Recent content by jswiftsr

  1. J

    Will Not Reach Normal Operating Temperature

    I am wondering if the regulator on the spider may be defective? If the diaphragm in the regulator was not leaking gas straight into the intake....but maybe not regulating fuel pressure to the poppets....could this cause a rich condition, not throwing a code but running a rich mixture, thus...
  2. J

    Will Not Reach Normal Operating Temperature

    For those that are confusing the thermostat installation in the 4.3L (L35) "W" Engine with the '96 and up 4.3L, here is a diagram I found in my Service Manual. It does show the beveled rubber thermostat gasket and the paper gasket between the thermostat housing and the intake surface. This is...
  3. J

    Will Not Reach Normal Operating Temperature

    It's not missing normal temp but by 40 degrees. Removing the fan would definitely overheat it. I do intend on blocking the Air Flow to see what that does. But, I need to find out what is causing the 40 degree deficiency. I'm thinking maybe still rich....but I dunno.
  4. J

    Will Not Reach Normal Operating Temperature

    "I noted you have a TBI engine as I was looking up your parts in the Rockauto catalog. I am not familar with the specifics on the V6's or TBI," NO! This is a 4.3L VIN W CPI Engine. The thermostat mounts in the front if the intake. It does not have a recessed groove that the O-Ring fits in like...
  5. J

    Will Not Reach Normal Operating Temperature

    "If the engine runs, it should build temperature at least in summer." It does. 155 Degrees in winter and summer. "Replace the fuel pump. The check valve has failed." I replaced the fuel pump already. Not Sender/Pump Asm, but installed a Fuel Pump in the sender Asm. Pump is working (60psi with...
  6. J

    Will Not Reach Normal Operating Temperature

    Don't have another old thermostat as I know of. Been driving it at work. Using Dexcool that I mix myself (50/50) with distilled water. I was thinking of maybe pulling the thermostat again.....installing another new thermostat, and just using the rubber seal in the intake. What sealant do you use...
  7. J

    Will Not Reach Normal Operating Temperature

    I did try 3 thermostats....2 Stants and the last one came from GM. The thermostat is installed with spring toward the manifold. Both rubber and paper gaskets used. I once thought the paper being in there that the thermostat might have came loose and allowed water around the edge of the rubber...
  8. J

    Will Not Reach Normal Operating Temperature

    WOT= Wide Open Throttle. Compression readings were 128-135. The soot was from a defective O2 sensor I replaced. though I think it could still be running a lil rich. I did replace all 6 plugs with Iridium, new cap and rotor with a new wire set.
  9. J

    Will Not Reach Normal Operating Temperature

    Yes, engine cold (about 54 degrees that day). WOT 4 turns per cylinder. This engine has about 30K on it since build. I took the guy a "W" Tonwanda engine and he dumped a I'm guessing a rebuilt block with all the numbers off of it...and the counter balancer had a sleeve bearing in the rear...
  10. J

    Will Not Reach Normal Operating Temperature

    Verified temp explanation in above reply. Installed new temp sender and coolant temp sensor for computer. When I first installed the rebuilt engine I installed a new radiator (correct application) and a new fan clutch. For a few years after the fan sounded like it was revving most of the time...
  11. J

    Will Not Reach Normal Operating Temperature

    I put a temp Probe with my fluke digital meter in the radiator. I also tested it at the tstat neck and the heater hoses with an IR Thermometer. they all matched the temp gauge, 155 degrees. I have little heat blowing through the vents, with heat on. But a blend door is key to heat in the...
  12. J

    Will Not Reach Normal Operating Temperature

    For the heater hose routing, one is coming off the water pump and the other off of the intake. Both go to the heat control valve. When heat is on, the water circulates through the heater core. When the heat is off, it bypasses the heater core and routes the water right back to the engine. So if...
  13. J

    The Stupid Engine Questions Thread

    I have had a torque Converter bolt back out before....and it was hitting the block when it went around. Soundd just like a rod hammering in the crank. Tightened and torqued bolts.....solved the knock. I also had a bad engine dampener (harmonic balancer). Rubber came loose.....knocked just like a...
  14. J

    Will Not Reach Normal Operating Temperature

    1995 Chev Astro VIN:W CPI I have a 1995 Chevrolet Astro Van. I had the engine rebuilt about 9 years ago. I don't remember if it did it from the start or not, but the engine temp will not get over 155 degrees. I put 3 different thermostats in it. The last one came from GM. They were all 195...
See more

Latest posts

Members online

Total: 853 (members: 17, guests: 836)

Forum statistics

Threads
64,742
Messages
1,399,742
Members
52,346
Latest member
MarekRano

Share this page

Top