Page updated November 6th, 2000
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A very neat way to get more effective oil cooling on a street engine (type 1) is to install a type 4 oil cooler in place of the original type 1 cooler. This applies to the doghouse style fan shroud and cooler only. The type 4 cooler fits right in, with some modifications: - You need to replace two of the 3 cooler mount studs to longer ones. (The ones that hold the cooler to the adapter). - The cooler housing behind the fan shroud must be widened, including the removable pieces (two). Go to PAGE TWO for more, page 2 was written by Eric Huelsmann and offers good pictures of the shroud modifications needed. Thank you Eric for letting me use your page here. That's it! No more mods, and it looks factory built. (if you did it carefully). Some people don't have access to a welder, and this modification can be done with pop rivets instead. But welding is really the way to go, it looks so much better. The following pictures show the different type doghouse coolers you can find. |
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| From left to right:
1) Type 4 with dense "webbing", should be more effective (no test data available) 2) Std Type 4 cooler 3) Std Type 1 cooler 4) Std Type 3 cooler with a pressure sender fitting built into it This should be more effective than the type 1 cooler, despite it's same physical size. No test data available. |
 T4, T4, T1 and T3 |
 Dense/normal T4 |
 Closeup dense/normal |
 Type 1/type 3 |
| I've done this several times, and always with good results. Can't give you any definite numbers as to how many degrees this will drop your oil temperature, but my 1600 street engine doesn't need any external coolers after this mod. (I get maybe 100hp out of the engine). I do this to ALL street engines I build, from the beginning, so I don't have much data with the standard cooler in place. Sorry. I will gladly publish other people's experiences here, email me if you have done this and have before/after numbers to show us. |
Jan Andersson
Hell-Stinky, Finland