Loud tick on start

[JohnSosa]

Recently got my jeep back after 3 years of it being sat and only driven on the weekends. My dad drove it a few hours to me. When I started it up the next morning it had a nice and loud tick that would come and go until it was fully warm.

Figured it could've been an oil issue because I doubt it had been changed many times in that 3 year stint. Previous oil was 10w30 penzoil plat. I imagine this engine is super loose, about 190k miles on the clock, so i put in some 5w40 T6. Thought it could help out the motor with its high zinc and detergents, also its about 92 degrees or more where im at. On first startup it was ok, then it'll go to driving down the road and the ticking is so loud. It does this everytime until the motor is hot.

Any suggestions?

 

[BDub]

Sounds like it could be piston slap from your description. That can be fixed with a piston swap and can be done without pulling the motor.

 

[macleanflood]

Exhaust leak? Loose exhaust header?

Make a YouTube video and link it here.

-Mac

 

[JKP]

Any of the above, or a sticky lifter or two.

I'd run a change or two of oil of Restore and Protect or M1 Clean through it.

To test for sticky lifters, crank it up and let it run a min or so making the noise. Turn it off for a few mins. If no noise when you restart, the residual oil pressure has pumped up the lifter(s).

 

[Feralkid]

Sounds like it could be piston slap from your description. That can be fixed with a piston swap and can be done without pulling the motor.

piston slap doesn't go away when it's warm. most likely is an exhaust leak that seals itself up when it gets hot and the steel expands.

 

[BDub]

piston slap doesn't go away when it's warm. most likely is an exhaust leak that seals itself up when it gets hot and the steel expands.

I disagree. Piston slap also tends to minimize as the engine reaches operating temperature due to the thermal expansion of the pistons, much like an exhaust leak does.

 

[Feralkid]

Piston slap also tends to minimize as the engine reaches operating temperature due to the thermal expansion of the pistons

but doesn't go away

 

[BDub]

but doesn't go away

As much as a exhaust leak would.

 

[JeepDrivesBest]

Exhaust leak was my first thought too, especially after sitting for 3 years - those gaskets can dry out and crack.

 

[GoldenGorilla]

piston slap doesn't go away when it's warm. most likely is an exhaust leak that seals itself up when it gets hot and the steel expands.

It can quiet down alot when warm as the aluminum piston expands faster than the cast iron block, forcing the piston to square up to the bore. To the point where it isn't audible over the other engine noises.

But I'd also look at exhaust leak as a very possible issue.

 

[JohnSosa]

View: https://youtube.com/shorts/Eh_nYqLNiIQ?is=LMdekoTEko3KKSWa

Here's the link to a 4 second clip

Note- the tick will come on slowly, then all the sudden stop for about 10 seconds... Then comes right back in. Today I thought I could hear a miss fire while it was doing it. I have a compression tester so I may try that soon. Thank you for the replys

 

[macleanflood]

Here is a clip of my engine with a persistent misfire on cylinder 3...that one was getting 30-50 psi of compression.


View: https://youtu.be/7NfuDnHwgVU?is=bAVbN93FETbzMtTG

A longer clip and not inside the Jeep might help.

Putting a long screwdriver to your ear and placing it against things might help localize the sound.

I use my GoPros all the time finding problems...


View: https://youtu.be/rQsu1PdRz18?is=tozAs-EmG-6bRfcN

-Mac

 

[JohnSosa]

Here is a clip of my engine with a persistent misfire on cylinder 3...that one was getting 30-50 psi of compression.


View: %5BURL%5Dhttps://youtu.be/7NfuDnHwgVU?is=bAVbN93FETbzMtTG[/URL]

A longer clip and not inside the Jeep might help.

Putting a long screwdriver to your ear and placing it against things might help localize the sound.

I use my GoPros all the time finding problems...


View: %5BURL%5Dhttps://youtu.be/rQsu1PdRz18?is=tozAs-EmG-6bRfcN[/URL]

-Mac

I tried this morning but it barely made the noise. Yesterday I had my valve cover off and cylinder 6, either intake or exhaust rocker was a little loose so I tightened it about an 1/8th turn, didnt have my torque wrench with me so I was playing it safe