My findings after removing head!

Simon.h · 22nd March 2014, 18:49

Hi all,
I removed the cylinder head today on a K-series because its been leaking coolant down the block. Found a MLS gaskets been fitted, see- http://www.the75andztclub.co.uk/foru...d.php?t=177615

The liners are not .004 proud but are near .002-.003 on cylinders 1,2 and 4 and no 3 is .001 proud.
Also the face of the head is a bit of a mess and looks like the fire rings have marked it but it does look straight.

Do I have a problem with the this block?

MG Tom · 22nd March 2014, 19:04

You have some protrusion of liners so I'd say you are good to go. - Edited to add, I'd go with an elastomer gasket, I like to see at least 2thou for MLS.

That head would probably benefit from some peening of the fire rings, and maybe go with a shim for the belt and braces approach.

Have you measured the head height to ensure it is within spec for skimming?

danbmx_69 · 22nd March 2014, 19:05

have you turned the engine over by hand with the head off to see if any of the liners are loose?

MG Tom · 22nd March 2014, 19:06

Its a little concerning no1 piston isnt at TDC... Whatever you do DON'T TURN THE ENGINE OVER WITH THE HEAD OFF as you will most likely move a liner.

kaiser · 22nd March 2014, 19:11

Quote:

Originally Posted by MG Tom

Its a little concerning no1 piston isnt at TDC... Whatever you do DON'T TURN THE ENGINE OVER WITH THE HEAD OFF as you will most likely move a liner.

Why should no 1 be on TDC??
As for the pictures in post one, where are the pictures of the leaking area?

Simon.h · 22nd March 2014, 19:11

I set the cams on the timing marks and checked the crank was on the mark before removing the timing belt. And no the crank has not be moved!

Have you measured the head height to ensure it is within spec for skimming? No this is a new one to me! Whats the min height?

Thanks.

Simon.h · 22nd March 2014, 19:14

Quote:

Originally Posted by kaiser

Why should no 1 be on TDC??
As for the pictures in post one, where are the pictures of the leaking area?

Here's the leak before the head was removed-

kaiser · 22nd March 2014, 19:18

Yes, I have seen that, but there should be evidence on the head gasket to support this. Have you found the problem?

MG Tom · 22nd March 2014, 19:22

Quote:

Originally Posted by kaiser

Why should no 1 be on TDC??

Sorry, it shouldn't. I had a mouth before brain moment.

118.3mm is the minimum head height.

MG Tom · 22nd March 2014, 19:25

Just some off topic interest...

The last time I had a head off a k-series I was greeted with this.

Still, the head was OK.

Maybe not then!

I've had better days it has to be said!

22nd March 2014, 19:04	#2
MG Tom Posted a thing or two ex. MG ZT+ Join Date: May 2013 Location: Northampton-ish Posts: 1,484 Thanks: 156 Thanked 98 Times in 95 Posts	You have some protrusion of liners so I'd say you are good to go. - Edited to add, I'd go with an elastomer gasket, I like to see at least 2thou for MLS. That head would probably benefit from some peening of the fire rings, and maybe go with a shim for the belt and braces approach. Have you measured the head height to ensure it is within spec for skimming? __________________ '03 MG ZT+ 1.8T X-Power Grey with Monogram 'WTD' black alcantara trim. [SIGPIC][/SIGPIC] My project thread HERE Last edited by MG Tom; 22nd March 2014 at 19:08..

22nd March 2014, 19:05	#3
danbmx_69 Gets stuck in zt 160 Join Date: Aug 2012 Location: swansea Posts: 970 Thanks: 21 Thanked 62 Times in 43 Posts	have you turned the engine over by hand with the head off to see if any of the liners are loose? __________________ Now 320BHP 407nm 1.8T ZT https://www.the75andztclub.co.uk/for...d.php?t=122691

22nd March 2014, 19:06	#4
MG Tom Posted a thing or two ex. MG ZT+ Join Date: May 2013 Location: Northampton-ish Posts: 1,484 Thanks: 156 Thanked 98 Times in 95 Posts	Its a little concerning no1 piston isnt at TDC... Whatever you do DON'T TURN THE ENGINE OVER WITH THE HEAD OFF as you will most likely move a liner. __________________ '03 MG ZT+ 1.8T X-Power Grey with Monogram 'WTD' black alcantara trim. [SIGPIC][/SIGPIC] My project thread HERE

22nd March 2014, 19:11	#6
Simon.h This is my second home Previously owned- MG ZT V6 160 Y plate Lpg, MG ZT 190 2003 In Rare Celestial Factory Ordered Lpg MG Join Date: Mar 2010 Location: Calne Posts: 4,531 Thanks: 8 Thanked 116 Times in 108 Posts	I set the cams on the timing marks and checked the crank was on the mark before removing the timing belt. And no the crank has not be moved! Have you measured the head height to ensure it is within spec for skimming? No this is a new one to me! Whats the min height? Thanks. __________________ Previously owned- MG ZT V6 160 Y plate Lpg, MG ZT 190 2003 In Rare Celestial Factory Ordered Lpg MG ZT 190 2004 lpg

22nd March 2014, 19:25	#10
MG Tom Posted a thing or two ex. MG ZT+ Join Date: May 2013 Location: Northampton-ish Posts: 1,484 Thanks: 156 Thanked 98 Times in 95 Posts	Just some off topic interest... The last time I had a head off a k-series I was greeted with this. Still, the head was OK. Maybe not then! I've had better days it has to be said! __________________ '03 MG ZT+ 1.8T X-Power Grey with Monogram 'WTD' black alcantara trim. [SIGPIC][/SIGPIC] My project thread HERE

22nd March 2014, 19:18	#8
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	Yes, I have seen that, but there should be evidence on the head gasket to support this. Have you found the problem?