I’m fairly new to the wrangler scene, but have run into a problem with my wrangler.
2004 TJ Wrangler Manual, Petrol. 100k kms
I bought it about 3 weeks ago, and the engine sounded great - not an issue. I changed the engine oil about 2 weeks ago, and since then it has a loud knock. (5.7L) - 5W40.
The knock is loudest on a cold start, and eventually after 30 min of driving, quietens down to a ticking sound. Sometimes (rarely) it disappears all together.
I changed the oil again to 10W40, but still no fix.
The car has no loss of power, and seems to drive fine.
I’ve managed to record the sound and how it looks, any ideas or diagnoses?
I take it that you have a Chevy small block conversion. In the US,for many years, the oil recommended for that engine has been 5W-30. In fact, the owner’s manual for he '89 Suburban I owned with that engine specifically warned against using 10W-40.