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Post by dave1800 on May 23, 2022 0:53:14 GMT
Dave, just a quick reminder that setting the end float is critical so you will need to find someone familiar with the set up. In the 1968 London-Sydney Marathon a rear wheel bearing was over tightened and it seized ripping the whole suspension carrier off the car. David Out in Mo yesterday. Came home to the unmistakable smell of very hot grease. Offside rear wheel too hot to touch New bearing being dispatched by Tony Dave |
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UMO 406G
May 23, 2022 5:36:02 GMT
via mobile
Post by peppib on May 23, 2022 5:36:02 GMT
Thanks David. Will act accordingly
Dave
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UMO 406G
Jul 16, 2023 14:54:53 GMT
via mobile
Post by peppib on Jul 16, 2023 14:54:53 GMT
Took Mo to pub at lunchtime because it wasn’t raining. On the way home she blew the head gasket. Oh, bother (or words to that effect)
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Post by dave1800 on Jul 16, 2023 15:41:27 GMT
Sorry to hear that Dave. Any idea of the cause?
David
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UMO 406G
Jul 17, 2023 5:58:21 GMT
via mobile
Post by peppib on Jul 17, 2023 5:58:21 GMT
No idea yet David
My hands won’t even let me hold a spanner nowadays so will have to seek help to investigate.
Dave
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Post by dave1800 on Aug 8, 2023 7:18:38 GMT
Any joy yet getting the head gasket sorted? There may even be some sunny days of summer left if we're lucky.
David
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UMO 406G
Aug 9, 2023 4:59:36 GMT
via mobile
Post by peppib on Aug 9, 2023 4:59:36 GMT
Managed to get a mobile mechanic to come 2 weeks ago David and in 3 hours a new head gasket was fitted. Torquing the final head bolt it sheared. Several rude words uttered
New gasket set and bolts obtained and he is returning next Tuesday to do it all again
Old gasket had blown between cylinders 2 and 3. Oddly no water had leaked into the oil - it had all blown out through the exhaust as white smoke
Such is life
Dave
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UMO 406G
Aug 15, 2023 17:35:33 GMT
via mobile
Post by peppib on Aug 15, 2023 17:35:33 GMT
David
Mobile mechanic came again today and new head gasket fitted. He has just texted me to say he torqued the bolts to 40 ft/lb and is wondering if they are tight enough. He wants to tighten them to 70 ft/lb. I think the manual says 45
What do you think?
Dave
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Post by Penguin45 on Aug 15, 2023 23:26:30 GMT
45 - 50 lb/ft is normal. I work for a Mini specialist who re-torque the head ("A" series engine) after the first heat cycle and then again at 500 miles.
C.
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UMO 406G
Aug 16, 2023 5:41:39 GMT
via mobile
Post by peppib on Aug 16, 2023 5:41:39 GMT
Thanks Chris
I have an awful feeling about this head gasket. When I first started Mo I could see water spout out of the radiator and very soon the engine was hot, both signs of a blown gasket. It didn’t register in my old brain until mechanic texted me to ask to come back and increase the torque
If I can manage, I will check again this morning to see if there is any water ingress in the oil
At £200 a time, plus parts, this repair is getting expensive
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Post by dave1800 on Aug 16, 2023 5:55:14 GMT
Hi Dave Do you have a w/s manual? As Chris indicated 45-50 ft bs is the correct torque. Worth checking that the head surface is flat when it comes off, yet again. Certainly don't let the mechanic torque it up to 70. It's good practice to change the oil after a head gasket change. David EDIT: I have found a reference to a TSB recommending 50-55 lb ft for the MGB issued in 1975. Scroll down for a copy. Here TSB 75a5Thanks Chris I have an awful feeling about this head gasket. When I first started Mo I could see water spout out of the radiator and very soon the engine was hot, both signs of a blown gasket. It didn’t register in my old brain until mechanic texted me to ask to come back and increase the torque If I can manage, I will check again this morning to see if there is any water ingress in the oil At £200 a time, plus parts, this repair is getting expensive |
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UMO 406G
Aug 17, 2023 5:29:41 GMT
via mobile
Post by peppib on Aug 17, 2023 5:29:41 GMT
Yes I have both the Haynes and BMC red binder workshop manuals
On his first visit I told the mechanic 45 to 50 and it was the final turn to 50 when the head bolt sheared. He didn’t say anything when he was working the second time. It was only when he texted me that evening that I knew he only torqued to 40. Head now has all new bolts
I have new oil and filter but want to be sure first the job’s a good un. No mayonnaise visible so running up to temperature should be OK. He did check to make sure the head hadn’t warped
Dave
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Post by andrewa on Aug 18, 2023 11:17:15 GMT
Fingers crossed you've nailed it - let us know how you get on when you a mo!
Cheers
Andrew
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bandit1
Member
Posts: 34 
Attribute: Technical Expert
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Post by bandit1 on Aug 22, 2023 15:33:49 GMT
David Mobile mechanic came again today and new head gasket fitted. He has just texted me to say he torqued the bolts to 40 ft/lb and is wondering if they are tight enough. He wants to tighten them to 70 ft/lb. I think the manual says 45 What do you think? Dave If he puts 70 ft/lb on em they will certainly shear/strip, its 45 ft/lbs for a reason, I would be wary of a mechanic who questions the manufacturers setting !!! |
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UMO 406G
Aug 23, 2023 5:10:08 GMT
via mobile
Post by peppib on Aug 23, 2023 5:10:08 GMT
He is coming again this afternoon and no way will I let him torque to 70. Apparently a colleague of his suggested the 70 but I have already told him no
Will report after he has been
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Out in Mo yesterday. Came home to the unmistakable smell of very hot grease. Offside rear wheel too hot to touch
