Olds67
Well-Known Member
- Joined
- June 30, 2021
- Messages
- 150
- Reaction score
- 74
- City, State
- Munich
- Year, Model & Trim Level
- 1999 4x4 highclassSOHC V6
If you can’t/ dont want to inspect the chains/guides:2000 Explorer XLT 2WD 4.0L SOHC, JOB 1, VIN E, 5-Speed Automatic O/D 5R55E, Manufactured 09/99.
@donalds - Do you mind if I ask you about the timing chain tensioners? Specifically, 7U3Z-6K254-A (Right) and 7U3Z-6K254-B (Left). I'd like to understand if I... should... or shouldn't... replace mine.
Assume the following:
- I don't have the ability to drop the oil pan nor remove the valve covers. Thus, I cannot perform diagnostics that require the removal of these parts.
- My engine (4.0L SOHC) has 145,000 miles on it. In the past, sometimes it's had good care vis a vis oil changes... sometimes not.
- My engine rattles on startup. However, I cannot discern/describe what type of rattle it is.
Given the assumptions above, I don't know which parts of the "timing chain system" are, or aren't, broken/stuck/stiff/etc. Based on this, should I replace the 2 timing chain tensioners?
Please advise. Many thanks!
More important than the tensioners on a high mileage sohc if you can’t/ don’t wanna put in money or work (@donalds @CDW6212R would you agree?)
Oil change
Always use wot when cold
Limit rpm to 2500 when cold
Limit rpm to ~3000in general whenever possible
Limit high speed (80-90milesperhourmax)
Always accelerate smoothly
No kick downs!!! (If you’re overtaking, don’t accelerate until it kicks down, but let off completely shortly, accelerate smoothly and the trans will shift down ONE gear automatically instead of the lowest possible making the chains bounce around and making your tranny go boom)
Have fun!
I drove down to Spain 2000 miles in 2 days last week with a broken in half rear guide and it’s all good just go easy on it.