Hey guys, lately, and since i bought my truck, i have noticed a sweet smell coming from the exhaust, i have changed the motor, and still notice it a bit, sometimes more than others. i have never smelt burning prestone so i dont know if its that, and also my truck never overheats, or never goes over half for that matter, i never have to add prestone, and it never smokes. so what could it be, its a smell thats hard to describe, but noticeable. any one else experienced this? i do have leaky cam and crank seals i believe.


92 pickup
4x4
3.0l

thanks for any input.

 

antifreeze smells sweet. if its a 3.0 headgasket

 

ya but did u read where i said it never over heats and never have to add prestone.

 

More than likely antifreeze. Time to do a compression/leakdown test.

Edit: It doesn't have to run hot to be a headgasket. Not yet, anyway. If you have a tiny leak from the water jacket to the combustion chamber, it will burn only a few drops (enough to smell sweet) without looking low or causing overheating. A tiny leak leads to a big leak which leads to a ruined engine if you don't catch it quick, so I would check it out as soon as possible.

Get a borescope and look down in the combustion chambers. If they're shiny (ie - no carbon on the piston tops or valves), you have a coolant leak into the chamber.

 

yes but you gotta undearstand not much eles would smell sweet in your exhaust... and we dont have smelloweb yet

 

Antifreeze is the only liquid in a vehicle that smells sweet, you need to do a leakdown and compression test.

 

how much is a new head gasket, and how many hours to change it?

 

Its a big job. If you can afford to, and you are reasonably mechanically inclined, try swapping in a 3.4L V6.

 

https://www.yotatech.com/forums/f116...-parts-146181/

I recently had a good experince with the local toy dealership

 

yeah but it might no be the head gasket sometimes a little gets through.
you have a tiny leak from the water jacket to the combustion chamber, it will burn only a few drops (enough to smell sweet) without looking low or causing overheating. A tiny leak leads to a big leak which leads to a ruined engine if you don't catch it quick, so I would check it out as soon as possible.
as the previous postered said..

IT MIGHT BE NOTHING!!

 

has anyone ever heard of or used that "heal a seal" stuff that is supposed to fix any internal leaks? maybe some of that would stop mine, since its such a small leak?

heres the site.

http://www.heal-a-seal.com/

 

scratch my last post, i looked into that heal a seal stuff, and no one said it works, ripp off company.

 

yeah.. dont worry too much but i would check the compression.. did you say this was a rebuild engine??

i have a 4runner i got from a guy at work 22re and i still dont trust the rebuild he had and i always have thoughts about putting insurance back on the trail rig!! even though its gutted and ugly...and my dd is a bueat

 

no this isnt a rebuild engine, this is an original engine, its got about 180000k on it. i believe the head gasket recall was done... but i wonder, if it wasnt done on this engine, would i be able to have it done even though its in a different truck?

 

it wasnt rebuilt when it was installed??
id look into a 3.4 but i tottal wouldnt have the cash either

 

i installed it a few months ago