Needing to fit pd150 head bolts to my engine. Someone told me you can do them one at a time and therefore not have to do the head gasket?

Anyone know if this is true? And does anyone know which sequence i should do this? Just standard sequence for removal and refitting?

i would send devonutopia a pm ..... i seem to think it was him that gave some one the sequences etc last time

Could potentially work however it is a bodge and could be a waste of time if it fails. Best bet is to replace the gasket and at least it would give you chance to decoke and clean the inlet etc.

Fair shout. I'll have it all stripped off then

Could potentially work however it is a bodge and could be a waste of time if it fails. Best bet is to replace the gasket and at least it would give you chance to decoke and clean the inlet etc.

being an alloy head i would imagine it would be easy to damage the head removing 1 at a time

Yeah, there is a strict sequence to undo and do up. I have it on a PDF manual.

Actually to undo you do it bolt at a time, completely. If you imagine the headbolts 1 to 5 across the top and 6 to 10 down the bottom you undo them in order 1, 10, 5, 6 (so the 4 corners) then 4, 7, 2, 9, then the middle ones 3 then 8.

To do up they go in opposite order, to 8 then 3, then 9, 2, 6, 4, then 6, 5, 10, 1 - first to 40Nm, then 60Nm, then 90 degree turn, then another 90 degree turn. That last 90 is a bugger too. Needs a BIG wrench.

Any chance you be kind enough to send me the pdf?

^^^^ what Devonutopia said. The reasoning behind the sequence is to help avoid buckling the head.

Any chance you be kind enough to send me the pdf?

I paid good money for those PDFs!

(send me an email address )

I dont think you'd bugger the head one at a time tbh

Legend! Pm sent

Ditto, could I be cheeky and ask if you could send me a copy of the PDF please?

Did this on my blt engine one at a time, done good few k miles now and no coolant loss and still seems tickerdy boo

How much are a set of pd 150 head bolts and what is the advantage of fitting them?

http://www.darksidedevelopments.co.uk/products/pd150-arl-head-bolt-set-10-for-1-9-2-0-8v-tdi-pd-engines.html

£30 from Darkside Developments, prevent head lift with higher boost levels I understand

Head gasket £40 from the same place if you want to do that at the same time.

I'm sure different companies will have differing products / pricing, and hopefully someone will suggest the best.

I guess it's a question of either doing the bolts alone, or replacing the head gasket AND bolts....

http://www.darksidedevelopments.co.uk/products/pd150-arl-head-bolt-set-10-for-1-9-2-0-8v-tdi-pd-engines.html

£30 from Darkside Developments, prevent head lift with higher boost levels I understand

Correct

Though you have to remember Darkside's prices are +VAT and Delivery.

I changed both the bolts and the gasket. I wanted to check my engine fully after my turbo pooped itself.

Luke

Was the HG hard to change? How did you get on?

How much are a set of pd 150 head bolts and what is the advantage of fitting them?

 

Stronger bolt - rated to 12.9 VS 10.9 (don't know what unit of measurement) of the normal bolts.  They get done up just as tight though, but I assume they will "flex" ever so slightly less?

Stronger bolt - rated to 12.9 VS 10.9 (don't know what unit of measurement) of the normal bolts.  They get done up just as tight though, but I assume they will "flex" ever so slightly less?

I'd hazard a guess that it's the tensile strength; ie how much force is needed before it snaps when being pulled.

Grade 10.9 bolts or capscrews have a minimum tensile strength of 1040N/mm².
Grade 12.9 bolts or capscrews have a minimum tensile strength of 1220N/mm².
 

 If you apply too much stress (torque) to a bolt, it will "yield", i.e. it will start to stretch and basically becomes like chocolate - never returning to it original state. The other effect is that the force between the 2 clamped components is relaxed - hence the head gasket leaks.One downside of stronger bolts is that you could apply too much torque when bolting up and pull the theads out of the mating component, be it a nut or cylinder block. Generally in engineering a safety factor is included when torqueing to stop elastic limit being reached.

 

 This is an M24 in graded 8.8 when grade 12.9 should have been used!

Edited 16 October, 201312 yr by KeithCheetham

Head gasket £40 from the same place if you want to do that at the same time.

I'm sure different companies will have differing products / pricing, and hopefully someone will suggest the best.

I guess it's a question of either doing the bolts alone, or replacing the head gasket AND bolts....

 

+cambelt kit if you remove the head

How would one go about just replacing the headbolts?

Loosen and take out all the current bolts in sequence then just put all the new ones in and tighten them up?

Sent from my GT-I9505 using Tapatalk

How would one go about just replacing the headbolts?

Loosen and take out all the current bolts in sequence then just put all the new ones in and tighten them up?

Sent from my GT-I9505 using Tapatalk

 

That's the idea, it depends if you're doing it for prevention or cure, if cure then you should definitely fit a new HG since the old one will have been damaged by blowby during head lift.

I paid good money for those PDFs!

(send me an email address )

Jason is their any chance of sending me the PDF file also pretty please? As I would like to get these fitted before my hybrid PD150 goes on ideally. Let me know, cheers.