My daughter's Kia Reo has a clunk under the passenger side floor board. I suspect a cradle mount for the subframe. Any history of problems?

no dont think so ,jack up both side on the front and have a good look with a crowbar ,sorry prise bar ,i suspect its the antiroll bar bushes on the subframe but without make and model i cannot tell you what to look for ? if the antiroll bar connects to through the lower track control arm then would allow it to move causing the pull to the right ,if a link bar with ball joints used as in a peugeot then it would just clunk .

Check exhaust system
Heat Shield on Converter

sounds like your drainage tube may be clogged look under the hood on the passenger side of the car see if u see the tube if so try to see if u see anything blocking the end

The Subframe is a metal frame like enclosure that surrounds the Engine /Transmission. The Engine/ Trans drops into the Subframe and in turn is bolted to it via Engine Mounts and the Subframe is in turn bolted to the uni-body of your car via Subframe Mounts.

CHECK THE ACTUATOR UNDER PASSENGER SIDE FLOOR BOARD IN DASH THE CABLE COMES OFF FOR TEMP BLEND DOOR I WOULD CHECK THAT IF YOUR COOLANT LEVEL IS FULL SNF YOU HAVE NO LEAKS

The solenoids are under the side pan on the transmission on the drivers side. You will have to go through the drivers side fender well. Remove the wheel, brake caliper, spindle, take the rack and pinion loose, install engine support, place jack under left side (drivers side) of subframe, remove subframe mounting bolts, loosen (do not remove) right side subframe mounting bolts, lower left side of subframe 4 to 6 inchs, go to engine support and lower engine and transmission down just enough so that transmission side pan can be removed. Thanks and good luck with your repairs.

ok this is involved here,,,if youre doing it on the floor you gonna have a harder time,,,there is 2 ways to do this the first gives you more room to swap the clutch but you remove more stuff to gain that extra room,meaning more time,,,,the second is the way i would do it,,,remove the battery and tray,remove the top trans bolts and connectors etc, remove wheels and drivers side axle,you can remove the passenger side axle if you wish,it makes it easier if youre a first timer,,,go under car remove exhaust bolts from where header meets pipe,3, nuts, 13mm header,remove top trans mount and lower trans mount and loosen the passenger side subframe bolts 18mm and take out the 2 drivefrs side subframe bolt,BEFORE you do this suport the engine somehow either with chain and bar from top or jack under it,,the jack sucks as it gets in yuor way,,then slide the trans off the engine over to the side and it should kinda tuck in there you might have to strap it there while you swap the clutch,,,ALSO remove the reverse light switch first so you dont break it trying to tuck the trans aside,,then swap the clutch,,,this is the quicker way but tighter and harder if you dont know what is going on,,the other way is all the same but you remove the lower subframe completely from the car,,this requiresm more work,,,,steering shaft bolt removal,,,lower control arm nuts,etc,you choose

Did you have the windshield replaced recently? This is typically caused by faulty installation of a windshield. Sometimes it can be fixed by adding windshield sealant (polyurethene, not silicone) where the windshield is adhered to the subframe - most likely along the bottom edge.

There are four total mounts.

1. Upper engine mount located on the passenger side of the engine. Get this at the dealer, aftermarket, especially Anchor brand are garbage.

2. Lower engine mount, often refered to as a "dog bone" mount because of its shape. This one is located on the lower passenger side. You'll have to remove some splash shields to get to it. Aftermarket is OK.

3. Upper transmission mount, also refered to as a "dog bone" mount. Located under the battery.Aftermarket is OK.

4. Lower transmission mount. Located under the transmission. As with the top engine mount, dealer is better quality.

The two dogbone mounts usualy last a very long time, its the others that fail over time. Especially the upper one.

Check your motor mounts. I had the same problem and it turned out that the engine cradle (subframe) was rotted out around the drivers side engine mount. I learned that it is a common problem here in New York because of the salt on the roads in the winter.