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I'm pretty bored right now so I thought I'd make a small thread about what is probably the best OEM upgrade, longevity wise, one can do to his diesel engine.
If you're planning on or have to replace the headgasket on your hydrolic diesel engine (mid-86 to 92), the metal headgastek from the 1.9TD is the way to go. It will last longer than the standard 1.6 fiber gasket and will also tolerate a lot more boost. Note that I'm talking about the HG from a 1.9TD IDI engine, not a 1.9TDI engine.
Pros
-Better longevity
-Better seal
-Possibility of higher boost
-Possibility of improved waterjackets (explained below)
-Works for hydrolic NA, TD and ECO engines
Cons
-Slightly more expensive
-Possibility of a very slight decrease in compression due to the fact that 1.9TD engines have a larger bore.
-Not suitable for solid lifter engines
Diesel engines use three different headgasket thickness calculated from the factory to provide the required compression ratio. The reason for this is to compensate for the slightly different manufacturing tolerances between engines. Slapping on a thinner HG is not a good idea as it could result in your pistons headbutting your valves.
Stock 1.6 HG thickness
1 hole: 1.53mm
2 holes: 1.57mm
3 holes: 1.61mm
1.9TD HG thickness
1 hole: 1.53mm Part #028 103 383 BH
2 holes: 1.57mm Part #028 103 383 BJ
3 holes: 1.61mm Part #028 103 383 BK
Both HG have the same thickness, if your 1.6 had a 3 holes HG, go with the 3 holes 1.9TD HG. Simple isn't it? Installation and torque procedures are the same as before.
Waterjacket improvement
What's this you ask? Take a look at this pic
![]()
Notice how the 1.9TD HG (top) has more holes between each cylinder. These can be drilled on the head and block to prevent hotspots and help bleed air from the system. The coolant passages are already cast into the head and block but they're not drilled. The bottom HG is from a solid lifter engine and lacks the big oil return hole between cylinder 1 & 2.
For more complete infos on this mod, I suggest you read this thread:
http://www.vwdiesel.net/phpBB/...light=
Modified by Black Smokin' Diesel at 8:29 PM 2-27-2007
If you're planning on or have to replace the headgasket on your hydrolic diesel engine (mid-86 to 92), the metal headgastek from the 1.9TD is the way to go. It will last longer than the standard 1.6 fiber gasket and will also tolerate a lot more boost. Note that I'm talking about the HG from a 1.9TD IDI engine, not a 1.9TDI engine.
Pros
-Better longevity
-Better seal
-Possibility of higher boost
-Possibility of improved waterjackets (explained below)
-Works for hydrolic NA, TD and ECO engines
Cons
-Slightly more expensive
-Possibility of a very slight decrease in compression due to the fact that 1.9TD engines have a larger bore.
-Not suitable for solid lifter engines
Diesel engines use three different headgasket thickness calculated from the factory to provide the required compression ratio. The reason for this is to compensate for the slightly different manufacturing tolerances between engines. Slapping on a thinner HG is not a good idea as it could result in your pistons headbutting your valves.
Stock 1.6 HG thickness
1 hole: 1.53mm
2 holes: 1.57mm
3 holes: 1.61mm
1.9TD HG thickness
1 hole: 1.53mm Part #028 103 383 BH
2 holes: 1.57mm Part #028 103 383 BJ
3 holes: 1.61mm Part #028 103 383 BK
Both HG have the same thickness, if your 1.6 had a 3 holes HG, go with the 3 holes 1.9TD HG. Simple isn't it? Installation and torque procedures are the same as before.
Waterjacket improvement
What's this you ask? Take a look at this pic
Notice how the 1.9TD HG (top) has more holes between each cylinder. These can be drilled on the head and block to prevent hotspots and help bleed air from the system. The coolant passages are already cast into the head and block but they're not drilled. The bottom HG is from a solid lifter engine and lacks the big oil return hole between cylinder 1 & 2.
For more complete infos on this mod, I suggest you read this thread:
http://www.vwdiesel.net/phpBB/...light=
Modified by Black Smokin' Diesel at 8:29 PM 2-27-2007
