Hi I did a full engine flush the other day, from the block/thermostat and I'm a little worried as it only took 5 litres to fill and that was roughly about what came out, but I have read its supposed to take 13.7 litres. The pipe from the block to the rad gets hot quickly and the pipe expands to its max, if you drive the car and leave it to stand all day, it doesn't go down much.


Secondly I have a load hum/juddering/vibration through out the car when turning slowly left. It does do it right hand down but not as bad. Could it be the front or back Diffs maybe.


Help greatly needed and appreciated before I manage to kill my Jeep,


Thanks

 

Year
Engine
Transfercase
Lifted?

 

Hi it's a 2002 grand jeep cherokee. 4.7 Ho quadra-drive, no modifications, thanks

 

I highly doubt your vibration is caused by the diffs, inspect the tires and front axle joints.

 

Your coolant flush only took 5 liters because the block wasn't drained. There are plugs in the sides of the block for this purpose. Whatever was in there before is still in there mixing with the new stuff.

 

Hi thanks for you mail, I did remove the thermostat I thought that would empty most of the water ??

 

Lots of water stays trapped in the block unless you remove the plugs on the side of the block.

 

O dear that's where I've gone wrong then, I just thought the stat would be enough any tips on the best way to drain it all then, is there specific sequence cheers

 

just run and empty/refill it with water till the water is coming out clean, the fill it with antifreeze. The water in the block would be clean if you empty/refilled it enough times. Chrisfix on YouTube has a video on it.

 

Hi well Ive changed the rear diff oil and I'm a bit worried about what I saw, I'm hoping its nothing to bad. Instead of trying to explain ive taken a short video, I hope the link works, Cheers Jase

 

are there any teeth missing off pinion or spider gears? Any metal pieces when you drained it? Maybe the guy before you broke something and fixed it but used the same old carrier or somthin.

 

There was metal based sludge stuck to the magnet, but not anything with real body ie swarf, shavings etc, cheers