camshaft

From the humble 1256 to meaty V8`s, swaps, rebuilds, tunning, etc.

Moderator: Moderators

Postby ross.cheeks » 14 Sep 2009, 11:48

the blobs on it is drops of water where i washed off all the stuff

Image
Image
Image
Image
Image
Image
User avatar
ross.cheeks
Advanced Motorist
Advanced Motorist
 
Posts: 490
Joined: 27 Jan 2007, 20:58
Location: aberdare drives:'77 chevette hatch

Postby pbottomley » 14 Sep 2009, 21:20

Perfect fella.... assume its sold !!!! :D :D :D :D :D :D

right let me see if i can get a mate of mine in Barry to collect it on his way to the Viva national this weekend at Haynes museum......


PM me your contact details and I will call you and sort soem stuff out.... PS do you also have a sump spare?
pbottomley
 

Postby pbottomley » 20 Sep 2009, 18:51

TOP MARKS to Ross, I have a nice oily 1256 block in my boot..... cheers fella!!! :D :D :D :D :D
pbottomley
 

Postby Shuvit-pinto » 21 Sep 2009, 08:56

Hi Paul.

You wanted a Sump.

You can have one, will post for £3.00 to cover P+P

Mark
User avatar
Shuvit-pinto
Forum Parts Squirrel
Forum Parts Squirrel
 
Posts: 1414
Joined: 01 Feb 2005, 00:58

Postby ross.cheeks » 21 Sep 2009, 09:55

pbottomley wrote:TOP MARKS to Ross, I have a nice oily 1256 block in my boot..... cheers fella!!! :D :D :D :D :D


tidy, any other bits and bobs you mite need just gimmie a shout, therespretty much the whole engine lying there in bits
User avatar
ross.cheeks
Advanced Motorist
Advanced Motorist
 
Posts: 490
Joined: 27 Jan 2007, 20:58
Location: aberdare drives:'77 chevette hatch

Postby pbottomley » 21 Sep 2009, 17:44

Shuvit-pinto wrote:Hi Paul.

You wanted a Sump.

You can have one, will post for £3.00 to cover P+P

Mark


A nice sump went with the engine, but thanks for thinking... For some reason I have been one sump short for engines for last year, each time one comes in to build I nick the sump off it to finish off another LOL

I think I have just about all I need to keep me going over winter apart from sump gaskets....
pbottomley
 

Postby Shuvit-pinto » 21 Sep 2009, 19:38

Hi Paul.

You are not clear if you want it or not. :?: :?: :?:

Mark
User avatar
Shuvit-pinto
Forum Parts Squirrel
Forum Parts Squirrel
 
Posts: 1414
Joined: 01 Feb 2005, 00:58

Postby ross.cheeks » 21 Sep 2009, 19:41

Shuvit-pinto wrote:Hi Paul.

You are not clear if you want it or not. :?: :?: :?:

Mark


i sorted him out with a sump :wink:
User avatar
ross.cheeks
Advanced Motorist
Advanced Motorist
 
Posts: 490
Joined: 27 Jan 2007, 20:58
Location: aberdare drives:'77 chevette hatch

Postby pbottomley » 21 Sep 2009, 19:49

Sorry, at the minute I have the one sump I need, however I may well need one soon so don't throw it away :D
pbottomley
 

Postby Shuvit-pinto » 21 Sep 2009, 20:01

Thats OK, getting used to being second LOL. Always miss out on bargain buys and loose out on selling. same with my aircraft business too. Sigh.

Not throwing anything away. Have piles of bits and stuff for Chevettes mostly Hatchbacks. Lots of 1256 parts too piles of stuff.

Regards
mark
User avatar
Shuvit-pinto
Forum Parts Squirrel
Forum Parts Squirrel
 
Posts: 1414
Joined: 01 Feb 2005, 00:58

Postby pbottomley » 21 Sep 2009, 21:41

I shall keep you in mind...

I do have a urgent need for a fully working and available 1256 engine for a late HC for a lady in brum who has lost her daily drive :cry: I dont have a spare 1256 engine for her.
pbottomley
 

Postby pbottomley » 02 Oct 2009, 18:38

Ross the replacement block has been rebored, and new cam bearings fitted. Its also been washed within an inch of its life, so I had better get it painted up this weekend before it gets rusty!

<a href="http://www.postimage.org/image.php?v=Ts1wLkji" target="_blank"><img src="http://www.postimage.org/Ts1wLkji.jpg" border="0" alt="Free image hosting powered by PostImage.org"></a>


Here is the block, not just how much the blocked is bored at 0.060", not much meat left between the bores!

I also had the pistons checked over, and again cleaned within an inch of their lives. Its a shame they were on the con rods, and or I cannot find a new set of +0.060" pistons, as I can only do limited balancing.

<a href="http://www.postimage.org/image.php?v=Ts1wLzh9" target="_blank"><img src="http://www.postimage.org/Ts1wLzh9.jpg" border="0" alt="Free image hosting powered by PostImage.org"></a>

The best part is the flywheel, I couldn't separate it from the crank as I didn't have a 3/16th allen key (will get one) the nice man at the workshop did it for me. and side by side one can see the massive amount of lightening its had.

<a href="http://www.postimage.org/image.php?v=Ts1wM7c9" target="_blank"><img src="http://www.postimage.org/Ts1wM7c9.jpg" border="0" alt="Free image hosting powered by PostImage.org"></a>

Needless to say the lightened one is on the left!

Here are top and bottom pictures, needless to say with the clutch cover and friction disc fitted its still lighter than a normal flywheel! (might be that the clutch cover is also lightened as its full of drilled out holes).

<a href="http://www.postimage.org/image.php?v=Ts1wML6r" target="_blank"><img src="http://www.postimage.org/Ts1wML6r.jpg" border="0" alt="Free image hosting powered by PostImage.org"></a>

<a href="http://www.postimage.org/image.php?v=Ts1wNby0" target="_blank"><img src="http://www.postimage.org/Ts1wNby0.jpg" border="0" alt="Free image hosting powered by PostImage.org"></a>

Needless to say more toys to play with than I know what to do with, and its all going to get more complex.
Last edited by pbottomley on 03 Oct 2009, 12:08, edited 1 time in total.
pbottomley
 

Postby Gordo » 03 Oct 2009, 11:52

I've mentioned this in other threads, but with the overbore it's even more important.
Two of the end gasket head holes should be slightly smaller than the rest, cut the heads of a couple of the long head bolts and slot them so you can use a screw driver to turn them. When you're ready to fit the head gasket and head, put these cut down bolts into the block to correctly align the gasket and head to the block then fit the other bolts before unscrewing the cut off bolts and replacing with proper ones and torqueing down. If you get the alignment wrong the head gasket is VERY likely to fail as it may not seal properly between 1&2 or 3&4 and overheat before blowing.
Personally, it's something I would recommend doing on ANY Chevette engine.

As for the rocker/inlet gasket, whilst you may decide to simple cut them out of ordinary material, you should be able to find a gasket specialist who can cut suitable re-inforced gaskets by laser - if not, check out the local metal suply/fabrication companies as they should be able to point you to someone who does profile cutting with LASERs who can do the job. May be a little expensive but if you get several done at the same time it shouldn't be too bad - remember it has to come off for setting the valve clearances.
ttfn

Gordo
Gordo
Classic Old Timer
Classic Old Timer
 
Posts: 523
Joined: 27 Dec 2006, 07:58
Location: Auckland, New Zealand

Postby pbottomley » 19 Oct 2009, 17:31

Long time since i have updated this thread, bad news... the head is rubbish :cry:

The valve stems are so worn one can rattle the valves in the them, it doesnt help that the person who "modified" the head decided to machine half the stems away to open out the inlets...

I have three choices,

1/. bigger valves (that's gona be a hard one)
2/. drill out the stems and put in bronze and re drill the guides
3/. get another head and start all over again

either way this is now becoming an expensive engine, the only parts of it that will remain form the old engine are the cam, tappets and pistons... LOL maybe I should put it to one side till i see what else pops up
pbottomley
 

Postby ross.cheeks » 19 Oct 2009, 17:56

:( bloody cars, my engine is in bits at the mo as well, still havent got around to getting it back together although ive got a new timing chain kit so the bottom end can all be done soon.
User avatar
ross.cheeks
Advanced Motorist
Advanced Motorist
 
Posts: 490
Joined: 27 Jan 2007, 20:58
Location: aberdare drives:'77 chevette hatch

Postby Gordo » 20 Oct 2009, 09:39

Have you miked the valve stems yet? I've come across a few really sloppy cases where the stems were actually OK and used thin wall insrts for the guides and they were a perfect fit, clearance wise. In your case, if the stems are OK, I'd see my local, reputable machine shop and get them to fit new guides as they can get the angle and interference fit correct. Shouldn't be that expensive, either.
ttfn

Gordo
Gordo
Classic Old Timer
Classic Old Timer
 
Posts: 523
Joined: 27 Dec 2006, 07:58
Location: Auckland, New Zealand

Postby pbottomley » 20 Oct 2009, 19:11

Right I ve done some more research on the head, The present valves are a few MM longer than normal valves, but interestingly the inlets are 6.9mm and the exhaust 6.8mm Dia, which is smaller than the normal Viva Valves... SO maybe if I can find some nice stainless valves that at 7mm Dia I can get the head reamed out and still use it.

However this means finding the valves and it does assume the valve seats are still salvageable (doubt it) and the stem lengths are okay. I still think I will need to start again with a new head and use slightly smaller inlet valves (these are 36.5mm ones) so the seats don't overlap, and more importantly I still have the stem guides to hold the valves in the right plain. :roll:

Right who makes nice 100mm long 7mm dia stainless valves with 30mm and 36.5mm faces (or slightly smaller)
pbottomley
 

Postby ross.cheeks » 21 Oct 2009, 16:47

what about mini ones?
User avatar
ross.cheeks
Advanced Motorist
Advanced Motorist
 
Posts: 490
Joined: 27 Jan 2007, 20:58
Location: aberdare drives:'77 chevette hatch

Postby pbottomley » 21 Oct 2009, 17:26

Too short
pbottomley
 

Postby ross.cheeks » 21 Oct 2009, 23:40

is there nowhere that does uncut ones? then you could get them done to what ever u need, not sure but im guessing theres no real cheap fix
User avatar
ross.cheeks
Advanced Motorist
Advanced Motorist
 
Posts: 490
Joined: 27 Jan 2007, 20:58
Location: aberdare drives:'77 chevette hatch


Postby pbottomley » 24 Jan 2010, 11:02

Latest update on this engine isnt good, but I am still being positive about it.

Took the very thin flywheel and clutch over up to the balancers, and got them checked over all well there.

Good a couple of new crank's ready to balance and one to lighten (going to go silly with this one). Not yet popped them up tot he machine shop to grind to suit bearings and or balancers after to do his magic, until I get the right bearings first.

The block is all greased up and in storage out of the way for now, But I do need to find plus 60 pistons. The other ones are fine, but its going to be almost impossible to balance them unless I take the pistons off first, and that runs the risk of damage.

The head is another story all together, I think its beyond help, with the common bridge between the valves its almost impossible to re-cut a seat.

So I might just be on the look out for a good head and see how it goes?

Also picked up a 40 Webber and manifold on my travels on the cheap
pbottomley
 

Postby Shuvit-pinto » 24 Jan 2010, 11:13

If you are looking for a head then I have several here. you are welcome to come and look at what I have and choose the one you want.

Mark
User avatar
Shuvit-pinto
Forum Parts Squirrel
Forum Parts Squirrel
 
Posts: 1414
Joined: 01 Feb 2005, 00:58

Postby pbottomley » 24 Jan 2010, 11:19

Cheers for the offer Mark, at some point I will come and have a look, but as I said the engine is somewhat to one side for now, i seem to have a few things to do first !

1/. get an MOT on this wee beastie
Image

2/. rebuild this car from a bare shell (some of it done)
Image

3/. finish off the 1159 engine for the above car:
Image

Then maybe relax a little then dive into the 1256... :D :D
pbottomley
 

Postby Shellysowner » 24 Jan 2010, 16:45

Blimey! Are you in the process of completely re-building Marvin there PB? You have been busy!!
Doive wrote:I remember last summer being in another Chevette with a quite mad driver, and we were drifting round A class roads at 65mph with the tail sliding progressively on the corners. It was fantastic.

1980 Chevette L Hatch
<s>1980 Chevette L Estate</s>
User avatar
Shellysowner
Neverending moaner - lack of space!
Neverending moaner - lack of space!
 
Posts: 4384
Joined: 08 Jan 2005, 01:50
Location: Cambridge

PreviousNext

Return to Engine & Gearbox

Who is online

Users browsing this forum: No registered users and 1 guest