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As many of you know, the FWD / AWD engine config has the water pump internally driven off the timing system. When the pump fails, it spews coolant into the oil and destroys the engine if not caught in time. I am fully versed and have read every article on the causes, failures, fixes, and the political views of using such a design.
In this guide, we’ll cover the infamous 3.5/3.7 Cyclone water pump failure issue in detail, going over what causes it, common symptoms associated with it, and how to go about repairing and preventing the issue.
I ran across some information on my Mazda’s (Ford) Duratec 3.7 V6. Looks like the Water Pump is internal to the engine and driven by the timing chain. Any failure by gasket or pump can trash the engine quickly by spilling coolant into the oil.
Some of the most common 3.7 Duratec problems include the water pump, cam phasers, and ignition coils. In this article, I discuss these 3.7 Cyclone issues along with symptoms, replacement, and reliability.
The water pump has a weep hole that will leak coolant out, to an external block channel and if you see this, its time to get it towed in for a change. Also if coolant mixes with the oil you can usually get it towed in for immediate repair, then flush the oil.
The 3.5 and 3.7 found in the Ford Edge, Flex, Lincoln MKX, MKT (and many other models) has an internal timing chain driven water pump which can fail and leak coolant into the oil pan and ruin the engine.
I’ve read all about the flawed design on the 3.5 and 3.7 l Duratec engines from the Edge where the seal fails and puts water into the oil pan. Because it had a transverse mounted engine that put the water pump under the timing cover. Does the 2011+ f150 version of this engine have that issue?
Unrelated to your engine, the water pumps are known to be a problem on the FWD and AWD versions of the Ford 3.7 and 3.5 v6. In that design the pump is driven off of the timing chain and located inside the engine behind the timing cover which is clearly a terrible design.
Water pump failed and it immediately trashed the engine. No warning, noise , coolant leak or any early indicator. Car has been in a Ford dealership for a week now.
They put the water pump inside the engine so that when (not if) when it goes bad instead of dumping onto the ground it releases directly into the engine causing the engine to fail. Or am I missing something here?