K5 clunk sound on potholes

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RicktheEngineer

Junior Member
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Jun 3, 2016
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Location
New Jersey
First Name
Riccardo
Truck Year
1985
Truck Model
K5 Blazer
Engine Size
6.2 Diesel
When my truck's suspension moves up and down like normal on uneven road, everything is normal, BUT on small dings in the road, or potholes that would cause the truck to buck a little, there is a sound that can only be described as a horse walking on the street. *Clunk clunk*. The spring bushings are new, including the spring pack itself. Steering arm tie rods were replaced. I will admit the sway bar could use new bushings but they are not too bad at all. Cab mounts are 8.5/10 shape. Could this be a loose steering knuckle? Any tips of diagnosis on something so mysterious? It sounds like it's likely coming from the front. Thanks everyone.
 

twinturbo427

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Location
Florida
First Name
Phil
Truck Year
1987
Truck Model
Suburban
Engine Size
350
Just out of curiosity, how far are your spring eyelets from the frame?
 

Honky Kong jr

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Denver,PA
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J-me
Truck Year
87
Truck Model
V10
Engine Size
Lil BB 407
How about ball joints?
 

Oldrider

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NC
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Jerry
Truck Year
1985
Truck Model
k2500
Engine Size
350
Check the shock mounting bolts. If the metal spring rolls in the shock eyes are larger than the bolts (by too much) the play/slop will cause
a clunk in the front shocks.
 

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