Smoke troubles

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Elmomo

New member
Joined
Apr 23, 2025
Messages
2
Reaction score
0
Location
Flagstaff a,z
Hello everyone I bought my 79 bronco two months ago and since then have added a few new parts and everything works fine, except for after running it for a little bit, the oil pressure begins to drop and after a certain point bluish smoke starts to come out the exhaust when idling not so much when driving but oil pressure continues to be low I can’t seem to figure it out Would really appreciate some help on this. it has a 351M and everything else seems to run in normal order plus old owner claims it has 83,000 miles original so I’m just hoping it’s nothing too bad! Thanks again for the approval and looking forward to being part of the communityIMG_9770.jpegIMG_9824.png
 

L\Bronco

Well-known member
Joined
Feb 28, 2022
Messages
886
Reaction score
916
Location
A.B. Canada
Hey Elmomo!
Welcome to the zone!
That is a nice looking Bronco!
Best year ever!
That mileage is insanely low!
Good find!(If its real)
a couple questions first:
Did it sit in storage for a long time?
What oil is currently in it?
When the oil pressure is low, are there any ticking or knocking noises from the engine at idle?

Cheers
 
OP
OP
E

Elmomo

New member
Joined
Apr 23, 2025
Messages
2
Reaction score
0
Location
Flagstaff a,z
Hey Elmomo!
Welcome to the zone!
That is a nice looking Bronco!
Best year ever!
That mileage is insanely low!
Good find!(If its real)
a couple questions first:
Did it sit in storage for a long time?
What oil is currently in it?
When the oil pressure is low, are there any ticking or knocking noises from the engine at idle?

Cheers
Hey and no I’ll post a picture of the condition I found it in and 10w 40? Is what was recommended at the store and was wondering myself if I should switch it out again to something thicker? Also it was not smoking before only till after tuneup was done And no there is absolutely no knocking or ticking noise engine sounds nice and strong oh and before the 10w40 they gave me 10w30 so now it has 10w 40 and an additive they recommend I rebuilt the carburetor did spark plugs, water pump, power steering pump, spark, plug cables, oil filter carburetor was rebuilt after it was already smoking
 

Attachments

  • IMG_9340.jpeg
    IMG_9340.jpeg
    792.9 KB · Views: 2
  • IMG_9335.jpeg
    IMG_9335.jpeg
    819.6 KB · Views: 2
  • IMG_9339.jpeg
    IMG_9339.jpeg
    741.9 KB · Views: 2
  • IMG_9338.jpeg
    IMG_9338.jpeg
    467 KB · Views: 2

L\Bronco

Well-known member
Joined
Feb 28, 2022
Messages
886
Reaction score
916
Location
A.B. Canada
Very cool find!
10w40 should be fine. (They originally had 10w30)
It might have stuck oil control rings from sitting.
You could try adding a bit of either Marvel mystery oil or sea foam to the crankcase (with the oil) plus some in the gas (for a couple tank fulls) It occasionally frees up stuck rings.

Theres no chance it has stale gas in the tank is there?

Could be a lot of things.
One step at a time
Cheers
 

Members online

Latest posts

Forum statistics

Threads
22,706
Messages
137,149
Members
25,433
Latest member
Elmomo
Top