Chevy Engines

Deichler · May 22, 2007

I have a 2002 Silverado with the 4.8 V-8. I was wondering if any of you out there have had the intakes go out on your rigs?? I currently have 67,000 and am wondering what to look for. I work with a gentleman that says he is losing coolant out the exhaust. No coolant in the oil, or no leaks. He says he is going to change intake gaskets. I am going along the lines of head gasket myself. What y'all think?

Deichler · May 22, 2007

I have a 2002 Silverado with the 4.8 V-8. I was wondering if any of you out there have had the intakes go out on your rigs?? I currently have 67,000 and am wondering what to look for. I work with a gentleman that says he is losing coolant out the exhaust. No coolant in the oil, or no leaks. He says he is going to change intake gaskets. I am going along the lines of head gasket myself. What y'all think?

He has a 2002 Silverado with the 5.3. Also, has 65,000 miles.

clm7214 · May 22, 2007

I have a 2002 Silverado with the 4.8 V-8. I was wondering if any of you out there have had the intakes go out on your rigs?? I currently have 67,000 and am wondering what to look for. I work with a gentleman that says he is losing coolant out the exhaust. No coolant in the oil, or no leaks. He says he is going to change intake gaskets. I am going along the lines of head gasket myself. What y'all think?

The intake gasket doesnt have anything to do with the coolant. If hes smelling it in the exhaust i would put my money on head gaskets. I replaced my intake gaskets at about 104,000 miles and it made a difference. They are know to leak on these engines.

critter · May 22, 2007

'02 - 5.3, 111,000 and no problems

C & A s Dad · May 22, 2007

CLM 7214 is correct. The intake on these engines is dry. If he has coolant in the exhaust it is head gaskets or heads.

I would also say it has been run hot at some point. To my knowledge, the head gaskets on these engines are rock solid and have no issues that I know of.

Tell him to be sure and check the water pump very closely. I have heard of them leaking small amounts and it is almost impossible to spot because the coolant never hits the ground or leaves a puddle.

Deichler · May 23, 2007

CLM 7214 is correct. The intake on these engines is dry. If he has coolant in the exhaust it is head gaskets or heads.

I would also say it has been run hot at some point. To my knowledge, the head gaskets on these engines are rock solid and have no issues that I know of.

Tell him to be sure and check the water pump very closely. I have heard of them leaking small amounts and it is almost impossible to spot because the coolant never hits the ground or leaves a puddle.

That's exactly what I thought. He's still set on the intake, however I believe it is either heads (more than likely) since he tows alot, or water pump. Also, I believe they are copper head gaskets correct?? I looked at mine and seen some coppper sticking out. Thanks for the info. Anybody with any major problems on the 4.8's?? Let me know I am curious. Thanks.