Home 
Home Search search Menu menu Not logged in - Login | Register
> Jensen Healey & Jensen GT Tech > Projects > Engine number 9605

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
Engine number 9605  Rating:  Rating
AuthorPost
 Posted: 08-23-2010 06:50 pm
  PM Quote Reply
1st Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
Pulled the original engine from Ms Jensen last winter, now it's time to tear it down, and hopefully rebuild it. Plan for now is:

2.2 crossdrilled crank and plain lower bearings
More dowels in the bearing ladder
104 cams
Mappable ignition, either ECU or 123\TUNE distributor
45 Dellortos
10.5:1 or 10.9:1 pistons
Lightened flywheel and clutch
Ported head and a valve job

This will cost a fair bit of money, so don't expect quick progress!

I got the engine up on the engine stand last night, and took some pictures of the sorry mess.









--
Joachim

Back To Top PM Quote Reply  

 Posted: 01-19-2011 08:02 pm
  PM Quote Reply
2nd Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
One troubled engine indeed! I have finally got around to starting the teardown properly, last night both cam carriers came off and were dismantled.


#3 plug with strange deposits


Scoring on exhaust cam bearing surface


Exhaust cam carrier bearing surface

The deposits on the plug is probably coolant, the engine was pulled due to a head gasket failure. I can't say how bad that is yet, because I haven't dug that deep yet.

The scoring on the cam bearing surface is in my view bad. The width of the scoring matches the lubrication hole diameter, and practically all 10 bearing surfaces look the same, though the exhaust cam is a lot worse than the intake cam.

I suspect particles in the oil is the culprit, but I don't know when it has happened. The question is: is the cam carrier beyond further use? Should I just get new ones from Lotusbits? The cams are destined for the bucket anyway, the plan is to use 104s.

--
Joachim

Back To Top PM Quote Reply

 Posted: 01-20-2011 09:09 pm
  PM Quote Reply
3rd Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
Uh oh. The head gasket was "fine", but the coolant crystals between the valves of cyl #3 is not. I believe the whole head is clogged up, and that corrosion has eaten its way all the way into the combustion chamber. What do you guys think?


Head full of corrosion products


Coolant crystals at #3

I am afraid this head is beyond repair? So heed the advice and change your coolant every now and again!

--
Joachim

Back To Top PM Quote Reply  

 Posted: 01-21-2011 11:03 pm
  PM Quote Reply
4th Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
Teardown continuing, and getting worse!


Big end bearings are well worn


All the piston skirts are scored


#2 piston has a lot of rust in the ring grooves


#2 bore

I guess all this goes on the experience account. Over the last three years, I have learned a lot about cars and engines...

--
Joachim

Back To Top PM Quote Reply

 Posted: 01-28-2011 08:02 pm
  PM Quote Reply
5th Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
Final chapter of the teardown, it doesn't get better...


Lower bearings 3 and 4 were the worst


Upper bearing #1


I think the crank would need a grind if I am to use it again

Could it be that the crank has been ground once before? All the bearings are from Vanderwell, and were marked 010 followed by a four digit number. Can anyone shed any light on this?

--
Joachim

Back To Top PM Quote Reply  

 Posted: 01-30-2011 01:59 am
  PM Quote Reply
6th Post
pbahr
Member


Joined: 04-15-2005
Location: Moorestown, New Jersey USA
Posts: 198
Status: 
Offline
Joachim,

That engine looks pretty bad.  I have a head if you want to pay for shipping..........

YELODOG

Back To Top PM Quote Reply

 Posted: 01-31-2011 05:37 pm
  PM Quote Reply
7th Post
subwoofer
Member
 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 583
Status: 
Offline
Thanks for the offer, Pete! At the moment I think I'll just clean all the usable parts up and put them on a shelf in the garage while I save up for the rebuild.

I hope I will be able to afford a Garry Kemp or Lotusbits head in the not too distant future, but there is lots of work ahead before a new head can be fitted.

--
Joachim

Back To Top PM Quote Reply  

Current time is 01:50 pm  
> Jensen Healey & Jensen GT Tech > Projects > Engine number 9605 Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems