Coolant Leak from behind Timing chain housing
Discussion
Hello All
My 4.6 serpentine engine is leaking coolant from the gasket between the engine block and timing chain housing. At first I thought it was the Stat housing, which appeared to be leaking due to the amount of red residue beneath the inlet manifould,so replaced the gasket sucessfully. However, after returning home from a test run, left the car parked to clean off flies etc, I noticed a pool beneath the car which was dripping off the chassis members.
After taking off the power steering pump oil feed pipes to get a better view, I traced the leak to the top of the timing chain housing at the point where the long bolts fit right through from the water pump to the engine block. I cannot see any way of fixing this other than to remove the complete housing assembly.
Has anyone experienced this problem, and is it possible to disassemble the front of the engine while in situ ?
Help would be appreciated
My 4.6 serpentine engine is leaking coolant from the gasket between the engine block and timing chain housing. At first I thought it was the Stat housing, which appeared to be leaking due to the amount of red residue beneath the inlet manifould,so replaced the gasket sucessfully. However, after returning home from a test run, left the car parked to clean off flies etc, I noticed a pool beneath the car which was dripping off the chassis members.
After taking off the power steering pump oil feed pipes to get a better view, I traced the leak to the top of the timing chain housing at the point where the long bolts fit right through from the water pump to the engine block. I cannot see any way of fixing this other than to remove the complete housing assembly.
Has anyone experienced this problem, and is it possible to disassemble the front of the engine while in situ ?
Help would be appreciated
The reason its leaking from there is because a couple of those long water pump bolts go straight through into the water jacket. As such they should be assembled with some type of sealant. Rover recommend a certain loctite but i have always used just some liquid gasket on the threads and never had a problem.
I would empty your coolant and then remove the bolt that is leaking and then replace it with some fresh sealant on the threads and hopefully that will re seal it. If water has leaked passed the threads and shown externally it may also have leaked internally so probably a good idea to do an oil change as well.
I would empty your coolant and then remove the bolt that is leaking and then replace it with some fresh sealant on the threads and hopefully that will re seal it. If water has leaked passed the threads and shown externally it may also have leaked internally so probably a good idea to do an oil change as well.
When I replaced the water pump on my pre-serp range rover one of the lower bolts on the pump was very long and too had to be sealed before putting back in. I used some blue Hylomar sealant on the thread. I think that's what it said to use in my workshop manual.
It's been in over a year now and not leaked a drop!
It's been in over a year now and not leaked a drop!
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