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Author Topic: Senator A2.  (Read 5371 times)

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grifter

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Re: Senator A2.
« Reply #105 on: 07 April 2017, 15:46:26 »

Sorry to hijack thread a bit but what is the torx size of the head bolts. I do admit to loosing my way with the sizing's of these new fangled fittings! It says 10 on mine but 10 what? I need a smaller length one to get into the back left hand bolt to fully torque up.
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cam.in.head

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Re: Senator A2.
« Reply #106 on: 07 April 2017, 16:47:13 »

on all the early engines they were not torx bolts.they are 12 point spline.size 12 for headbolts and 8 for cam sprocket bolts.6mm allen for front of head.if yours are torx type then 10 will be the size if thats what it says though a t10 torx does look a lot smaller than a no12 spline. best take a bolt to tool shop with you to be sure
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grifter

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Re: Senator A2.
« Reply #107 on: 07 April 2017, 17:46:40 »

on all the early engines they were not torx bolts.they are 12 point spline.size 12 for headbolts and 8 for cam sprocket bolts.6mm allen for front of head.if yours are torx type then 10 will be the size if thats what it says though a t10 torx does look a lot smaller than a no12 spline. best take a bolt to tool shop with you to be sure

T10 looks tiny on ebay, will take bolt to halfords see if I can get a bit.
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Doctor Gollum

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Re: Senator A2.
« Reply #108 on: 07 April 2017, 17:47:55 »

on all the early engines they were not torx bolts.they are 12 point spline.size 12 for headbolts and 8 for cam sprocket bolts.6mm allen for front of head.if yours are torx type then 10 will be the size if thats what it says though a t10 torx does look a lot smaller than a no12 spline. best take a bolt to tool shop with you to be sure

T10 looks tiny on ebay, will take bolt to halfords see if I can get a bit.
Well zoom in then :D
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Onanists always think outside the box.

grifter

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Re: Senator A2.
« Reply #109 on: 07 April 2017, 22:19:32 »

on all the early engines they were not torx bolts.they are 12 point spline.size 12 for headbolts and 8 for cam sprocket bolts.6mm allen for front of head.if yours are torx type then 10 will be the size if thats what it says though a t10 torx does look a lot smaller than a no12 spline. best take a bolt to tool shop with you to be sure

T10 looks tiny on ebay, will take bolt to halfords see if I can get a bit.
Well zoom in then :D

Looks proportionally bigger, but still "small"  ;D
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Doctor Gollum

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Re: Senator A2.
« Reply #110 on: 07 April 2017, 22:23:41 »

Suspect thast you've misread T40 ;)
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Steve Brookman

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Re: Senator A2.
« Reply #111 on: 09 April 2017, 16:34:36 »

As Chris said,
Splined size 12 for the head bolts and 8 for the cam.

Thanks Mark-I'll give it a tap when putting it back on. Very busy for the next week or so , so hope to have it up and running the week after next and then off for an MOT. MOT history looks very good so hopeful nothing major here.

I'm going to use the three stage torque method-It's easy to check if you've missed a bolt-I couldn't check using the angle method and "may" not have tightened them all equally.
 Cleaned up the head and no obvious fault apart from lots of sealant.

Steve
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grifter

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Re: Senator A2.
« Reply #112 on: 16 April 2017, 22:41:00 »

As Chris said,
Splined size 12 for the head bolts and 8 for the cam.

Thanks Mark-I'll give it a tap when putting it back on. Very busy for the next week or so , so hope to have it up and running the week after next and then off for an MOT. MOT history looks very good so hopeful nothing major here.

I'm going to use the three stage torque method-It's easy to check if you've missed a bolt-I couldn't check using the angle method and "may" not have tightened them all equally.
 Cleaned up the head and no obvious fault apart from lots of sealant.

Steve

The 3 stage torque method?
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cam.in.head

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Re: Senator A2.
« Reply #113 on: 17 April 2017, 19:08:23 »

Early cars .hand tight. Then torque to 25.    Then 50.     Then 74lbs. Later models reccommended angle tightening but then later models also have stretch bolts whereas early ones(12splined) can be re-used.
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Steve Brookman

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Re: Senator A2.
« Reply #114 on: 18 April 2017, 09:40:33 »

Home from a week away-will put head on tomorrow.

Steve
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Steve Brookman

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Re: Senator A2.
« Reply #115 on: 19 April 2017, 19:33:46 »

Latest on the Senator.
 
Back from hols so thoroughly cleaned the surfaces. New head gasket and "O" ring.  Me and my brother used my newly purchased block and tackle to gently lower the head down-all torqued up using the 3 stage process- 25, 50, 74 lb foot-even had my brother checking the order and settings. All put back together-thought I'd fill it with water. Drips started to form along the gasket joint on both sides of the head.
 
"Oh bother!" I thought :'(
 
Had a think and the only thing that came into my mind was a faulty Torque Wrench-It's nearly 30 years old-but my brother paid loads for it.
 
I went to Screwfix and bought a new one-all the bolts needed at least another quarter turn before the wrench clicked. Filled with water again-but so far no drips.
 
Hoping this is the problem and may have caused the last one to go tits up.
 
Steve
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Nick W

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Re: Senator A2.
« Reply #116 on: 19 April 2017, 19:57:48 »

If he paid loads for a torque-wrench 30 years ago, it may only need calibrating to get it working properly. Actually, if it's that old it definitely needs calibrating.


I must get my good one done; it was acquired at an advantageous rate so is worth spending a few quid on.
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henryd

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Re: Senator A2.
« Reply #117 on: 19 April 2017, 22:48:53 »

If he paid loads for a torque-wrench 30 years ago, it may only need calibrating to get it working properly. Actually, if it's that old it definitely needs calibrating.


I must get my good one done; it was acquired at an advantageous rate so is worth spending a few quid on.

I've got a snap on one that's 30 years old and still accurate against a new digital version although i do love the way the New one does angle settings
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Steve Brookman

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Re: Senator A2.
« Reply #118 on: 20 April 2017, 13:52:26 »

Hello all,
Got it running this morning-dropped the old oil before starting-adjusted the rockers and then let it run for a while to bleed the cooling system. Changed oil and filter again and put on rocker gasket and rocker covers. Ran it for ages, drove in and out of the car port and all seems ok. Have a slight weep from rocker gasket-it popped out a little-but will do this when engine has cooled down.
So may be ok!

Thanks again for your help.

Steve
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cam.in.head

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Re: Senator A2.
« Reply #119 on: 20 April 2017, 19:06:43 »

Yeah the rocker gaskets can be a little fiddly to keep in place.and the fixing hole sizes tend to be a bit tight to go on i usually 'glue' them onto the cam cover and leave it sat flat on the bench to set a little before I fit it. Glad to hear it might be sorted now after all the hassle.unless you had caught the gasket the first time around it sounds like you may have had it under tightened then.cheers. Chris"..
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