Coolant in Exhaust
#1
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Car: 1984 Trans Am 15th anniversary
Engine: L69
Transmission: 700r
Axle/Gears: 3:73
Coolant in Exhaust
After pulling my car out for the first time this season I have decided to dig further into the cloud of white smoke that shoots out the tail pipe when idling hot. Last season I thought it was the carb dumping fuel because I noticed no coolant loss, now I am seeing coolant going down fast and the motor heating up like it wouldn't before.
I have the fan rigged up to come on with ign. The car would never go past a 1/4 on the temp gauge and now for some reason gets to 1/2 point driving around town and then overheating on the highway. Previous owner of the car overheated it because he took the air dam off. He blew both intake gaskets and had them changed at a shop before I bought it.
Compression is all consistent at 150-155 with the exception of 1 cyl at 120. There is no coolant in the oil and the motor still lays rubber and pulls hard. Oil still looks gold more then halfway through a change. But I am certain the motor is leaking coolant into the exhaust.
I am thinking headgasket but want to get some input.
I have the fan rigged up to come on with ign. The car would never go past a 1/4 on the temp gauge and now for some reason gets to 1/2 point driving around town and then overheating on the highway. Previous owner of the car overheated it because he took the air dam off. He blew both intake gaskets and had them changed at a shop before I bought it.
Compression is all consistent at 150-155 with the exception of 1 cyl at 120. There is no coolant in the oil and the motor still lays rubber and pulls hard. Oil still looks gold more then halfway through a change. But I am certain the motor is leaking coolant into the exhaust.
I am thinking headgasket but want to get some input.
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Car: 1991 Z28 1LE
Engine: 370CID GenIII
Transmission: 4l60e
Axle/Gears: 4.33 Moser 9inch
Re: Coolant in Exhaust
Head gasket, or possible cracked head. Pull the heads, send them to the machine shop to be checked and pop some new head gaskets on. Have fun sorry bout your luck... Can verify by doing a block test to verify compression gasses in the coolant.
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Car: 1984 Trans Am 15th anniversary
Engine: L69
Transmission: 700r
Axle/Gears: 3:73
Re: Coolant in Exhaust
No haven't done that
If its that bad I wont even bother with this old motor. It is the original L69 with around 220,000km. I do have two free engine accessible, one LB9 and one L05.
The plug was pretty clean like liquid clean almost. There is also heavy blow by coming from the crankcase breather on that side. I figured with the 120 could be worn rings. But the motor runs so well and doesn't really burn oil. I have seen engines with worse compression and nothing out the tailpipe that indicated anything.
The plug was pretty clean like liquid clean almost. There is also heavy blow by coming from the crankcase breather on that side. I figured with the 120 could be worn rings. But the motor runs so well and doesn't really burn oil. I have seen engines with worse compression and nothing out the tailpipe that indicated anything.
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Car: 1991 Camaro RS yellow
Engine: was '91 V6, now '89 5.7/355 TPI
Transmission: 4 speed automatic
Axle/Gears: Moser 3.73 with zexel posi
Re: Coolant in Exhaust
My 355 engine has bolt holes on driver's side that were drilled through to the water jacket by the manufacturer, causing coolant to leak. I welded a stud on the rear one, but couldn't on the front one, because of clearance problems; threading tape eliminated the leak.
#7
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Car: 1984 Trans Am 15th anniversary
Engine: L69
Transmission: 700r
Axle/Gears: 3:73
Re: Coolant in Exhaust
My 355 engine has bolt holes on driver's side that were drilled through to the water jacket by the manufacturer, causing coolant to leak. I welded a stud on the rear one, but couldn't on the front one, because of clearance problems; threading tape eliminated the leak.
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