Posted by docmirror on February 11, 2020 at 13:39:20 from (192.19.220.253):
In Reply to: f-150 engine durability posted by CenTex Farmall on February 10, 2020 at 23:32:40:
Ecoboost and Duratec 3.5 V6 warning about water pump failure.
These engines have an integral water pump inside the timing end of the engine. It will NOT weep when it fails outside the engine. It must be caught soon or the entire engine will be destroyed. I have two ecoboost engines, and so far ok.
How to check regularly.
1. Hot engine: Shut down, and check dipstick for both level, and color, consistency of oil. If oil level is higher than expected, AND shows milky condition, do NOT run the engine. Tow to shop and replace water pump.
2. Cold engine: Keep track of water level in overflow. If the water level begins to drop, or the 'check water level' indicator comes on when starting, perform the hot engine check for milky or high level oil.
The water pump failure dumps coolant into the crankcase. There is NO air vent for the crankcase. Also can check the inside of the oil fill port for milky froth. Do NOT run the engine to the shop! Have it towed, and you will save thousands over engine replacement.
The ecoboost V6 3.5 is an incredibly powerful engine. If it's run overheated, the chance of water pump failure increases. Plan on proactive water pump replacement at ~ 125k miles. Have the timing chains and tensioner inspected during the water pump job. The chains are micro-polished, and do not replace with aftermarket chains which are just stainless steel, but unpolished.
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