boost = coolant smell?

[TheNeek]

Bearing in the turbo going out (factory unit)?

Heater Core?

I know troubleshooting is involved, but who's got ideas of where to start.

Summer is coming here in Arizona so I'll be doing the vac lines and a coolant service, and the throttle body bearings. Would be a really great time to figure out this smell and cap it off.

 

[Maverick87]

Re: boost = coolant smell?

Inside the truck or outside ? If its outside might need to replace the cap on the i/c.

 

[TheNeek]

Re: boost = coolant smell?

Inside the truck or outside ? If its outside might need to replace the cap on the i/c.

inside. Windows open or closed. I was going to do the cap with the coolant service. Good idea though.

 

[blk00z28]

Re: boost = coolant smell?

Sounds like Heater core to me.. lol.. isnt it funny that mine went yesterday too huh.. :lol:

If it was outside I'd say your water pump was leaking and or going out.

 

[TheNeek]

Re: boost = coolant smell?

Sounds like Heater core to me.. lol.. isnt it funny that mine went yesterday too huh.. :lol:

If it was outside I'd say your water pump was leaking and or going out.

I know the core has a trickle of flow through it all the time... but does it get enough pressure to burst even when the flow is off? Ie, no heater control on. And I'm assuming that the smell might not be associated with the turbo building manifold pressure. Just the water pump pushing harder due to RPM.

 

[JustBeachin]

Re: boost = coolant smell?

heater core

 

[SY2932]

Re: boost = coolant smell?

Yup, heater core. It's on the top of the "problems list" for these trucks. There's a reason why it is the most viewed "how to" on the [url="http://sytyarchives.com/"]sytyarchives.com[/url]...

 

[TheNeek]

Re: boost = coolant smell?

Yup, heater core. It's on the top of the "problems list" for these trucks. There's a reason why it is the most viewed "how to" on the sytyarchives...

add one to the view list on that one. Tackle that this weekend. Seems to go inline with my coolant service anyway. Oh and removing the "aftermarket" stereo and tossing it off the nearest 20 story building. Hopefully I'll remember to remove the latest Prodigy CD from it first.

 

[George Blake]

Re: boost = coolant smell?

Heater core always has full flow and pressure on it. When you operate the control, it moves a vacuum operated door that allows air to flow into the plenum through the core. So...yep, heater core busted.

 

[TheNeek]

Re: boost = coolant smell?

Heater core always has full flow and pressure on it. When you operate the control, it moves a vacuum operated door that allows air to flow into the plenum through the core. So...yep, heater core busted.

Crap.

 

[George Blake]

Re: boost = coolant smell?

If you can't get time to fix it right now, you can always put a nipple between the two lines and just bypass the heater core. You don't need it in the summer anyway.

 

[Don W.]

Re: boost = coolant smell?

But the original Q was coolant smell with boost. If the heater core is leaking (and yes I've changed mine also!) heater core would leak all the time. There is coolant flowing through the turbo but, correct me if I'm wrong, I thing it's just a passage. No seals or anything involved. So that leave the IC but I think it would loose water under boost.:squint:

Having said all that, since the smell is inside, like George said, cap the thing off and see what happens.

 

[gjp]

Re: boost = coolant smell?

I noticed my sy has a slight smell. Same thing...only when I jump on it, then a few seconds later I smell it??? I know the hose in front of the block that feeds the turbo has a smal leak but that cant be it.

 

[SY756]

Re: boost = coolant smell?

It's the heater core. Probably the only reason that it smells after you get on it is that your raising the pressure in the system and it leaks/sprays out more coolant. It could be just a pin hole leak and when you "get into it" the pressure goes up and leaks into the cab. Have you checked the carpet under the glovebox for it? Anyway about it, if you smell it in the cab, the heater core is the only thing that can do that. It's really not that big of a deal changing it out. You should try a 95 Blazer if you want to inhance your language.:banghead: And, if you go to AUTOZONE to get a new one, make sure they give you the RIGHT ONE. Been there Done that. :rant: BTW, I changed mine out in about 45 minutes.

 

[Ian Turgeon]

Re: boost = coolant smell?

Yea, our trucks have coolant flowing all the time through the heater core, some cars have valves in line that prevent the flow, but we have no valve to do so.

 

[sleepy]

Re: boost = coolant smell?

I've been through two or three heater cores on my truck, and I don't hammer on it tooo much.

When you get one - make sure you get one from a quality parts store too. I've gotten bad ones. Sucks when you have to do it twice...

 

[gjp]

Re: boost = coolant smell?

I changed the HC after 40k in my 91 sonoma. Should be the same I guess. I will try with the windows closed to see.

 

[gjp]

Re: boost = coolant smell?

did you ever find the leak. Mine is a bad heater core. I can now see the antifreve comming out of the heater vent. picked up a new HC from napa.