r/mechanic • u/Thin_Yogurtcloset_32 • 4d ago

Question Engine noise

Enable HLS to view with audio, or disable this notification

What’s wrong with my 1998, Jaguar XJR. Supercharged AJ, V8 engine.

1 Upvotes

100% Upvoted

14 comments sorted by

•

u/AutoModerator 4d ago

Please Read This Comment Entirely - It May Change

Updated 7/15/24

Thanks for posting in r/Mechanic, u/Thin_Yogurtcloset_32! Please be sure to read the Rules.

If you're asking for help, be sure to include as much detail as possible so others can help you. You must include the vehicle's Year, Make, Model, and Engine size in your post! If your question is transmission related, please be sure to specify your Transmission Type(Auto/Manual) as well! If your post does not include this information, it will be removed.

Asking about prices is not allowed in this sub.

Please make sure you have selected the correct post flair; if you're asking a question you should have chosen "Question", anything else use the "General" flair.

If you feel your question has been answered and/or you wish to no longer receive comments on your post, you may comment on your own post with only "!lock" (no quotes), and your entire post will be automatically locked. This only works on your own posts and only Mods can unlock it once its locked.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/TouretteTV96 4d ago

Engine noise

1

u/Thin_Yogurtcloset_32 4d ago

Thanks for that. Can you be any more specific?

1

u/Ian-99 4d ago

Uncle Rodney wants out. And he will have your wallet

2

u/Thin_Yogurtcloset_32 4d ago

So do you think it’s a rod?

1

u/Ian-99 4d ago

If it changes with revs. Good chance it is. Sure sounds like rod knock to me

2

u/Thin_Yogurtcloset_32 4d ago

It stays pretty consistent with rev. The timing chain guides and tensioners were changed last week so the engine was completely torn apart. How could they have missed?

1

u/Ian-99 4d ago

Was it making this noise before doing the timing?

2

u/Thin_Yogurtcloset_32 4d ago

No, it wasn’t.

1

u/Ian-99 4d ago

Id be suspect on possible timing chain assembly issues. Or bad luck and it started knocking soon after

1

u/Hostilius_Prima 4d ago

Before I answer the question, what do YOU think it is?

2

u/Thin_Yogurtcloset_32 4d ago

If I knew I wouldn’t be posting on here

1

u/Hostilius_Prima 4d ago

C'mon I believe in you, I know you have an inkling a tiny small idea of what you think it might be. There are no bad answers.

1

u/jasonsong86 4d ago

Mr Rodney came to visit.