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Author Subject: Piston ring gaps
S8-Tom

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Location: Chichester

Registered: 02 Feb 2018

Posts: 344

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Post #1
I've been measuring my crank and piston rings today to make sure everything's ready to be put back together when I get the head back.

I've bought Goetze rings (part 08-306800-00) for a Vauxhall C20LET engine as these have been widely used by others for the J4RS engine.

I'm getting 0.5mm on the top ring and 0.45 on the second/middle ring. This is pushing the upper range of what Haynes suggests and I think I've read on here that 0.3-0.35 is typical?

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Posted 30th Oct 2020 at 15:31
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

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Post #2
your block is probably a bit worn out! quite typical of these blocks.

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Bring on the Trumpets.

Posted 30th Oct 2020 at 19:11
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S8-Tom

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Location: Chichester

Registered: 02 Feb 2018

Posts: 344

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Post #3
welshpug! wrote:
your block is probably a bit worn out! quite typical of these blocks.


I think that's the reality of it. I'm sure this car hates me. The block in question has 80K on it and was measured with a dial bore guage, appeared to be good but clearly wasn't thorough enough with the measurements! Shame, it's been decked and honed already Thumbs down

Looks like I'm back to the original block and an overbore then. FFS Wink

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Posted 30th Oct 2020 at 20:02
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prism7guy

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Location: DoncastAAAAARGH

Registered: 13 Jan 2008

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Post #4
What pistons will you be going for with the oversize bore?

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Goldie the track car.
Posted 30th Oct 2020 at 23:12
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S8-Tom

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Location: Chichester

Registered: 02 Feb 2018

Posts: 344

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Post #5
prism7guy wrote:
What pistons will you be going for with the oversize bore?


Found these ones from Mahle. The 06xxxx are the corresponding Peugeot part number. The first oversize is NLA from Peugeot but in any case, they're twice the price of the Mahle items.

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1343Z4 coolant hose o-rings for sale
198131 injector o-rings for sale
Posted 31st Oct 2020 at 08:25
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prism7guy

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Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

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Post #6
Cheers for that, may have to get a set if my suspicions are true on one of my engines.
I thought they'd be more expensive than that to be honest.

________________________________________

Goldie the track car.
Posted 1st Nov 2020 at 20:14
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S8-Tom

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Location: Chichester

Registered: 02 Feb 2018

Posts: 344

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Post #7
prism7guy wrote:
Cheers for that, may have to get a set if my suspicions are true on one of my engines.
I thought they'd be more expensive than that to be honest.


Even better price from here!

I've been talking to them and they've confirmed they can be ordered and that they're suitable for the XU10J4RS

I've ordered 4 @ £275.92 shipped to the UK.

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198131 injector o-rings for sale
Posted 2nd Nov 2020 at 08:48
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prism7guy

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Location: DoncastAAAAARGH

Registered: 13 Jan 2008

Posts: 4,640

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Post #8
Cheers for sharing that info Thumbs up

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Goldie the track car.
Posted 2nd Nov 2020 at 20:34
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S8-Tom

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Location: Chichester

Registered: 02 Feb 2018

Posts: 344

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Post #9
Pistons arrive this morning. Less than a week from ordering and tracked right to my front door within a 1 hr time slot!







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198131 injector o-rings for sale
Posted 9th Nov 2020 at 11:11
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

Status: Offline
Post #10
ideal time to make those cutours +1.0mm Big grin

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 9th Nov 2020 at 16:56
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S8-Tom

Regular

Location: Chichester

Registered: 02 Feb 2018

Posts: 344

Status: Offline
Post #11
welshpug! wrote:
ideal time to make those cutours +1.0mm Big grin


Impact on compression with larger bores AND valve cutouts? Head will have a small amount taken off (currently at 136.91) and block decked. There's also the argument of mapping or not with cams Dunno

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1343Z4 coolant hose o-rings for sale
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Posted 9th Nov 2020 at 19:02
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