well been busy and away from the site lately but now its back to finishing the truck.
i found my leak, i think. right behind the vacumme pump between the head and block you can feel a rush of luke warm air. i was thinking head gasket but have a few questions before buying a compression tester.
first shouldnt this be hot if a headgasket? there is no water or oil leaking, but there is a good bit of soot in that area, i cleaned the area 200 miles ago and now the soot is back, but its under the alternator bracket area. it is about 1/4 inch away from the exhaust manifold. also the headgasket area is full of soot. so i assume this is a broken fire ring, but it should be combustion hot shouldnt it?
next some more info, i have had a chuffing sound, with a slight knock coming from around the vac pump area, i have removed the vac pump and it is still there so that is not the issue. it is rpm related, but it goes up slower than the rpms. at about 2500 rpm its almost gone and hard to hear, but when at idle it is louder than the exhaust.
tomorrow i plan to tear off the alt and vac pump with brackets and see waht i can find. and i will report after that is done.
also i have done other tests,
its not an injector, the engine stumbles on each cylinder when cracked, however the noise got a lot quieter when i cracked the injector on the pass front ( one where the suspected leak is)
no coolant and oil mixing. so if a headgasket its only the firering thats bad.
this started before the turbo went on and was a lot quieter. it has since gotten louder. there were no obvious reasons for it to start, but i was test fitting the turbo and assumed an exhaust leak before going any further.
any input is appreciated since i have not seen such a large casket surface leak like this before.
i found my leak, i think. right behind the vacumme pump between the head and block you can feel a rush of luke warm air. i was thinking head gasket but have a few questions before buying a compression tester.
first shouldnt this be hot if a headgasket? there is no water or oil leaking, but there is a good bit of soot in that area, i cleaned the area 200 miles ago and now the soot is back, but its under the alternator bracket area. it is about 1/4 inch away from the exhaust manifold. also the headgasket area is full of soot. so i assume this is a broken fire ring, but it should be combustion hot shouldnt it?
next some more info, i have had a chuffing sound, with a slight knock coming from around the vac pump area, i have removed the vac pump and it is still there so that is not the issue. it is rpm related, but it goes up slower than the rpms. at about 2500 rpm its almost gone and hard to hear, but when at idle it is louder than the exhaust.
tomorrow i plan to tear off the alt and vac pump with brackets and see waht i can find. and i will report after that is done.
also i have done other tests,
its not an injector, the engine stumbles on each cylinder when cracked, however the noise got a lot quieter when i cracked the injector on the pass front ( one where the suspected leak is)
no coolant and oil mixing. so if a headgasket its only the firering thats bad.
this started before the turbo went on and was a lot quieter. it has since gotten louder. there were no obvious reasons for it to start, but i was test fitting the turbo and assumed an exhaust leak before going any further.
any input is appreciated since i have not seen such a large casket surface leak like this before.