Intercooler
Where the 951's intercooler sits, what it does and why an oil film inside is not an immediate alarm.
In short: The 951 has an air-to-air intercooler under the nose panel. A light oil film in the pipes is normal, but it should not build up.
Position and effect
The intercooler sits under the nose panel between the headlights and lowers the temperature of the compressed air considerably (value in the table).
Oil in the intercooler
A light oil film in the charge-air pipes is normal. If it builds up, efficiency drops, so occasional cleaning makes sense.
Leaking pipes
Leaking hoses and clamps between charger, intercooler and throttle body cause low boost. They come first on the list when diagnosing (see the boost and wastegate article).
Technical values
Only work with the workshop manual and the correct tools. Do not use unverified values without checking them – wrong tension values can destroy the engine.
| Value | Figure | Condition | Status | Source |
|---|---|---|---|---|
| Reduction of charge-air temperature | about 135 °F | – | unverified | [1] |
Sources
- Secondary source 944 Turbo (951) FAQ
Secondary source on the Turbo: charger, boost, wastegate, model years. Some figures quoted from the workshop manual, unverified here.