How to check a 3.0 by bore size.

[Lowlifedubber 9]

Hi lads,im new to posting on here but ive been a member for some time.

Ive read just about every thread on here in preparation for the engine conversion on my MK3 Golf.

Well the time has come and ive finally bought an engine.....2 in fact.

A bit of pot luck really but i have bought 2 engines off a guy that bought a job lot of stuff in an auction from a VW enthusiast in Lincolnshire.

One is just a standard AAA OBD2 block and the other is an overbored 3.0 with Wossner low comp pistons.

Now the guy swears blind that it is a 3.0 and i have no reason to disbelieve him,either way i shall be buying them as i got them at a good price.

Im picking them up on friday and i will get to work stripping them down to the last ut and bolt and putting an expensive order in to VW.

However id like to check for myself if the 3.0 is actually what he says it is.Sooo what internal bore measurement am i looking at to clarify it is a 3.0?Im sure the pistons will have markings on them but id like to check for bore wear and size before i go to the expense of getting the block magnafluxed and skimmed.

Is there a chart or a guide anywhere so i can check?Im a mechanical engineer so have all the tools needed for measurements etc.

Thanks lads.

Gary

[cabrioman 6]

the bore size should be 83mm mate that as close to 3.0 as you can get 2994 CC i think ??!!

[Lowlifedubber 9]

You superstar thanks Tony,im hoping finding new rings and bearings for these pistons wont be too much of a pig to source.

Looking forward to tearing them down though!It will be my favourite part of the build

Thanks again Tony

[Daverse 175]

I was watching that auction, and missed it by a minute! damn you!!!

[cabrioman 6]

should be easy enough to find them id go to Wossner for the rings so they match the pistons, as for bearings can get race speck ones or the correct sized ones from VW

[Lowlifedubber 9]

PMSL sorry Dave,i see your in Lincoln too.I bought both of them that he had for sale.Apparently from a vw nut from Holbeach,spoke to him on the phone today and he mentioned the guy mentioning pistons by wassup,so im guessing that could be wossner lol

I was bidding on this in Donny though, http://www.ebay.co.uk/itm/170785130217?_trksid=p5197.c0.m619#ht_500wt_1069

Spoke to him via email and he seems very clued up and has no end of other parts.I pretty damn sure he will be on here lol

[Lowlifedubber 9]

should be easy enough to find them id go to Wossner for the rings so they match the pistons' date=' as for bearings can get race speck ones or the correct sized ones from VW

[/quote']

Depending what rods it has in there i will have to get the bearings spec'd up.It will be getting a supercharger bolted on it so i will get uprated where i can.

Will be trying to find a good source for arp bolts and im guessing for chains,guides and tensioners im better off going direct to vw?

[cabrioman 6]

can do mate or get them from ECP as they normally use VW bits just grind the numbers off ....

[Lowlifedubber 9]

Really!Bugger me i use them all the time using Golfgtiforums 25% off discount code and never knew that!

Do you know if there are any standalone 2.8vr6 engine specific workshop manuals out here?Im not a fan of Haynes and cant seem to find a Bentley manual anywhere!

[Daverse 175]

Hmm I guess I could forgive you.. I think I'll just bore out my block instead of buying a used one, just seemed too good to miss! Let us know how the build goes, If you need any help in the conversion give us a shout, im only down the road!

[Lowlifedubber 9]

Thanks Dave i appreciate that.Im just trying to figure out how to get the engines from the van to my garage without an engine hoist!Ive got an engine stand but no way of getting it up there yet ha ha.

My hoist packed up a few months ago and havnt got the room to buy and store another at the minute.

Same goes for you btw,i have most tools and im only on Wentworth way

[Daverse 175]

Thanks Dave i appreciate that.Im just trying to figure out how to get the engines from the van to my garage without an engine hoist!Ive got an engine stand but no way of getting it up there yet ha ha.

My hoist packed up a few months ago and havnt got the room to buy and store another at the minute.

Same goes for you btw' date='i have most tools and im only on Wentworth way

[/quote']

Well, if you promise not to break it , if you like you could borrow mine, although I might sound like an anal nutbag, but I need it back the same day (I can help with the lifting) becuase it isnt strictly mine. Although you may have to pick it up im afraid as I dont have a van anymore. Anyway its here if you so desire

[Lowlifedubber 9]

Thanks Dave that would be very handy.Im set for getting it in and out of the van ive decided my tow pole and a couple of chains will get them in and out of the van but when it comes to putting one of them up on the stand a hoist would be very handy!It wouldnt be until next week though if you still have it.If not i might still rope you into helping me an another lift it up there while the missus puts the bolts in the block.

Id fit an electric hoist in my garage roof but all the ceiling is plasterboarded in so cant find a decent joist to stick one on

[Daverse 175]

Yeah I'll have it then, we could use it for getting it out of the van and for placing on the stand, those blocks are bloody heavy to lift!

Give us a bell on 07931728566 if you like, as I'm not sure when I'll be on the computer next. I live in woodhall spa, not sure if thats too far for you?

[UnitedMotorsport 55]

83mm bore on stock stroke gives 2931.5cc - still 2.9

83.5mm bore on stock stroke gives 2966.9 - barely 3 litre

84mm bore on stock stroke gives 3002.5 - a true 3 litre.

[cabrioman 6]

ah there we go knew someone would have the specs .... lol i was close .... ish lol

[Lowlifedubber 9]

Yeah I'll have it then' date=' we could use it for getting it out of the van and for placing on the stand, those blocks are bloody heavy to lift!

Give us a bell on 07931728566 if you like, as I'm not sure when I'll be on the computer next. I live in woodhall spa, not sure if thats too far for you?

[/quote']

Thanks Dave,im bang in Lincoln so not too far from you at all.My number is 07850 436867(so you know whos ringing

Thanks again mate

Gary

[Lowlifedubber 9]

83mm bore on stock stroke gives 2931.5cc - still 2.9

83.5mm bore on stock stroke gives 2966.9 - barely 3 litre

84mm bore on stock stroke gives 3002.5 - a true 3 litre.

Outstanding thanks for that,its just what i was after.Just liked you on Facebook,i can see you guys are going to be very handy for parts!

[matty.vrt 120]

i would be happy if it had 83mm pistons in tho as allot of people class that as 3litre correct or not.

[Lowlifedubber 9]

i would be happy if it had 83mm pistons in tho as allot of people class that as 3litre correct or not.

Yeah i did consider that' date='im not one for skimping on cost at all but as i can see the engine build is going to cost me upwards of £2k having oversized pistons already was a small relief.If it comes too i will certainly buy some.But im all for info 1st buy later so im just trying to sponge up all the knowledge i can.

Current umms and arrrs are

Big valve head on f.i engine.Is it worth it?

If i get the head skimmed to within an inch of its life like this

[img']http://image.turbomagazine.com/f/24839603%2Bw750%2Bst0/turp_0103_10_z%2Bvolkswagen_golf_vr6_turbo%2Bvr6_head.jpg

am i wasting my time as eventually i will be fitting a spacer gasket when i go f.i?

Cams,i have reason to believe i have after market cams in the other engine.Is there a way of measuring the lobes to get an understanding of whether they are standard or not?

How can i work out the stroke on my unidentified conrods?

My crankshaft looks like the oil holes where the shells go(conrods)have been elongated,is this to help with oil flow as ive not seen it on other cranks?

Why couldnt i have a cheaper hobby like collecting old batteries or something?lol

[Lukey. 381]

it wouldnt give you such a buzz, unless you licked the terminals lol

[FishWick 21]

83mm Wossners have "06306" stamped into the crown, which is a way to indentify them easily.

Big valve head and cams definitely worth it. I found 50hp from +1mm bigger valves and Schimmel 263 cams, from the same boost pressure. The more air you can cram into the cylinders, the better :-)

[Lowlifedubber 9]

83mm Wossners have "06306" stamped into the crown' date=' which is a way to indentify them easily.

Big valve head and cams definitely worth it. I found 50hp from +1mm bigger valves and Schimmel 263 cams, from the same boost pressure. The more air you can cram into the cylinders, the better :-)

[/quote']

Excellent,thanks for that Mr Wick.

Ive worked out the bore and pistons are specced up for a 3.0,they are Mahle pistons but id like to use new rings,tried getting in touch with mahle but no reply yet

As for the big valve head,is there anywhere you can recommend for the valves/seats etc and a company for doing the job?What am i looking at,around £500?

Thanks for your help

[cabrioman 6]

if you go to schimmel performance they do a upgrade head set its about £500 plus shipping and fitting ..... http://www.spturbo.com/onlinestore/index.php/volkswagen/mk3-94-98/vr6/engine/cylinder-head-valvetrain/stainless-high-flow-intake-valve-39mm-47.html

[Lowlifedubber 9]

Nice one Tony,would you suggest getting 1.0 or 2.0mm oversize?Bear in mind i will be N/A for 3-6 months to bed the fresh engine in,then go f/i with a supercharger.