Deutz — Thermostat housing repair
Repair & overhaul
From a Deutz service manual covering: F2L 1011, F3L 1011, F4L 1011. Check it applies to your exact model before use.
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Procedure
- Lift off cover. Remove steel gasket.
- Remove valve plunger housing.
- Take out thermostat together with spring.
- Remove screw plug for valve plunger (heat up screw plug).
- Remove valve plunger together with compression spring.
- Inspect individual component parts.
- Refit valve plunger together with compression spring. Watch bypass bore.
- Spread thread of screw plug with sealing compound Loctite 648.
- Tighten screw plug in accordance with specifications.
- Position new gaskets, steel gasket and additional new gasket.
- Fit cover. Tighten bolts in accordance with specifications.
Tools required
- Screw driver with socket Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Heat up screw plug 150° C
Source: Deutz service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.