Hgf

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aussielander

New Member
Posts
468
Location
Western Australia
Ok after having clasic symptoms of hgf, Loss of coolant and steam out of exhaust I've removed the head and cant see any damage to the gasket or head. slight warpage but thats all. Oil is still clean. anyone have any ideas?. can the gasket go with no obvious signs?.
Thanks Aussie
 
Ok after having clasic symptoms of hgf, Loss of coolant and steam out of exhaust I've removed the head and cant see any damage to the gasket or head. slight warpage but thats all. Oil is still clean. anyone have any ideas?. can the gasket go with no obvious signs?.
Thanks Aussie

Hey Aussie.....How badly is the head warped? 0.05mm is the allowance with max of 0.2mm skim.

Are there any other pitted or scores? Check your liner heights too

Look here: at technical bulletin 0036

http://www.landyzone.co.uk/lz/f9/fr...-data-36863.html?highlight=k-series+more+data

LR condemn the head if any defect, it was more cost effective for them to do so, rather than get the item skimmed or serviced.
 
only checked it with a straight edge and eye, no pitting or scoring at all. Looked perfect except for the warpage


Shine a spotlight behind the straight edge to get a better view, slightest chink of light shining through would suggest warpage.

Try some feeler gauges on the distorted part, checking the longitudinal, lateral and diagonal sections of the head.

A piece of A4 paper normally is about 0.08mm, not much when you think about it.

If the head is truly warped then this would have been the cause of hgf. You would think that they would come up with a gasket that compensates any discrepencies along the head, sadly not the case.

Hope you get it sorted
 
You would think that they would come up with a gasket that compensates any discrepencies along the head, sadly not the case.

The new 2 part gasket is a little more tollerant than the old type one, I've fitted heads back on that were totally shot cos the customer didn't want to pay for a new head, and they've had no problems afterwards!
 
The new 2 part gasket is a little more tollerant than the old type one, I've fitted heads back on that were totally shot cos the customer didn't want to pay for a new head, and they've had no problems afterwards!
Have to agree - the new gasket makes much more sense along with the new hoses,not sure about the oil rail tho.
 
I havent had a lot of experience of modern engine hg replacement.
but over the years i have done just a few.
Of course there are loads of different types, but I have rarely done one more than once.

there used to be a time when you had to take yer new motor in to have the head tightend down.
Someone may correct me, but I dont think that this applies anymore.


Also, whenever I'm doin a hg, I am quite fussy about sticking to the set pattern regarding torqin down.
Which includes numerous repititions of the correct pattern.
There are also the cheaper bendy bar torque wrenches, which I wonder if they are up to the job, though i have used em.

Also, I have found that even with an expensive clicky 1, there can be quite a difference in setting, depending on how quick or slowly you use it.

From what I have seen of most hg's, they aint changed much.
So I am thinkin why does there seem to be so many probs with em.
It aint just LR stuff surely.

Maybe all the hgf is perhaps down to original installation+ not re-torqued,and/or method of replacement in later life.
Not just, its a flander/RR etc, thats what they do.

just my two penneth on the subject. maybe only worth 1p!!
 
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