Threadlocker required on the cylinder head bolts?

glowa · Mar 25, 2015

I am just installing low compression head from RK to compliment the BD turbo

I removed the OEM head but there was no threadlocker as far as I can see, is there supposed to be one? Also what is this black gunk (silicone??) around the bolt head?

roni87 · Mar 25, 2015

No

I had the black gunk as well... Do not loctite them in.

Reg2view · Mar 25, 2015

Head bolt Sealant.

OnlyPolaris · Mar 25, 2015

no thread locker but you need to put gasket maker around the head of the bolt before you thread them in and tighten them. Its so coolant doesn't seep out around the bolt shoulder.

glowa · Mar 26, 2015

There is a special page in service manual - fastener torque guide, it also says if a sealant, threadlocker or anti-seize is necessary on a given bolt, but by the head cover bolts in the chart it only lists torque values without any sealant or threadlocker requirement. The only other location in the manual mentioning head bolts (head bolts are the same as cover bolts right? I am just confirming naming) says on a disassembly process page and I quote "Loosen all, then remove all head cover fasteners. Clean the fastener threads to remove any thread locking residue.". I asked question here because on my bolts there was no thread locking residue whatsoever. The head bolts are not mentioned anywhere else in the service manual, I Know cause I read it at least twice and also used search feature. Is the service manual so inaccurate in such an important matter?

Reg2view · Mar 26, 2015

Yes, the manuals can get abit flakey. Sometimes dead on, particularly for new models with almost completely new parts, but they get squirrelly after a few more motors, suspensions, etc., get dropped in, and they try to cover multiple models in a single manual.

No thread locker on the 8 head bolts. Sealant at the bolt head is not spec'ed, but it will be there on an OEM poo with one piece heads. A very small amount between the bolt head and head will help insure the bolt head doesn't weep coolant. You may find the same issue with the bleed screw, too.

glowa · Mar 26, 2015

so I did put a gasket maker around the bolt head (loctite product), I did test it afterwards and nothing is leaking

I only hope I did not put too much of it...

NapaMatt · Mar 26, 2015

glowa said:
so I did put a gasket maker around the bolt head (loctite product), I did test it afterwards and nothing is leaking I only hope I did not put too much of it...

Sounds like ur all good to go!

You can put on a little extra and doesn't matter..

Just doesn't look as "Clean" look.

Search

Threadlocker required on the cylinder head bolts?

glowa

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roni87

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Reg2view

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OnlyPolaris

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glowa

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Reg2view

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glowa

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NapaMatt

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