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- KMP Exhaust Valve Seat T400757
KMP Exhaust Valve Seat T400757
T400757 is a KMP Brand exhaust valve seat for diesel cylinder heads, supplied for head overhauls and valve work.
About this part
Valves, seats, guides, springs and seals work as one system. A worn guide lets the valve wobble and burn its seat, and a tired spring lets the valve float at speed, so these parts are usually renewed together during a head overhaul.
When to replace it
- Blue smoke on start-up from worn stem seals or guides
- Low compression on one or more cylinders
- Burnt or pitted valve faces and seats
- Weak or broken valve springs found on inspection
Before you order
Fit new stem seals whenever the valves come out; they are inexpensive and are the most common source of oil smoke from the head.
Not sure it is the right one? A photo of the old part and the nameplate of the machine it came off is usually all the counter needs to confirm a match.
Questions
Should I replace all the valves or just the damaged one?
On a generator engine that runs long hours, most workshops replace the full set of the affected type so the head wears evenly afterwards.
Specifications
| Part number | T400757 |
|---|---|
| Brand | KMP Brand |
| Range | Valve Components |
Not sure it fits?
Send us the number on your old part, or a photo with the engine or alternator nameplate, and we'll confirm the match.
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