Also cut a thick piece of cardboard to protect the AC condenser which is in front of the radiator since you will be working close to it. You'll have to remove the radiator and fan so be prepared to drain the coolant. I seem to recall loosening the oil pan a little when I took it apart. When I put everything back together I really cleaned all mating surfaces with the old oil pan gasket and the block and coated it with Toyota FIPG RTV (the best I have every used). I was able to carefully remove the timing chain cover without damaging the oil pan gasket. The timing chain cover gasket was leaking on my truck but it was leaking externally and not into the crankcase. I highly recommend NOT driving the truck when it starts running hot or you will be replacing the head gaskets and possibly the heads. Sounds like your thermostat is sticking closed which could cause overheating and the heater not to get warm coolant. Even being a little low on coolant your truck should not overheat. Since you are losing coolant and from your pics I would say that you probably have a leaking timing chain cover gasket. Also no signs of oil in coolant when looking down into radiator. Drained the oil, no water or coolant drained out first. Side note - no signs of coolant in the oil. Looks like some people have had success jacking the engine from underneath after popping the motor mounts, transmission bolts, and portion of front suspension to remove pan. If this is a TC cover gasket issue, I've been looking online and in manuals on how to do this without having to pull the engine to replace the oil pan gasket at the same time. Or, does this look like something else? I know there are a few other possibilities, hoping for some advice on whether I'm on the right road or not. This has mixed with oil leaking around the pan gasket and coagulated. TC cover is leaking coolant, when the block gets hot and coolant system pressurized coolant rapidly leaks out of the TC gasket (no coolant puddles observed on the garage floor so its not leaking when not in use). Here is my educated guess, and please tell me if what I'm thinking is agreeable based on my aforementioned description and the attached photos. So I look around under the truck again and find some telltale coolant signs around the passenger side of the water pump bolts (see pictures below) and coagulated oil around the lip of the oil pan, where it has been mixing with coolant. I did some research here and other places online to find that a common problem is the timing chain cover gasket goes bad. Thermostat housing all looks clean, hoses are fine, no leaks around either hose or on the radiator. So I go on the hunt under the truck for any signs of leaks. I check in the radiator cap to find the coolant is pretty low in the radiator. I get home, let the engine cool, and the coolant reservoir is empty again. On this drive, the temperature gauge shot up to H, check engine light came on, I fiddled with the temperature control knob again and it fell back to normal. I check the coolant reservoir to find it empty. Not once during these events did I smell any coolant in the cabin. Similar issue, cold air blowing, temp gauge running hot, messed with the control knob, temp fell back to normal. Realizing there was a problem, I began fiddling with the temperature knob, turning it back to cold then back to hot and suddenly the temp gauge dropped back to normal range, engine ran fine the remainder of the trip. I looked up at the temperature gauge on the console and saw the engine was running hot (about halfway above the middle and H). I reached down and felt stone cold air blowing in through the floor vent despite having the temp dial on full blast heat. A few more minutes went by and I noticed my feet were freezing. Several weeks ago, when driving into work, I turned the defroster on, after a few minutes switched back over to heat. And being this is the best place for troubleshooting minds, if I may ask of your help once again I would be most appreciative! Hello all! Paying another visit here doing some research on a problem that has been bothering me for a few weeks now.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |