1990 Jaguar XJS no oil pressure

Tiny
LHLMU
  • MEMBER
  • 1990 JAGUAR XJS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 104,919 MILES
We have just rebuilt the cylinder head as of the overheating. We started the engine after all installation, there was about 3 ~ 4 kg oil pressure. After 20 min, I found oil pressure on the guide is near 0, and when the rpm raises high the oil light turns on.

We think there is still some water left the oil case as you know the oil case's shape. Now do we have to remove the oil case so that the oil pressure relief valve can be reached?

Any suggestion will be welcome!

Tony
Do you
have the same problem?
Yes
No
Thursday, October 21st, 2010 AT 4:19 AM

5 Replies

Tiny
DOCFIXIT
  • EXPERT
To get oil pan off in car need to remove front suspension unit. Try installing mechanical oil guage to verfiy pressure. Did banjo fitting on rear of head and oil lines removed and cleaned? How long did car operate with water in oil?
Was this
answer
helpful?
Yes
No
Thursday, October 21st, 2010 AT 10:43 AM
Tiny
LHLMU
  • MEMBER
Thank you so much for your help.

Yes, we did install a mechanical oil guage, but there was no oil pressure. Last night we thought there might be some thing wrong while installing the cylinder head and decided to remove the oil pan next morning.

This morning we disconnected any connection upper part of surrounding the engine and removed the valve cover. We found a piece of clothe attaching the chains like we thought last night. We cranked the engine by hand trying to do the cleaning upper part.

Lowering the subframe like front suspension unit was carried. The oil pan was able to remove and is cleaned just now. Yes the left small piece of clothe made the cause, not the overheating causing water to into the oil pan. Next time there should be a big piece of clothe, not some many small pieces of clothe to cover the chains while removing and installing the cylinder head.

We were so lucky to notice the problem happen just 20 minutes after first time we finished the work and run the engine on.

Again thank you all.
Was this
answer
helpful?
Yes
No
Thursday, October 21st, 2010 AT 11:36 PM
Tiny
DOCFIXIT
  • EXPERT
So a shop rag was left in engine?
Was this
answer
helpful?
Yes
No
Friday, October 22nd, 2010 AT 3:20 PM
Tiny
LHLMU
  • MEMBER
Yes, your are right. A VERY SMALL BLACK PIECE OF SHOP RAG WAS LEFT BETWEEN THE LOW PART OF UPPER CHAIN AND THE RIGHT WALL OF CHAIN COVER.

We did check if there was any shop rag left, but we missed one.

Yesterday evening we managed to finish the work. Finally the engine worked fine.
Was this
answer
helpful?
Yes
No
Friday, October 22nd, 2010 AT 11:15 PM
Tiny
DOCFIXIT
  • EXPERT
That is amazing I would frame that piece of cloth. In my 50 yrs. Of wrenching never saw this. Had a left shop rag drop on exhaust header and set a XJS on fire.
Glad you resolved and are back motoring.
Was this
answer
helpful?
Yes
No
Sunday, October 24th, 2010 AT 1:53 PM

Please login or register to post a reply.

Recommended Guides