Few Problems with New Motor

984.6gt

Founding Member
Jul 10, 2002
2,806
0
46
Sugar Land
Hey Guys,

I am having a few problems after putting a 2001 Motor in my 98. 1st problem I am having is overheating, I have the ECU Intake Sensor on the Intake and the Temp Guage Sensor in the Drain Plug of the Block. The gauge is reading on the L in NORMAL and on hot days will occasionally get just out of the normal zone. I have heard from a few people that this could be because of the location of the Sensor(Drivers Side right under Exhaust Manifold), but I have also heard of people running this set-up with no problem at all. Now I took it to the shop that installed the motor and they said the fan will only come on when the AC is on, I can only think of 2 reasons this could happen, 1 being that the gauge is reading wrong and the car has not yet reached the temp where the fan comes on, or 2 there is a eletrical problem or the ECU sensor has gone bad, but I dont think that is the problem because I don't get a SES light which should come on if that sensor is bad or unpluged. Let me know what you guys think.

My 2nd problem is with the transmission, I used the T-45 off my old motor along with my FMS Aluminum Flywheel and King Cobra Clutch. Now I have put about 150 miles on the car since the swap and noticed no problems with the tranny at all, untill the other day when I got in the car, got to the end of my street, and I could not get the car into gear. It is like the gate will not open, I can turn the car off, put it in gear, and start it and it will drive in whatever gear you put it in, it will just not let me switch or put it in gear while the car is running. I tried adjusting the clutch with no luck, so I took it back to the shop and the guy said I had no oil in the Transmission, my question is, do you think I caused any damage, or do you think I should be able to add oil and it will be fine? It really pisses me off considering the guy that installed the motor had to take off the tranny and put it on the new motor did not even take the time to look at the fluids, but what can I do. Well those are the problems I am having let me know if you guys have any ideas, Thanks. - Ben
 
You possible burnt up the syncros (I think that is how it is spelled) Driving around without any oil over time will mess up the insides. It will not happen right away after the oil has been drained. This happened in my Chevy transmission. Off subject but are you from Sugar Land, Louisiana?
 
kboy262 said:
You possible burnt up the syncros (I think that is how it is spelled) Driving around without any oil over time will mess up the insides. It will not happen right away after the oil has been drained. This happened in my Chevy transmission. Off subject but are you from Sugar Land, Louisiana?
Texas...

I ran the fluid out of my old pick-up, added fluid after it stuck in gear, and ran another 50k miles before I blew the engine. Now it is still all possible that there was damage and if there is I'd be having a talk with the person who did the engine swap.

My car runs around the O and L on hot days. I even run the heater with the windows down to draw heat from the engine and I'm afraid to run the AC too long for fear of overheating. With that said I believe we should both do a thorough flush of the radiator. One way to tell if you really have a heat problem is to check your overflow resevoir after you have been running for a while and see if has filled up or boiling. Mine did that the other day so I knew something was amiss.
 
4.6.....
Any chance you could swap the wires going to the two sensors?, even if you need to add wire.
That, might give you a clue what is wrong.
(I think the main sensor is broke or has
goofed-up wiring)
 
The first time I ran the wires to the sensor located on the side of the block I got higher readings because the wires contacted the header. I just rewired it and ran it along side the O2 sensor and it works with zero problems.
 
your T-45, unless they capped off the end of your trannie (not likely) while removing it, they probably draind it (only holds three quarts.) This is what i would do since it's easier...Take off your shifter completely...base and all so you can see into the top of your transmission...now take off the check plug on the side of the transmission...that's the higher of the two plugs on the transmission that you have to use a 3/8" drive or something like that on. Now get 4 quarts of Mercon(or equivelent) and add one quart at a time while a buddy leaves his finger in the hole waiting to feel the fluid...that means its full...

as far as overheating...your fan should come on at a specific temp...but I can't remember what...try flushing and filling your entire coolant system then check your thermostat, temp sensor and the like...