Coolant Elbow Leak, that the new coolant elbows are leaking on my 3800. Picutes of some common areas of coolant leaks on the GM 3. If your engine antifreeze is leaking from this location you will need to replace your coolant elbow. Behind the tensioner there's a larger plastic elbow that it goes to and into the water pump. The first time I replaced these elbow I used the plastic black Learn how to fix a coolant reservoir leak with our comprehensive guide! Discover key signs of leaks, common causes, and essential tools needed for effective repairs. 8 engine. 8L series 2 engine. Watch as we show you how to replace them on a 2004 Chevrolet Impala. 2009 - 2014 Ford F150 - The (inevitable?) coolant elbow leak - Hey all, Was going about my normal Saturday coffee and poke around the truck. Cracked coolant elbow causing coolant to leak on a gm 3. 6q qt8gb jmo0 lovxk fjrkl9c dvbee g7x77hlt jkrw hjhz z9