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Info wanted on 1800 SOHC engine 
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Joined: Tue May 10, 2011 2:23 am
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Location: Melb.
Car(s): '72 Sport Bellett (imported 180912), M/B AMG A35, i30, had Belletts in past, 2 sed, 3 GT's.
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Peter, all the pistons on ebay seem to be dished type, except this one which is a flat top, so might do the job. But i am unsure if this fits the SOHC engines by the description. Although "series 1 -4" would seem right.

"110(1.8 Liter) GMC LUV Engine Piston Set 1972-1975" Brand New!
For 1972-1975 1 Thru 4 Series
2 Sizes available STD, 020 Over

http://www.ebay.com.au/itm/110718451910?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#shId



LATER UPDATED:-the pistons shown in the picture: says 3.3871" bore which is 86.03mm. Too big for a 84mm bore.

glenn

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'72 PR60 Sport


Tue Apr 17, 2012 3:48 am
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decompressed just beggs forced induction 8-) It's the only fix ;)


Tue Apr 17, 2012 4:04 am
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Joined: Tue May 10, 2011 2:23 am
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Location: Melb.
Car(s): '72 Sport Bellett (imported 180912), M/B AMG A35, i30, had Belletts in past, 2 sed, 3 GT's.
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yes i thought of that !!

BUT getting on Vic Club reg permit might be a problem !

glenn

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Tue Apr 17, 2012 5:02 am
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Car(s): Gt Bellett, Rover 90, Rover 75 ,327 hk Monaro, 307 ht Ute, Mazda 6 wagon.
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I don't think 84mm will be a problem as the isuzu blocks are pretty thick I now 1800 twin cams go out to 2 litre size ok and the 1800 single cam is the same block so should be ok and just think that extra swept volume will only help in getting the comp up oh and on the point of blowing the engine and club rego I don't think you will have a problem look at all the mg's out there and there on read plates I know as I have dyno tuned a heap of them regards Peter.


Tue Apr 17, 2012 11:41 am
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Joined: Tue May 10, 2011 2:23 am
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Location: Melb.
Car(s): '72 Sport Bellett (imported 180912), M/B AMG A35, i30, had Belletts in past, 2 sed, 3 GT's.
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86.03 equates to ~1906cc from the 84 x 82 SOHC 1800 engine.

The above pistons are flat top on ebay but no rings with them. Is it feasible to get rings for that size

Is it safe in all cases to punch them this far or is sonic testing first needed.

glenn

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'72 PR60 Sport


Tue Apr 17, 2012 10:31 pm
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Car(s): '72 Sport Bellett (imported 180912), M/B AMG A35, i30, had Belletts in past, 2 sed, 3 GT's.
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I found these pistons, can anybody comment on them please?

They are supposed to be for the SOHC 1800cc engine, Series 1 - 4 Chevvy LUV in USA.

They are domed on top. >> updated:- Must be my eyes, vendor says they are flat tops.

Not 'shiny' looking either like others on eBay.


Attachments:
photo 1.JPG
photo 1.JPG [ 92.19 KiB | Viewed 13248 times ]

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Last edited by Glenn on Wed Apr 18, 2012 4:28 am, edited 2 times in total.

Wed Apr 18, 2012 12:16 am
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They are 84mm +20 thou'


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Wed Apr 18, 2012 12:18 am
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I now have this info on the pistons, (appears to be +0.5mm or 20thou over)

P405 X .50mm or .020 in
Standard bore: 3.3071 or 84.0mm
Compression distance: 1.445
Ring pack: 2@2.0 1@4.0
Head type: Flat top
Pin diameter: .8664
For 1972-75 engines (1thru 4 series)



can anybody cross ref this to a SOHC engine or Gemini/Rodeo to see if Ok for SOHC 1800 ?

Please.

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Wed Apr 18, 2012 10:21 pm
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I took a plunge here.

Bought Luv series '72 - 75, flat top piston set. +30thou. OK, not 'right' pistons, but better than dished ones.

Rings and full gasket set. Hopefully right one see below, appreciate any feedback !

Just need a car to go with them !

glenn


Attachments:
Gasket set LUV.jpg
Gasket set LUV.jpg [ 40.1 KiB | Viewed 13213 times ]
Piston set 190412.jpg
Piston set 190412.jpg [ 18.32 KiB | Viewed 13213 times ]

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Thu Apr 19, 2012 10:47 pm
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Hi Glen, as promised some pics of pistons that Dutch Dick sent me, when I was looking around for them myself.
Hepolite
Attachment:
Hepolite.jpg
Hepolite.jpg [ 177.53 KiB | Viewed 13198 times ]

Repco
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repco.jpg
repco.jpg [ 322.68 KiB | Viewed 13198 times ]

Toto
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Toto.jpg
Toto.jpg [ 258.9 KiB | Viewed 13198 times ]

These would make nice Christmas cards as well :)


Fri Apr 20, 2012 10:44 am
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Mark, are they 84mm pistons? I guess not if for Rollie.

glenn

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Fri Apr 20, 2012 11:36 pm
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Car(s): Isuzu Bellett 1600 Sport SOHC, Honda City 2006, Honda CRV 2010, Vespa P150
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Hi Glenn,
The pic's Pombellett shows us are pistons for a 1600 (82 mm pistons) indeed, I also do have the 84 mm pistons. They look just the same with he little step on top of the piston too. This offcourse will give a better compr ratio.
The original sohc pistons had the cam on the piston not only for higher compression, but also for the flow in the chamber.

I'd say; now it is getting time to go out and buy an 1800 sohc car. With a bit of luck it has a good engine with no work at all !

groejes Dick


Sun Apr 22, 2012 7:46 pm
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Thanks for info, Dick.
I was going to buy a car that had an engine in 'down' condition hence the parts but its now been withdrawn from sale. Of course, i would prefer a car with a good engine though, but need to find one.

glenn

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Sun Apr 22, 2012 10:04 pm
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