![]() ![]() It’s an internal fracture around the exhaust-to-turbo port, so it can’t be repaired. If it looks like head gasket failure – steam billowing out of the back – it’s probably coolant coming from a crack in a water jacket in the cylinder head, and straight through the turbo. Aside from blown pistons, blue smoke suggests turbo wear – often at high revs, especially on hard-worked car, or at idle if the car has a de-cat pipe oil blows past the turbo seals due to the basic breather system, but uprated breathers are available. Bear in mind that could be detrimental to the ST250’s driveability, which should be responsive from 2000rpm.īeware of smoke from the exhaust. It’s also worth bearing in mind the ST’s 2.0-litre EcoBoost is a better cylinder block than the Focus RS’s 2.3, and is often used for big-power builds.įorged pistons and rods are the best solution, being cheaper than standard Ford parts, replaceable with the engine in situ, and available with lower compression ratio than the regular 10.0:1 if you plan on fitting a big turbo. But, although it’s unwise to put undue load on the engine in high gear/low revs, Collins has never seen any issues on an unmodified ST250. ST forums will tell you bad driving and LSPI (low-speed pre-ignition) are to blame. Heavy knocking noises at start-up are another sign of piston problems, but don’t worry about a light tapping at idle, which is typical of the stock fuel injection system. Beware of PAS problems, which mean a new steering rack is required, along with big bills.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |