how to correctly purge a coolant system
06-09-2007, 02:15 PM
#11
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RE: how to correctly purge a coolant system
ORIGINAL: capri debris
Stop and think through your question... how can an air bubble in your coolant make smoke of any color come out your tailpipe? I'm interested in knowing your though pattern on this. I see no difference in asking a question like this... "My tires are low on air, would that cause smoke to come out my tailpipe?" Your coolant passages are a completely seperate system than your exhaust system. If you have a blown head gasket and coolant is leaking into the cylinders or condensation in the exhaust.... you will get white smoke. If you have bad rings or valve stem seals.... you will get blue smoke (burning oil). If you are running too rich... you will get black smoke. An air bubble in the cooling system will just make your car run hot which could eventually lead to a blown head gasket and then simply burping it won't fix the problem at that point. Does your motor have over 100,000 miles? If so you may just be seeing normal smoke from a tired motor, but an air bubble inthe cooling system has nothing to do with it.
Stop and think through your question... how can an air bubble in your coolant make smoke of any color come out your tailpipe? I'm interested in knowing your though pattern on this. I see no difference in asking a question like this... "My tires are low on air, would that cause smoke to come out my tailpipe?" Your coolant passages are a completely seperate system than your exhaust system. If you have a blown head gasket and coolant is leaking into the cylinders or condensation in the exhaust.... you will get white smoke. If you have bad rings or valve stem seals.... you will get blue smoke (burning oil). If you are running too rich... you will get black smoke. An air bubble in the cooling system will just make your car run hot which could eventually lead to a blown head gasket and then simply burping it won't fix the problem at that point. Does your motor have over 100,000 miles? If so you may just be seeing normal smoke from a tired motor, but an air bubble inthe cooling system has nothing to do with it.
ORIGINAL: AdderMk2
I'd say you need to do a compression and leakdown test
I'd say you need to do a compression and leakdown test
ORIGINAL: AdderMk2
almost... very close
Blue smoke on startup, then clears... bad valve seals
blue smoke when "on it".... piston ring blow by
blue smoke with engine braking.... Bad valve guides
ORIGINAL: dman302
Smoke out the exhaust is not a air/coolant issue...it's a leak into the cylinders either by the intake or head gasket, the high running temps would support a head gasket idea. Blue smoke when 'on it' would indicate blowby where as blue smoke when engine braking (slowing the car by taking the foot off the throttle and allowing the car being in gear to slow it) is a better indication of valve seals. Adder is correct in the compression and leak down test....
Smoke out the exhaust is not a air/coolant issue...it's a leak into the cylinders either by the intake or head gasket, the high running temps would support a head gasket idea. Blue smoke when 'on it' would indicate blowby where as blue smoke when engine braking (slowing the car by taking the foot off the throttle and allowing the car being in gear to slow it) is a better indication of valve seals. Adder is correct in the compression and leak down test....
Blue smoke on startup, then clears... bad valve seals
blue smoke when "on it".... piston ring blow by
blue smoke with engine braking.... Bad valve guides
06-09-2007, 02:27 PM
#12
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RE: how to correctly purge a coolant system
ORIGINAL: capri debris
"My tires are low on air, would that cause smoke to come out my tailpipe?"
"My tires are low on air, would that cause smoke to come out my tailpipe?"
My car smokes out the tailpipes like crazy when the tires are low on air, but when I put inflate them to proper psi, the problem completely goes away. Wierd huh??
06-09-2007, 02:39 PM
#13
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RE: how to correctly purge a coolant system
I hate to say this, but I think something went wrong when you did your HCI. The engine physically shouldn't smoke at all, underhood temps shouldn't be much different than before, and smoke out the tailpipes aint good. I know there has been mention that the head gaskets smoke until theyre broken in.. this is B.S. If everything is good when firing up a motor that has just had an HCI, or even a newly machined performance motor, it should fire right up smoothly. (unless it just takes a few seconds to burn the prelube in the cylinders) All motors I've put in fired up perfectly right from the get go.
The only smoke that may come from the engine itselft should just be greasy hand prints from the headers and exhaust but shouldn't last for more than a few minutes.
Also there may be some funny smells for a day or two as the engine paint, gaskets, abd hoses get hot for the first time.
Do a leakdown test leak down test like others have mentioned to try and isolate the problem, but I think there is a head gasket sealing issue and a timing issue.
The only smoke that may come from the engine itselft should just be greasy hand prints from the headers and exhaust but shouldn't last for more than a few minutes.
Also there may be some funny smells for a day or two as the engine paint, gaskets, abd hoses get hot for the first time.
Do a leakdown test leak down test like others have mentioned to try and isolate the problem, but I think there is a head gasket sealing issue and a timing issue.
06-09-2007, 03:13 PM
#14
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RE: how to correctly purge a coolant system
ORIGINAL: cleanfitty
I hate to say this, but I think something went wrong when you did your HCI. The engine physically shouldn't smoke at all, underhood temps shouldn't be much different than before, and smoke out the tailpipes aint good. I know there has been mention that the head gaskets smoke until theyre broken in.. this is B.S. If everything is good when firing up a motor that has just had an HCI, or even a newly machined performance motor, it should fire right up smoothly. (unless it just takes a few seconds to burn the prelube in the cylinders) All motors I've put in fired up perfectly right from the get go.
The only smoke that may come from the engine itselft should just be greasy hand prints from the headers and exhaust but shouldn't last for more than a few minutes.
Also there may be some funny smells for a day or two as the engine paint, gaskets, abd hoses get hot for the first time.
Do a leakdown test leak down test like others have mentioned to try and isolate the problem, but I think there is a head gasket sealing issue and a timing issue.
I hate to say this, but I think something went wrong when you did your HCI. The engine physically shouldn't smoke at all, underhood temps shouldn't be much different than before, and smoke out the tailpipes aint good. I know there has been mention that the head gaskets smoke until theyre broken in.. this is B.S. If everything is good when firing up a motor that has just had an HCI, or even a newly machined performance motor, it should fire right up smoothly. (unless it just takes a few seconds to burn the prelube in the cylinders) All motors I've put in fired up perfectly right from the get go.
The only smoke that may come from the engine itselft should just be greasy hand prints from the headers and exhaust but shouldn't last for more than a few minutes.
Also there may be some funny smells for a day or two as the engine paint, gaskets, abd hoses get hot for the first time.
Do a leakdown test leak down test like others have mentioned to try and isolate the problem, but I think there is a head gasket sealing issue and a timing issue.
yea there was a timing issue... ive fix that a few nites ago.... so its running a 14* now... but i got an update on the smoke.... had my dad follow me agian on the bike with out is sunglasses so he could tell the smoke color better.... first off i get smoke when i get on it... more i get on it the more smoke i get.... also the smoke isnt just white... its whiter but dad smell burning oil and it didnt disappate like white antifreeze smoke would... its lingered a lil.... he said he noticed a bit of blue tint in it some times.... it doesnt smoke when i turned it on... it used to when i first of it done.... so im thinking that was the **** your talkin about burning off... id didnt do it to long... so i think it was ok... i think u may have a head gasket leak tho.... what about these leaking test and compression test??? how do u do them???
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