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1.8 vvc timing 
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Ready for SVA

Joined: Wed Aug 11, 2010 9:27 am
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Location: Sheffield
GTM: Libra
Post Re: 1.8 vvc timing
If you have the time and space to store the car and bits while you do it, if it were me i'd strip off the manifolds etc. and take the head off myself to see what the problem is and what condition the block and head faces are in. Then you can make an informed decision as to what you need to proceed & the only thing you've spent is time.
Do you have metal or plastic dowels? (need metal as plassy ones can contribute to HGFs)
Is the block face ok, not warped or damaged?
What is the status of the cylinder liners, measure how much they protrude from the block face. This will determine which type gasket you should be using.
Is the head face pitted or warped?

I DL this and found it useful http://www.timguydesign.f2s.com/pics/MG ... cement.pdf

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2000 GTM Libra 1.8VVC 145BHP


Wed Jul 24, 2019 11:25 am
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Joined: Thu Nov 22, 2007 10:31 am
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Post Re: 1.8 vvc timing
Took the head off and it was OK, no warping or pitting. The liners weren't level and three of them were level with the block so the MLS wouldn't have worked anyway.

Unfortunately we found that the engine block was in a sorry state. Heavily corroded. Water is leaking into the sump from somewhere lower than the head gasket. When a small amount of water was poured around the liners it would come out the sump plug so it's a significant leak. Not sure at this point but the liners could be compromised, (moved or corroded through), or possibly even an internal crack somewhere. The engine stood for years without any coolant in it, clearly there wasn't enough corrosion inhibitor remaining to prevent it.

We've taken the engine and box out completely and I will buy either a new block or a complete new engine as I don't have the time or expertise to refurbish it myself.

We were so close haha!


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Fri Aug 16, 2019 8:15 am
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Ready for SVA

Joined: Wed Aug 11, 2010 9:27 am
Posts: 431
Location: Sheffield
GTM: Libra
Post Re: 1.8 vvc timing
I'd guess it's the liner's bottom sealant to the block that's the problem. Unless the block itself is cracked -tho i wouldn't think that would be a fast leak.

(Y'know the triangular holes are oil ways so if you pour water in them it will go into the sump - yeah?)

If the block is ok you can re-seat and reseal the liners, not too hard as long as you keep all parts in same place/orientation when refitting.

Those liners do look quite rusty, here's what mine looked like;
Attachment:
Block 1.JPG
Block 1.JPG [ 226.09 KiB | Viewed 100 times ]


(Tony - Also i've re-uploaded my cooling system diagram (earlier in the thread) as I got the PRT to radiator section wrong.)

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2000 GTM Libra 1.8VVC 145BHP


Fri Aug 16, 2019 12:19 pm
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Part built GTM

Joined: Thu Nov 22, 2007 10:31 am
Posts: 112
Post Re: 1.8 vvc timing
Yes I know :) I poured the water around the cylinder liners (where your blue / orange, coolant + rust mixture is).

I'm tempted to have a go at re-sealing if it's straight forward and not too costly. I removed the sump and oil ladder, I can see the bottom of the pistons and liners. Is it possible to push the liners up, seal them from the bottom using Hylomar and then push them back down and clamp them from the top in order to seal them, or is it easier to remove the crank, pistons, liners and re-fit. If the liners rotate slightly during any kind of refit could that cause issues?

Don't really want to replace the liners, pistons etc. it's cheaper to buy a new engine + box + ancillaries on eBay... but of course a second hand engine could have issues of it's own.


Fri Aug 16, 2019 4:14 pm
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Ready for SVA

Joined: Wed Aug 11, 2010 9:27 am
Posts: 431
Location: Sheffield
GTM: Libra
Post Re: 1.8 vvc timing
Now you have sump off can you experiment to tell where the leak is exactly?

No experience with stripping blocks, only what i've read but I think you need to pull the liners out altogether to clean off the old sealer, I read you can leave the pistons in the liners to save trouble of reinserting pistons/mixing up orientation position etc. (dunno how this is done)

You can also get shims to lift the liners up and/or make them all same height.

Assuming the bits you have are basically sound, I guess it would only cost price of sealant (blue hylomar?) and maybe shims in terms of £££. Maybe worth getting a quote from a K specialist or two to see what it would cost to have em done if you present em with just the block?

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2000 GTM Libra 1.8VVC 145BHP


Fri Aug 16, 2019 4:57 pm
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