water outlet
[edit]
Interchange
A-series heads will interchange with either dry or wet Intake Manifold with the following caveats:
- If the intake doesn't have coolant passages, tap the head's coolant ports and install plugs
-
- If the intake has coolant ports, but the head doesn't, it may bolt on without modifications. Idle and low-throttle running may suffer due to insufficient heat. However, heavy throttle operation should be OK.
-
[edit]
Port Plugging
Two methods * drill, tap and fit plugs or * use RTV sealant plugs
Discussion: H89 water gallery pluging?
[edit]
Screw-in Plugs
Directions for plugging the cylinder head with blind plugs:
Nissan plug parts 99996-H1149 STUD & PLUG KIT
You can buy grub screws in many places, most auto shops for example. Measure the hole, tap the mext mm up and screw in a plug. A bit of form-a-gasket, copper seal or anti-seize on the threads will help prevent corrosion and seizing.
Nissan Competition head 99996-H1165
For the heads with smaller water galleries (H75, H89 etc) use stainless steel grub screws M5x0.8 by 5mm long. Use red loctite to seal and stop any movement.
Make sure the end of the screw is below the sealing surface on the head, and file the surface flat if there's any burrs from drilling/tapping the holes.
[edit]
RTV Plugs
If your dry inlet manifold comes down far enough to cover the holes, you can use silicone sealer like this:
This is an easy way to seal it, but coolant may leak when you change the manifold. Just re-seal it each time. By contrast, blind plugs are a one-time semi-permanent solution.
Used RTV silicone sealer. After fitting the intake/exhaust gasket, before fitting the intake manifold, press some RTV into the water ports, the put a button of goo over it. Let it tack up slightly before fitting the intake.
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