Sump 'crush' washers - a lesson learned

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Welly
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Sump 'crush' washers - a lesson learned

Post by Welly » Thu May 03, 2018 12:58 pm

Did an oil change on the Twingo on Sunday, remembered I renewed the sump washer last time I thought I'd be safe to reuse it a second time....OH NO YOU WON'T said the washer :(

The Renner sump washer is an aluminium 16mm and just kinda squashes between the two surfaces as you'd expect only the 'second' application turned it into something resembling a satellite dish and many drips of oil followed. Ordered one from Opie Oils which came within 2 days.

Last night after work I drained the oil AGAIN and replaced the washer, refilled the oil and ran the engine, all looked ok and I didn't want to 'murder' the thing up tight but this morning there was the slightest hint of seepage so I might give it a tiny bit more torque later and that should be that.

The lesson in this case being if its an aluminium washer then throw away and renew everytime.

I don't know why the Citroen and Volvo are different but I definitely didn't replace the washers on either of them before and have had no leaks at all.
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Re: Sump 'crush' washers - a lesson learned

Post by steve_earwig » Thu May 03, 2018 4:19 pm

The yoyo has an ally sump drain plug thingy washer too.

Seems like complete wank to me, so for the last service I was looking for a size recommendation to replace it with a proppa coppa one. Whilst researching I chanced upon a youtoob recording of a chap in the colonies replacing his with copper, glancing down the comments my eyes fell upon a comment from a Toyota mechanic who said you don't know what the torque should be so there's a chance you'll damage the sump and, anyway, these things are pennies, why are you bothering?

So anyway yes, if it's copper you can use it again, if it's ally it goes in the bin.
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Re: Sump 'crush' washers - a lesson learned

Post by PeterN » Fri May 04, 2018 10:29 am

I have a stock of copper ones in both sizes, bought them from ebay for not much money some years ago but have used very few, if you tighten them sensibly you can use them several times. Don't know about torque, I just tighten them until they feel about right.

Peter

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Welly
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Re: Sump 'crush' washers - a lesson learned

Post by Welly » Fri May 04, 2018 11:30 am

Me too, I just do them up by 'feel'.
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Re: Sump 'crush' washers - a lesson learned

Post by piglet » Fri May 04, 2018 1:59 pm

PeterN wrote:
Fri May 04, 2018 10:29 am
I have a stock of copper ones in both sizes, bought them from ebay for not much money some years ago but have used very few, if you tighten them sensibly you can use them several times. Don't know about torque, I just tighten them until they feel about right.

Peter
Mee too

I changed a leaking copper one once by sticking my thumb over the hole and changing it with the other hand. Lost surprisingly little.
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Re: Sump 'crush' washers - a lesson learned

Post by PeterN » Sat May 05, 2018 10:41 am

If you cant stop one leaking, unscrew it a couple of turns and wrap some PTFE tape round it, worked for me. My first 406 had the thread in the sump stripped, again, wrapped PTFE tape round the thread, did that every oil change for about 80k miles, no problems.

Peter

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Re: Sump 'crush' washers - a lesson learned

Post by Bailes1992 » Wed May 09, 2018 4:18 pm

I often heat up copper washers and let them cool before reusing them. Only if I need to however, I have a box of copper washers in the garage which always comes in handy.
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Re: Sump 'crush' washers - a lesson learned

Post by jasper5 » Fri Jun 01, 2018 6:52 pm

The latest sump washers have a rubber ring inside them for sealing.

I always smear a little instant gasket onto the washer, never get leaks.

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Re: Sump 'crush' washers - a lesson learned

Post by Welly » Mon Jun 04, 2018 9:11 am

jasper5 wrote:
Fri Jun 01, 2018 6:52 pm
The latest sump washers have a rubber ring inside them for sealing.

I always smear a little instant gasket onto the washer, never get leaks.
I have seen these, apparently a genuine Renner sump washer does have a rubber seal. Will get one next time.

Temporarily and without wanting to murder the thing up I smeared some 300degC mastic around it which has held up lovely.
Cars in my care:

2005 Volvo S40 T5 a bit pampered
2010 Citroen C4 1.6 HDi turbo de' explosions
2010 Renner Twingo refreshingly simple

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