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Best Option for Dropped Valve Seats? Repair or Replace?

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Old 10-11-2012, 02:11 AM
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Default Best Option for Dropped Valve Seats? Repair or Replace?

It looks like my XJS has suffered a dropped valve seat.

What is my least expensive option? Find another engine? Repair the head/s?

If repairing the heads are the most economical, can the heads be removed while the engine remains in place or is removing the engine the best way to do the repair? Also, can someone recommend a shop that can repair the heads?

Please feel free to offer any suggestions to help get my V12 back on the road. (I really have no interest in a V8 conversion).

Thanks!
Mark
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1989 Jaguar XJS Convertible, 5.3L V12
Color: (AGA) Satin Beige
Trim: (AFW) Barley

1990 Jaguar XJS Convertible, 5.3L V12
Color: (PDH) Black
Trim: (AEM) Magnolia

1989 Jaguar XJS Convertible, 5.3L V12
Color: (HEN) Jaguar Racing Green
Trim: (AFW) Barley

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Old 10-11-2012, 02:19 AM
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While it is just about possible to remove the heads while the engine is in the car, I believe that this is SO difficult that it is much better to remove the engine and then do the work.

If you can get an engine second hand that is good, this is easily the quickest and almost certainly the cheapest way to way to get going again.

Then, you can work on the old engine at leisure, and even end up rebuilding the while thing as funds permit!

Greg
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Old 10-12-2012, 07:13 AM
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I know you are in CA, but you'd be surprised how inexpensive you can find these V12s..

Here's a link to someone who's been selling his V12 and tranny for months on a local Craigslist ad. I don't know anything about this person or product, but I did want to point out that they are out there...

Jaguar V12 XJS Engine and trans
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Old 10-12-2012, 08:47 PM
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ive got a set of heads for sale. valves, springs, lifters, cams, all of it.
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V12 parting out
Ianfromcraigslist@yahoo.com

85 XJS L67 & T5 swapped
12psi, fully gutted, slammed to the dirt
two broken autos, one broken manual, and two broken flywheels so far
http://m.jaguarforums.com/forum/showthread.php?t=80512
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Old 10-13-2012, 09:08 PM
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Quote:
Originally Posted by M90power View Post
ive got a set of heads for sale. valves, springs, lifters, cams, all of it.
PM Sent.
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1989 Jaguar XJS Convertible, 5.3L V12
Color: (AGA) Satin Beige
Trim: (AFW) Barley

1990 Jaguar XJS Convertible, 5.3L V12
Color: (PDH) Black
Trim: (AEM) Magnolia

1989 Jaguar XJS Convertible, 5.3L V12
Color: (HEN) Jaguar Racing Green
Trim: (AFW) Barley

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Old 10-14-2012, 02:36 AM
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Gregs advice is really good. My XJC is getting a replacement engine out of an abandoned rusty project. But because the car is an unrestored previous multiple prize winner I want to salvage the original engine if possible
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Old 10-14-2012, 10:22 PM
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Ygpm
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V12 parting out
Ianfromcraigslist@yahoo.com

85 XJS L67 & T5 swapped
12psi, fully gutted, slammed to the dirt
two broken autos, one broken manual, and two broken flywheels so far
http://m.jaguarforums.com/forum/showthread.php?t=80512
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