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Cylinder head tools
#1
Hi chaps/chapesses

I've posted on FB about taking off my cylinder head  and received many replies / recommendations about taking the engine out to do the job.

So no need to discuss that here .

Does anybody have  / and would be willing to lend me the cylinder head tools namely the Sprocket tool J28858 

And the liner tool J28852.


Can anybody help out here - I'll pay all postage to get them to/from me ?

Thanks.
Vin 11789 (probably #50 of the Middle East batch of 50)
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#2
Don't have the liner tool, but you can easily make one with some bolts and some bar. I do have a Volvo sprocket tool Pt No: 9995213 (same thing) your welcome to borrow. So long as it returns!

Chris
Membership Secretary DOC UK
2018's DeLorean event: http://deloreans.co.uk/forum/showthread.php?tid=5715
VIN#15768 Ex VIN#4584 1972 Bond Bug.
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#3
(26 Feb 2019, 10:40)Chris Williams Wrote: Don't have the liner tool, but you can easily make one with some bolts and some bar. I do have a Volvo sprocket tool Pt No: 9995213 (same thing) your welcome to borrow. So long as it returns!

Chris

Brilliant ...... yes please Chris. 
I will return it of course and will look into making a replica of it too.

I'll pm you my address.

Thanks 

Kevin
Vin 11789 (probably #50 of the Middle East batch of 50)
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#4
No prob, it'll be in the post. Out of interest (I may have missed it on Facebook) how have you/what makes you think you have a head issue? Did you get all the timing issues sorted?
Chris
Membership Secretary DOC UK
2018's DeLorean event: http://deloreans.co.uk/forum/showthread.php?tid=5715
VIN#15768 Ex VIN#4584 1972 Bond Bug.
Reply
#5
(27 Feb 2019, 22:02)Chris Williams Wrote: No prob, it'll be in the post. Out of interest (I may have missed it on Facebook) how have you/what makes you think you have a head issue? Did you get all the timing issues sorted?
Chris

One of the spark plugs (new ones too) decided to shed some of it's ceramic jacket into #3.
I put an endoscope down there and there is also evidence of ceramic shards.
I tried various countermeasures such as vacuum, grease on the end of a stick - no joy!!!

There was also some water in #1. It was fresh water and the bore looked great - you could see the honing marks - there was no rust or corrosion in there.

To be honest that could have been water in the spark plug cavity and when it was removed the water went into #1.

At the end of the day - with these two issues , you have to ask yourself if you would take the head off, and I'm sure most people would.

Apart from the head - all the other nuts n bolts and fittings have already been removed - the back of the car is still off and it makes a lot of sense to do the head. Heck, somebody even gave me a gasket set for the side I'm working on.

Great gesture - a big thanks for that !!!

Oh and a very good friend of mine skims heads - so he will check it out for me.

I'll feel a lot more confident about it when it's done - and will learn how to do a DeLorean head - let's just hope those liners stay in place eh?

Finally, I'll remove the new water pump and take out the core plug underneath it in the vod. I can do that trick of putting a long bolt down that void and check that "TDC is actually TDC "on the engine plate that use when you fire a timing light - who knows - somebody may have moved that? With everything removed I can double check the distributor cap setting as it was out - but I believe that it's spot on now.
Vin 11789 (probably #50 of the Middle East batch of 50)
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#6
Quote:One of the spark plugs (new ones too) decided to shed some of it's ceramic jacket into #3.
I put an endoscope down there and there is also evidence of ceramic shards.
I tried various countermeasures such as vacuum, grease on the end of a stick - no joy!!!
Ahh Ok, I must have missed that bit. Good luck and keep us posted.
Chris
Membership Secretary DOC UK
2018's DeLorean event: http://deloreans.co.uk/forum/showthread.php?tid=5715
VIN#15768 Ex VIN#4584 1972 Bond Bug.
Reply
#7
Here's the latest update - and it's not good.

After removing the head it became clear that engine had had some work done on it by a previous owner.
The cylinder bores looked amazing - honing marks were still in existence.
there was very little crud inside the block.

i took the head to my engineering buddy who rebores blocks, regrinds cams and skims heads.

The Delorean manual says that the cylinder head height should be between 4.373" - 4.379"

... mine is 4.353 which means it was skimmed 20 thou. Also there was a deflection (warp) between 0.002 and 0.004"
I would bet that the other head is in the same state.

So I think the best option is to get some good second hand ones as new ones are rare - still available but out of my range .. let's see if I can post photos and if anybody can help me out on this one I'd be eternally grateful.

This car deserves to be saved as it was one of a unique batch of 50. (nope - inserting pictures is a PITA (& I used to train IT lol)

[attachment=536]
Vin 11789 (probably #50 of the Middle East batch of 50)
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#8
Spud,

Was it just the broken plug end that got you looking in there in the first place?  Or did you suspect something else was wrong?  

What I am thinking is that perhaps some heads could just have a bit of twist in them...that could well be overcome by tightening them down properly (in the right order) and with a good quality new head gasket .........it may work fine...perhaps?  

If it were me,  I'd give it a try ...what have you got to loose...a couple of days labour and a new head gasket?
Chris Parnham in Derby  chrisparnham@live.co.uk 
RHD Auto MGJ 126Y (AXI 1699)
Outlander PHEV 4X4
MG ZS EV....Full Electric SUV.

DOC Club Historian 
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#9
(13 Mar 2019, 09:32)Chris P Wrote: Spud,

Was it just the broken plug end that got you looking in there in the first place?  Or did you suspect something else was wrong?  

What I am thinking is that perhaps some heads could just have a bit of twist in them...that could well be overcome by tightening them down properly (in the right order) and with a good quality new head gasket .........it may work fine...perhaps?  

If it were me,  I'd give it a try ...what have you got to loose...a couple of days labour and a new head gasket?

Hi Chris.
The main reason was that two lumps of spark plug ceramic had entered number 3 - there were also small shards in there. I could see the bits with an endoscope. Tried all ways to remove them - and I mean all ways!!

Then I put the 'scope down #1 and there was a small puddle of water (defo water - I tested it).

Now when I got this ex-Dubai car - the otterstat was bypassed and the fans were on permanently with the connections being bridged.
Also this car had hardly been used - neither in Dubai nor in the UK (not even UK registered) 

You have to ask yourself "Why"?

So if I was a betting man, I would bet that this car had an overheating issue - and the heads have previously been skimmed by 20 thou.

..... also, I could not get it to start when I got it as the timing was so far out and backfired a lot - maybe that was the cause of 2 of my new Bosch Sparkplugs cracking?

So I decided to take the heads off - hey it was pretty painless to do as I have all new exhaust, water pump etc - so ancilliary removal was painless.


Stop Press.
Donald John Steger in the USA who has extensive cylinder head knowledge assures me that I can easily have 4 thou shaved off the head :-) 

P.S. I still need a good ungrooved flat bonnet ;-)
Vin 11789 (probably #50 of the Middle East batch of 50)
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