Heads Off Due To Pressurised Coolant

Big lumps of metals and spanners. Including servicing and fluids.

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maxstu
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

And to what standard do l clean this mating ring area to the sleeves? When l pulled the sleeves out there was loads of black mastic around the base and covering the sealing ring. Is it needed?
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937carrera
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Re: Heads Off Due To Pressurised Coolant

Post by 937carrera »

No mastic unless you trained at that place in Essex :roll:

Cleanliness is next to godliness in engine building. keep cleaning, no scratching though. :wink:
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maxstu
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Re: Heads Off Due To Pressurised Coolant

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937carrera wrote:
30 Jul 2020, 18:38
No mastic unless you trained at that place in Essex :roll:

Cleanliness is next to godliness in engine building. keep cleaning, no scratching though. :wink:
Cheers David :ok
But l need a bit of guidance here. Should l clean the ring surface in casing with fine wet and dry with a bit of oil to get it shiny again? Or just a quick wipe with a clean oily rag? Besides, how clean is clean? Have you seen our house, with four dogs roaming the four quarters. Maxine and l think its clean. On the other hand the kids throw up when they (rarely) visit. Nah, its really not that bad. :oops:
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937carrera
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Re: Heads Off Due To Pressurised Coolant

Post by 937carrera »

I'm on the page of cleaning only, no abrasives which could destroy a seal.

Diesel and petrol are good solvents for removal of stuff, brake cleaner to remove final residues.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
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maxstu
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

937carrera wrote:
30 Jul 2020, 19:28
I'm on the page of cleaning only, no abrasives which could destroy a seal.

Diesel and petrol are good solvents for removal of stuff, brake cleaner to remove final residues.

Okay and thanks... :ok
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Re: Heads Off Due To Pressurised Coolant

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Cobra88 wrote:
28 Jul 2020, 20:18
The metal bit looks like part of a thermostat to me
Do you know what, Rick? I think you are right. Same type of material and curve is correct.
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Re: Heads Off Due To Pressurised Coolant

Post by silverbullet »

maxstu wrote:
30 Jul 2020, 18:23
And to what standard do l clean this mating ring area to the sleeves? When l pulled the sleeves out there was loads of black mastic around the base and covering the sealing ring. Is it needed?
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Wire wool, but don't lose any into the engine. Always a challenge if you aren't going to split the case.
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maxstu
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Re: Heads Off Due To Pressurised Coolant

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silverbullet wrote:
31 Jul 2020, 16:52
maxstu wrote:
30 Jul 2020, 18:23
And to what standard do l clean this mating ring area to the sleeves? When l pulled the sleeves out there was loads of black mastic around the base and covering the sealing ring. Is it needed?
Image

Wire wool, but don't lose any into the engine. Always a challenge if you aren't going to split the case.

Thanks very much. Engine is on (best buy ever) a rotating engine stand. I can clean with engine at correct angle so debris falls away from internals.
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Re: Heads Off Due To Pressurised Coolant

Post by ajsimmo »

Or scotchbrite pads. Less aggressive than wire wool, but with thinners or brake cleaner gets most bits nice and clean.

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maxstu
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

ajsimmo wrote:
01 Aug 2020, 15:53
Or scotchbrite pads. Less aggressive than wire wool, but with thinners or brake cleaner gets most bits nice and clean.

Sent from my ONEPLUS A3003 using Tapatalk
I have both aplenty.
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Stuart
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

Anything standing out to you guys? Ive cleaned a little with wire wool and brake fluid. Nothing heavy. But not end result.
There's a small bit of black rubbery mastic style material over one ring. Cant recall seeing it when l lifted heads though. Perhaps l cleaned away the crucial evidence. Can it leak from other side of ring? Will heat up and lever of with non metallic utensil.
BTW. Why does one head have 3 stamped and other 4? I thought heads were l identical?

Regards
Stuart


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Last edited by maxstu on 02 Aug 2020, 17:36, edited 1 time in total.
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937carrera
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Re: Heads Off Due To Pressurised Coolant

Post by 937carrera »

I think the numbers you are seeing are casting numbers, the heads are the same left and right.

Diesel does a better job of softening carbon deposits than brake cleaner and I have always managed to get the sealing ring off with a small screwdriver.
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
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maxstu
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

Righto! Many thanks. But one head is deffo stamp 4 and t'other marked 3, in the casting near the rocker arms.
Regards
Stuart
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

Just thought of something l recall reading some while back. Mounting points for PAS using DG heads? No holes?
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Re: Heads Off Due To Pressurised Coolant

Post by maxstu »

Just thought of something l recall reading some while back. Mounting points for PAS using DG heads? No holes?
[/quote]

Anyone care to comment?
Also lm cleaning where lower sleeve seal mates with main cases. Ive found a small crack. Is this an issue? About 4mm long. Perhaps that why black silicone (l mean same stuff used on heads) was laid around base of all sleeves.
Your comments please...

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