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Search took 2.65 seconds. Search: Posts Made By: RobFrost

Forum: 911 Engine Rebuilding Forum

09-14-2025, 07:31 PM

Replies: 35

2.2t rebuild questions

Views: 1,495

Posted By RobFrost

Density equals mass over volume. Sent from...

Density equals mass over volume.

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Forum: 911 Engine Rebuilding Forum

09-14-2025, 07:30 PM

Replies: 35

2.2t rebuild questions

Views: 1,495

Posted By RobFrost

I bought the AA piston package and I'm happy with...

I bought the AA piston package and I'm happy with my choice. Instead of oil squirters I have notched my con rods on the big end, to squirt oil onto the piston crowns.

An experienced UK engine...

Forum: 911 Engine Rebuilding Forum

09-14-2025, 03:55 AM

Replies: 13

2.2E engine won't turn on assembly

Views: 619

Posted By RobFrost

Resolved today, I believe. All my crank journals...

Resolved today, I believe. All my crank journals are original factory spec. The bearings I bought as standard but did not check the part numbers myself. Upon removal I see they bear the numbers 901...

Forum: 911 Engine Rebuilding Forum

09-08-2025, 09:48 PM

Replies: 13

2.2E engine won't turn on assembly

Views: 619

Posted By RobFrost

Ok thanks for the advice. I didn't torque it...

Ok thanks for the advice. I didn't torque it fully down. I wonder if it will help to torque it down fully.

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Forum: 911 Engine Rebuilding Forum

09-07-2025, 01:32 PM

Replies: 13

2.2E engine won't turn on assembly

Views: 619

Posted By RobFrost

2.2E engine won't turn on assembly

I'm pretty sure this was a working engine before it originally seized.

Detective work pointed to its original car being in a smash, resulting in the engine running dry of oil. A couple of piston...

Forum: 911 Engine Rebuilding Forum

08-03-2025, 06:13 AM

Replies: 1

2.2 rods - heavier side nearer the flywheel?

Views: 167

Posted By RobFrost

2.2 rods - heavier side nearer the flywheel?

There's an error in my Dempsey "how to rebuild..."

It says the rods are symmetrical but that's not true. There's a heavier side and a lighter side. You can see here the shoulder is taller on the...

Forum: 911 Engine Rebuilding Forum

07-27-2025, 02:40 PM

Replies: 64

rocker arm and cam lobe failure

Views: 3,614

Posted By RobFrost

What weight oil were you using, and what...

What weight oil were you using, and what percentage of standard spring force?

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Forum: 911 Engine Rebuilding Forum

07-27-2025, 11:36 AM

Replies: 16

Where should I remove mass from a 1970 con rod?

Views: 742

Posted By RobFrost

So... this is how it went. I'll let you know if...

So... this is how it went. I'll let you know if it lets go!

https://uploads.tapatalk-cdn.com/20250727/5f3db4d17053b6c53e9e5a78d0e96038.jpg

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Forum: 911 Engine Rebuilding Forum

07-24-2025, 11:48 AM

Replies: 64

rocker arm and cam lobe failure

Views: 3,614

Posted By RobFrost

The force on the face of the rocker is greatest...

The force on the face of the rocker is greatest there, closer to the fulcrum.

Not only because it is where the spring is more compressed, but also because the leverage the cam has over the spring...

Forum: 911 Engine Rebuilding Forum

07-15-2025, 02:11 AM

Replies: 15

Cam Tower Rocker Shaft Rebore

Views: 724

Posted By RobFrost

Thanks again, Henry.

Thanks again, Henry.

Forum: 911 Engine Rebuilding Forum

07-15-2025, 01:56 AM

Replies: 16

Where should I remove mass from a 1970 con rod?

Views: 742

Posted By RobFrost

lol Good point Henry, although being precise I...

lol Good point Henry, although being precise I meant a "primary" rod failure whereas this engine looks to have had a primary oil starvation followed by seizing & overheating piston, and finally the...

Forum: 911 Engine Rebuilding Forum

07-14-2025, 02:30 AM

Replies: 15

Cam Tower Rocker Shaft Rebore

Views: 724

Posted By RobFrost

Thanks, that's interesting to learn. How can I...

Thanks, that's interesting to learn. How can I tell, when tightening my rocker shafts, if they are are not gripped property and prone to movement?

Forum: 911 Engine Rebuilding Forum

07-14-2025, 02:22 AM

Replies: 16

Where should I remove mass from a 1970 con rod?

Views: 742

Posted By RobFrost

Thanks Henry. I'll check those end weights and...

Thanks Henry. I'll check those end weights and I'll measure thickness at the spot I propose to remove material. If the heavier one is thicker there I'll be comfortable from a structural integrity...

Forum: 911 Engine Rebuilding Forum

07-13-2025, 11:59 AM

Replies: 15

Cam Tower Rocker Shaft Rebore

Views: 724

Posted By RobFrost

Do the rubber seals that slot in to rocker shafts...

Do the rubber seals that slot in to rocker shafts not work?

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Forum: 911 Engine Rebuilding Forum

07-13-2025, 11:55 AM

Replies: 16

Where should I remove mass from a 1970 con rod?

Views: 742

Posted By RobFrost

Why wouldn't you just weight-balance your...

Why wouldn't you just weight-balance your existing rods?

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Forum: 911 Engine Rebuilding Forum

07-13-2025, 07:00 AM

Replies: 6

What studs in clutch end of case?

Views: 330

Posted By RobFrost

Actually, hark back to when I bought the engine -...

Actually, hark back to when I bought the engine - maybe the studs were already not present. If so, I think it bought some but I don't know which goes where.
...

Forum: 911 Engine Rebuilding Forum

07-13-2025, 06:44 AM

Replies: 6

What studs in clutch end of case?

Views: 330

Posted By RobFrost

What studs in clutch end of case?

I was going to start reassembly of my 2.2E engine today. First job of the day - getting it on the stand. But of course, the studs which would mount it were removed and time-serted.

I have the...

Forum: 911 Engine Rebuilding Forum

07-10-2025, 03:39 PM

Replies: 11

Is it ok to double up the copper gaskets?

Views: 478

Posted By RobFrost

Thanks Kevin, really reassuring. Sent from...

Thanks Kevin, really reassuring.

Sent from my SM-S918B using Tapatalk

Forum: 911 Engine Rebuilding Forum

07-09-2025, 12:32 AM

Replies: 16

Where should I remove mass from a 1970 con rod?

Views: 742

Posted By RobFrost

All the others are within 2g of each other so I...

All the others are within 2g of each other so I imagine someone has balanced these in the past. Then the black one was added as a later replacement.

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Forum: 911 Engine Rebuilding Forum

07-09-2025, 12:25 AM

Replies: 11

Is it ok to double up the copper gaskets?

Views: 478

Posted By RobFrost

Thanks. Curil T both sides and in-between? I...

Thanks. Curil T both sides and in-between? I didn't realise the shims got Curil T. That's liquid gasket so technically there'll be 5 gaskets in there!

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Forum: 911 Engine Rebuilding Forum

07-08-2025, 03:06 PM

Replies: 16

Where should I remove mass from a 1970 con rod?

Views: 742

Posted By RobFrost

Where should I remove mass from a 1970 con rod?

Rebuilding a 1970 E engine, I noticed one of my con rods is different - it's black. So I presume it's an S con rod with the nitriding.

Anyway, it weighs 10g more than the others, which I guess it...

Forum: 911 Engine Rebuilding Forum

07-08-2025, 12:26 PM

Replies: 11

Is it ok to double up the copper gaskets?

Views: 478

Posted By RobFrost

Thank-you for the advice and for the benefit of...

Thank-you for the advice and for the benefit of your experience. Everything has been measured very carefully.

One cylinder head is 0.25mm shorter and unless I learn a really good reason why not,...

Forum: 911 Engine Rebuilding Forum

07-06-2025, 03:05 AM

Replies: 11

Is it ok to double up the copper gaskets?

Views: 478

Posted By RobFrost

Is it ok to double up the copper gaskets?

I'm using 0.5mm copper gaskets under the cylinders in my 2.2 911. One needs 0.75mm and I have a 0.25mm to hand. Does anyone have experience whether it's OK to double up the copper gaskets? Or do I...

Forum: Off Topic Discussions

06-11-2025, 02:50 PM

Replies: 66

Merged Help Me Name My New Girl

Views: 1,740

Posted By RobFrost

My granddad lived in Wales and had a sheepdog...

My granddad lived in Wales and had a sheepdog named Judy. Every morning he would get up around 5am and put his porridge in the steamer before taking Judy for a 2-3 hour walk along the beach. When he...

Forum: Porsche Marketplace Discussion

05-26-2025, 07:58 AM

Replies: 26

How has this not sold?

Views: 1,735

Posted By RobFrost

Sounds like a lovely engine. I agree that my...

Sounds like a lovely engine. I agree that my engine's probably not worth as much as that engine. But that doesn't undermine my premise that period-correct modifications add more value. If I'm wrong...

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