Madmax Posted September 16, 2006 Share Posted September 16, 2006 Hey all just thought i would post some pics of my engine build, going a bit slow at the moment due to being made unemployed so money is rather scarce. These are some pics of the engine as it stands basically im using a 2litre block out of a mk3gti mated with a 1.8 head which will be ported and polished and a lairy shrick cam and a remap should see me knocking on the door of 165-170bhp in a mk2 golf and N/A aswell. This is the block as it stands at the mo, picked up off ebay for 180quid guy also threw in loads of other goodies aswell including Mk3 PAS pump, Mk3 alternator and engine mounts, clutch and flywheel and a complete 2litre 8v cylinder head which i wont be using due to using a 1.8 head. This also included a engine stand, its had the piston rings replaced big end bearings have been done aswell so i dont need to touch it. So a bargain if i dont say so myself. The only thing i am worried about and im not sure if it is something to be worried about is the tops of the pistons. This is piston No.1 No.2 No.3 No.4 Numbers 1+4 the surfaces are clean and smooth but on 2+3 the surfaces are slightly pitted as shown, is this a problem? Link to comment Share on other sites More sharing options...
Madmax Posted September 17, 2006 Author Share Posted September 17, 2006 Anybody got any ideas? Need to know if its gona prove a problem before i start bolting it all together. Link to comment Share on other sites More sharing options...
Devboy Posted September 17, 2006 Share Posted September 17, 2006 personaly, I wouldn't expect it to be a problem. but I'm not that good with this stuff. Link to comment Share on other sites More sharing options...
awattam Posted September 18, 2006 Share Posted September 18, 2006 I would say that so long as there aren't and really deep pits or other damage then it shouldn't be a problem. I'd smooth off any little bits which stick up so that they don't become hot spots and cause detonation. Link to comment Share on other sites More sharing options...
Stu Posted September 18, 2006 Share Posted September 18, 2006 The pitting in those pistons is the result of detonation.. nasty Link to comment Share on other sites More sharing options...
Madmax Posted September 18, 2006 Author Share Posted September 18, 2006 So i take it i will be needing to replace those pistons then? Link to comment Share on other sites More sharing options...
Andy_GTi Posted September 20, 2006 Share Posted September 20, 2006 but the pitting isn't really going to affect the performance, as it's not severe. give then a light clean with some wet and dry new rings, and solve the detination prob.......... if you replace the pistons you have to measure the bores/ run in and i would expect it'd make the slightest differance. oh for a guide my 250cc gearbox kart has some detination on it i just blend it out and new rings, runs a treat Link to comment Share on other sites More sharing options...
Andy_GTi Posted September 20, 2006 Share Posted September 20, 2006 did you paint the block ? Link to comment Share on other sites More sharing options...
Madmax Posted September 20, 2006 Author Share Posted September 20, 2006 Nah i didnt paint it, was like it when i got it. Its had new rings at some pont and the pitting from detenation must of been when it was a full 2litre. When i build it its gettin a new head anyway. Link to comment Share on other sites More sharing options...
Andy_GTi Posted September 23, 2006 Share Posted September 23, 2006 what / where is the head coming from ? i'm trying to find info on fitting a st170 head to a 2.0 bottom end Link to comment Share on other sites More sharing options...
Madmax Posted September 23, 2006 Author Share Posted September 23, 2006 Sorry boss but this is a 2litre 8valve bottom end of a mk3gti and the head i will be using is a 1.8 8valve head off a mk2 gti both cars Vw golf Link to comment Share on other sites More sharing options...
Andy_GTi Posted September 23, 2006 Share Posted September 23, 2006 LOL oh yeah doh...... i'll go sit in the corner ! Link to comment Share on other sites More sharing options...
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