Strange smell

rsjohnsn

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And no it's not me :sly I noticed a strange smell last weekend while pulling my camper (8-9k lb) up a small grade. My exhaust temp was at 1100 and the boost was at 25psi and the tranny temp was around 170. I do have the Banks 6 gun and it was on #5 setting. I didn't notice any coolant missing or low oil or tranny fluid. I have smelled this before in a hard run but not sure what or where it is coming from. Anybody have any ideas?

Thanks
Scott
 

Kleetus

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I think it's a combination of the rubber and the oil being heated under the hood. our 86 6.9 absolutely stunk when under load and the fan clutch kicked in. I haven't had it happen with this one yet. I can kinda smell it around the boost cooler hoses, my front one on the intercooler has a bunch of oil on it from that damn recirculating breather, surprised it hasn't shot off yet. It smells, but only faintly.
 

rsjohnsn

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Ok, here's an update on the strange smell. I got the smell everytime the exhaust temp got high and the boost pressure was high. I noticed this more on my last trip hauling around 14K pounds. Well I found what was causing the smell after I saw the smoke coming from under the hood! Talk about something that will get your heart pumping! Anyway, the problem was the insulation that is attached to the top of the firewall above the turbo. The insulation had fallen on top of the turbo at some point and was melting. This last trip had me climbing a pretty steep grade at 1100' and around 20-25 lbs boost and by the time I got to the top I had smoke. So if anyone else is experiencing this smell then I suggest checking your insulation. I don't believe it will catch fire but it will smoke if you get it hot enough!

Thanks
Scott
 

Kleetus

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Wow... important safety tip!

:drive

I wonder what was making our 86 smell then? Probably better off not knowing...
 

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