Waterboy Posted April 11, 2004 Report Share Posted April 11, 2004 95 w/3.1 "M" engine & 161,000 miles. Been doing just fine. All of a sudden "low coolant" lit. Sure enough the overflow tank is empty. Check oil fill cap. Yep, that is where the coolant went. Pulled the intake upper and lower. Noticed the gasket at the coolant port (next to #6) was split on the side between the port and the push rod. Is this the problem? At first I would say "yes". Except, that I had a little trouble removing the lower intake because it was hung on the pipe that goes from the t'stat housing rearward. I may have accidently damaged the gasket during the removal process. So, I'm here for some opinions. Also, how do I know if I have "standard non-adjustable rocker arms" or "service adjustable rocker arms"? Thank you in advance for ya'lls inputs. Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted April 11, 2004 Report Share Posted April 11, 2004 Well, your engine has fallen victim to the 1995-2001 3100/3400/3800 intake gasket problem. Not totally sure about your rocker arms. I need to brush up on 94+ W-bodys :oops: Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted April 11, 2004 Report Share Posted April 11, 2004 If you have coolant in the oil and no steam anywhere, you blew the intake gasket. As for the rocker arms, the only adjustable rockers were on Gen I iron head 660's. Gen II and some Gen III has non-adjustable then the rest of Gen III is roller rocker. But, how you tell is by looking at the rocker stud. If you look at your rocker stud, the top part where the threads are is a smaller diameter than the smooth part below it. The rocker tightens against the lip where the two different diameters meet, making it easy to set the pre-load and valve-lash with a simple torque spec on the rocker nut Quote Link to comment Share on other sites More sharing options...
dbtk2 Posted April 11, 2004 Report Share Posted April 11, 2004 If you have coolant in the oil and no steam anywhere, you blew the intake gasket. Out of curiosity, this steam that you are speaking of...where would it be coming from and I am assuming the cause is a head gasket??? Shawn Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted April 11, 2004 Report Share Posted April 11, 2004 If you have coolant in the oil and no steam anywhere, you blew the intake gasket. Out of curiosity, this steam that you are speaking of...where would it be coming from and I am assuming the cause is a head gasket??? Shawn Yeah.......white steam, coming from below a head, and the cause would be the head gasket. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted April 11, 2004 Report Share Posted April 11, 2004 If you have coolant in the oil and no steam anywhere, you blew the intake gasket. Out of curiosity, this steam that you are speaking of...where would it be coming from and I am assuming the cause is a head gasket??? Shawn If the intake gasket blows/leaks in a manner in which the coolant doesn't go anywhere it's not supposed to internally, it *can* leak outwardly by the oil pump drive o-ring(my 93 GP w/ the 3.1 did this), I had a slight leak there and could see steam from that area when the gasket started leaking. Quote Link to comment Share on other sites More sharing options...
Goph Posted April 11, 2004 Report Share Posted April 11, 2004 this bring back memories for me I had the same problem just my head gaskets blew also. 6k miles after it was fixed I spun a rod bearing because of the water that was in the oil at the time. Quote Link to comment Share on other sites More sharing options...
Waterboy Posted April 11, 2004 Author Report Share Posted April 11, 2004 If you have coolant in the oil and no steam anywhere, you blew the intake gasket. As for the rocker arms, the only adjustable rockers were on Gen I iron head 660's. Gen II and some Gen III has non-adjustable then the rest of Gen III is roller rocker. But, how you tell is by looking at the rocker stud. If you look at your rocker stud, the top part where the threads are is a smaller diameter than the smooth part below it. The rocker tightens against the lip where the two different diameters meet, making it easy to set the pre-load and valve-lash with a simple torque spec on the rocker nut Thanks... I did not notice any steam, but it was at night and I did not drive very far. I have the stud with the shoulder as you said. Again, thanks... Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted April 12, 2004 Report Share Posted April 12, 2004 If you have coolant in the oil and no steam anywhere, you blew the intake gasket. As for the rocker arms, the only adjustable rockers were on Gen I iron head 660's. Gen II and some Gen III has non-adjustable then the rest of Gen III is roller rocker. But, how you tell is by looking at the rocker stud. If you look at your rocker stud, the top part where the threads are is a smaller diameter than the smooth part below it. The rocker tightens against the lip where the two different diameters meet, making it easy to set the pre-load and valve-lash with a simple torque spec on the rocker nut Thanks... I did not notice any steam, but it was at night and I did not drive very far. I have the stud with the shoulder as you said. Again, thanks... No problem 8) Quote Link to comment Share on other sites More sharing options...
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