NigeEss
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| posted on 11/5/06 at 11:28 PM |
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Sorry, but K series HGF again.
Was asked this afternoon to price a HG for an S reg 416, plastic inlet manifold, 42k
on clock. Emptied sump into rad, alledgedly no overheating.
Having read the threads on this subject I'm unsure as to whether I should get the head
skimmed and do I replace the head bolts ?
Sorry to revive this issue 
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nitram38
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| posted on 11/5/06 at 11:29 PM |
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both!
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NigeEss
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| posted on 12/5/06 at 07:00 AM |
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Thought so.
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flak monkey
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| posted on 12/5/06 at 07:27 AM |
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You dont have to replace the long stretch bolts as long as they are within the tolerance given in the manual.
However you will need to have the head skimmed.
Sera
http://www.motosera.com
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britishtrident
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| posted on 12/5/06 at 07:48 AM |
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No on both counts.
Fitting new head bolts on 1.6 and 1.8 engines fitted with alloy sumps can cause more problems, if you do fit new bolts they must be the latest spec
XPart Genuine Rover parts.
Head bolts can be reused several times on K16 engines without any problem --- but they should always be checked for fitted length even new bolts
should be checked for fitted length on the 1.6 and 1.8 engines. Procedure is given in the Haynes manual.
Clean the bolt threads with kerosene/wd40/gas oil but DON'T OIL allow to drip dry before fitting
Heads rarely warp on these engines.
Head need only be lightly skimmed if there is evidence of pin prick corrosion around the bore rings.
Inlet manifold gasket should be replaced as this is the most likely cause of the original problem.
Rover used 2 different types of thermostat on these engines if the car has a conventional thermostat not the external BMW style fit a new XPart
(official Rover) thermostat and remove the joggle pin from the beed hole in the stat -- thermostat should be fitted with the upper most. The bleed
hole can be enlarged to aid bleed.
Always use the latest spec gaskets
When torquing follw Rover procedure to the letter - using an ****accurate low range torque wrench*** for the first state.
Cam carrier seal is a Locitite sealant supplied via Xpart -- always use the official stuff.
When re-fitting the cam belt carefully check the condition of the roll pins that drive the sprockets and check the bottom sprocket is tight on the
crank.
When refitting the inlet manifold put an extra washer under each nut and tighten the nuts to the correct torque following the latest rover tightening
order.
When filling with coolant check the type before re-filling 2 types were used blue-green glycol or orange.red OAT they don't mix -- if you
change the coolant type the engine should be acid flushed.
Comma make a suitable OAT coolant.
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muzchap
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| posted on 12/5/06 at 09:24 AM |
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as BRITISH TRIDENT says!
Genuine Head Bolts if you do need to replace - check the length to see if they still in tolerance 
My mate does a lot of Rovers / Elises and sometimes (earlier models) he's noticed that if the head needs exessive skimming, you can buy a
Stainless Steel Saver Plate - its secured in with metal weld - same stuff as you do the cam carrier with
Good luck
------------------------------------
If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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MikeRJ
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| posted on 12/5/06 at 10:10 AM |
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Not convinced about the "head saver" plates. My dad mentioned that he's already had a few cars in with HGF that have had the head
saver plate fitted.
What I can't understand is how it's supposed to seal against the head, is the loctite sealant really up to withstanding combustion
pressures and temperatures?
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wildchild
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| posted on 12/5/06 at 10:44 AM |
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quote:
Originally posted by britishtrident
...remove the joggle pin from the beed hole in the stat
now you're just making things up to confuse everyone! 
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britishtrident
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| posted on 12/5/06 at 11:06 AM |
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I should add on this engine it sounds like the silicone tracks on the gasket have blown out -- can be quite spectactular when it happens but not
major problem to fix as long as the engine hasn't been cooked.
[Edited on 12/5/06 by britishtrident]
[Edited on 12/5/06 by britishtrident]
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NigeEss
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| posted on 13/5/06 at 12:42 PM |
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Thanks for all the info guys.
Britishtrident, yep it was a spectacular failure, oil pi**ng out the header tank and there's
so much in the cooling systen I have no idea what colour the antifreeze is !
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