06-23-2020, 01:53 PM
Hi all,
I am new to the club and was wondering if anyone has had this problem?
I have twin 7.4l mpi Crusader engines and one of them i running around 195 to 200 degrees. The coolant overflow bottle was blowing out some coolant so i tried to trouble shoot this without any luck. I changed the thermostat with a oem part, replaced the 7lb coolant cap, and nothing changed. I bought a IR temp gun and found that one exhaust manifold is getting hot (230 deg ) Shot the other one and only reaches 170 deg. The other engine manifolds are running also 170 deg on both sides. The Elbows ( All 4 ) are running at 120 deg., engine blocks about 150 deg, and both oil coolers are at 100 deg. Just that one Manifold is hot. I took both coolant lines off and ran a fresh water flush through and found no debris. tried to backwards flush and still nothing. seemed to have a pretty good flow of water but not so sure. I put it all back together and did a test run. Guess what, still running hot ! I could use some help if anyone has had this type of problem.
Thanks, Kevin
I am new to the club and was wondering if anyone has had this problem?
I have twin 7.4l mpi Crusader engines and one of them i running around 195 to 200 degrees. The coolant overflow bottle was blowing out some coolant so i tried to trouble shoot this without any luck. I changed the thermostat with a oem part, replaced the 7lb coolant cap, and nothing changed. I bought a IR temp gun and found that one exhaust manifold is getting hot (230 deg ) Shot the other one and only reaches 170 deg. The other engine manifolds are running also 170 deg on both sides. The Elbows ( All 4 ) are running at 120 deg., engine blocks about 150 deg, and both oil coolers are at 100 deg. Just that one Manifold is hot. I took both coolant lines off and ran a fresh water flush through and found no debris. tried to backwards flush and still nothing. seemed to have a pretty good flow of water but not so sure. I put it all back together and did a test run. Guess what, still running hot ! I could use some help if anyone has had this type of problem.
Thanks, Kevin
