Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125
I’m just wondering now what head gasket set is best...and what to avoid?
30th Dec 2020 9:30 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10367
The important thing is to get the correct headgasket thickness.
Note the tabs in the front of the gasket sticking out. It was in your picture
This denotes the thickness required.
I’ve lost track of the engine rebuilds on here. But don’t you want to be sure which side is at fault before removing head bolts. Otherwise your wasting a lot of time and pain
Otherwise you would want to remove injectors on other side and see if you can see coolant.
30th Dec 2020 9:57 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10367
Pete K wrote:
Yeah remove injectors
But get a kit off eBay where you apply pressure to the header tank cap.
Then look thru the injector holes for orange coolant appearing or stick a screw driver down
Or turn the engine manually and see which hole shoots water out like a fountain
30th Dec 2020 9:58 pm
Jonmoore1970
Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125
The head seems to be dead flat.
31st Dec 2020 6:37 pm
Jonmoore1970
Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125
31st Dec 2020 6:38 pm
Jonmoore1970
Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125
Any advice?
31st Dec 2020 6:40 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Might be my eyesight, but looks like it has been blowing between them two cylinders?
Any engineering shops still left open near you? if so get a hot pressure test done, or go with another head.
31st Dec 2020 6:59 pm
Kviasen
Member Since: 24 Dec 2020
Location: Norway
Posts: 107
Always when there is water there would be risk of hydraulic lock and bendt conrods.
Measure all piston height above the block, they should all be equal.
If not there will also have to be a bottom end and conrod replacement.
Remove coolant and take another picture please.
31st Dec 2020 7:14 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26702
Those 2 pistons in the water look clean and washed.
31st Dec 2020 7:19 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10367
Kv - Removing the head causes the cylinders to fill with coolant.
You can remove a bolt to drain it before removing head
31st Dec 2020 7:42 pm
Jonmoore1970
Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125
I heard the cylinders filling when moving the head
31st Dec 2020 7:50 pm
Jonmoore1970
Member Since: 19 Apr 2020
Location: Wokingham
Posts: 125
New
So the head has writing on it and a gasket with 5 notches on it.....I’m thinking that it’s a second hand head, maybe skimmed with a thicker gasket?
I can get hold of a known good head for £100 from a Disco 4 (cheaper than having this one tested?)....if I went that route what gasket would I get?
how many notches do they have from the factory?....and what make is oem?
1st Jan 2021 9:50 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10367
So in the case of the tdv6 headgasket thickness is not all about skimming.
When the engines were new the piston height varies and based on this the gasket thickness is selected.
Therefore if no piston changes you could stick to what you have fitted.
Yes someone could have fitted thicker.
Thicker is safer than too thin
1st Jan 2021 10:36 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10367
Is the other bank gasket got the same number of notches ?
Has it got writing on the head ?
PM me your email address and I will send you manual with torque figures etc
1st Jan 2021 10:39 am
Kviasen
Member Since: 24 Dec 2020
Location: Norway
Posts: 107
Original gasket is selected by calculating the piston protrusion average, on the 2 engines i have overhauled the gaskets was 3 notches.
If the head is not skimmed you can use the same notches.
If a head is scimmed 0,1mm the notches is reduced to 2 notches and so on.
If the head must be skimmed more than lets say 0,2mm i would throw it in the bin because it is warped.
Who that makes the orginal gaskets probably changes over time but what most use is Elring or Wictor Reinz they supply all the variations in size and are good brands.
Head bolts will also have to be changed.
Since there was water in the cylinders you would have to measure protrusion just to see if conrods are straight.
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