toyota truck raditor leaks around top inlet?

Question

I have a 1994 toyota truck.I have had h three silla radiators replaced, and re-replaced in my truck. (taken care of by warranty)

All three times the radiator sprang a leak because part of the seam around the top(passenger) inlet separated (became unwelded).We (the mechanic and I) noticed everytime that the we reved the engine, that the engine would pull (rock),and then push back, (on the radiator hose), and in turn the top inlet of the radiator.This is what the mechanic determined caused the radiator to bust a seam.

The mechanic determined that both the motor mounts were bad, and swapped them (both) out.

Swapping the motor mounts helped, but when we did the "motor mount test" (emergency brake, let of clutch in 1st, and then let off clutch in reverse) the engine still had/has pronounced rock.

Is this a common problem?

Well, the motor mounts helped

Answer 1

I'd go with what Joseph suggested...replace the hose with a longer one to avoid the problem in the future. Hopefully, there's enough room for some slack in the hose. Years ago, Chevy small blocks had a similiar problem that was fixed by attaching cables or chains between the heads and frame to keep the motor from torqueing too far yet still allow the motor to rest on the mounts for less vibration than an actual solid motor mount like racers use....was common to break the left mount.

Answer 2

Never heard of this specific problem with the toy truck. But if you and a mechanic have determined this to be a fact, suggest removing the OEM hose and installing a flexible. This should all the truck engine to move and not load the radiator inlet neck. Good luck..

Answer 3

This is a pretty common issue on the Toyota Trucks with the 22R and 22RE engines. This is one of the factors that contributes to the infamous headgasket failure on a small number of 4 cylinder trucks, Follow the instructions that Joseph P said. You should be alright.

Answer 4

i don't know if it's common or not but that much flex makes me wonder if something isn't preventing the radiator to move a bit , Toyota is not one to try to ignore design defects. is the rad. support square and straight ? are the locating bolts overtightened ? good luck with it .