Engine running slightly hot

[Tug]

Hi,

Engine is a 2.0 cu.

I have previously given my engine a top end rebuild. Heads have been reconditioned (Guides, Some valves replaced, Some seats replaced).
Have rebuilt the engine with Victor Reinz gaskets. Painted the tinware Black and replaced the engine bay seal with a vw heritage one which makes it all very snug.
Tinware fits very tight..however i have some black silicone which I will run around the joints best I can. Its had new bosch plugs,Bosch cap and rotor arm and is running a 007 dizzy with vacuum advance only and is electronic.

Rocker covers are still black and have replaced Hydraulic lifters too. These are tightened to 1 and half turns when I installed them. Turned crank to tdc for each cylinder and adjusted them.
Oil in her originally when I first fired her up was Car lube 15/40 semi (Which I dont usually use). This has been changed to 20/50 Unipart mineral. Has a MANN filter installed (I drained the filter when I changed the oil).
Here is the other part which I know some people dont like..its had fitted on to her a 32/36 Progressive weber with manifold. The carb is supplied with a Webcon electric fuel pump and has a regulator installed. All fuel lines replaced with 8mm Gates etc fuel hose. It has a MANN fuel filter installed before the pump too. Fuel pressure is set to 4psi as per advice from 3 sources.

Van starts and runs lovely. Sounds really nice with no rattles and sounds strong.....However she appears to run hotter than before. I can no longer hold the dipstick after a run and the sump is very hot that I cannot keep my hand on it.

Im guessing its running lean and I noticed a very very slight pink !...yes I know pinking is not good on an Aircooled but have not driven the van since hearing this..I only drove about 10 miles so Im hoping no damage done. I have started her last night and it sounds nice.
With regard to the pinking im guessing the dizzy is set too advanced ? Although I did time it to 7.5 btdc..is this correct ?

The lean bit I know really needs to go on a rolling road to resolve it, however I have heard mixed results about rolling road tuning that buses etc have come back worse than they went in as some operatives dont know how to tune vw aircooleds correctly..so am a little reluctant to spend big bucks on this..although this would be my preferred option.
Im off to scotland in a months time so the van needs to do its thing and run well.

To be fair the van has never sounded so good. My solex carbs were really bad and leaking petrol so they had to go.

Any advice would be appreciated.

Thankyou

Glenn.

[toomanytoys]

I presume all tinware refitted and complete, with seal around engine bay too..
Carb prob not set up properly..
Yes timing is critical and whats the max advance above 3000 rpm?? what total advance does the 007 have? and is it a type 4 dizzy or a type 1?? type 4 engines dont like 009's or type 1 stuff in generall.. advance curves are all wrong and retardation on no3 makes that pot run hotter... the oe electronic dizzy works great.. and can be used as a single vac..

Tappets.. I'd never preload more then 1/2 turn.. seems to work really well...

air leaks on intake??
oil cooler flap is open???

[Tug]

Hi,

Thanks for the reply. The dizzy is the one that was fitted to the van when I purchased it 6 years ago. It looks like the original one just with a new vacuum advance fitted to it. The oil cooler seal is in place and the engine bay seal is new. All tinware present and correct. The only difference is it has been painted black..satin underneath and gloss on top to smarten it up.
I have noticed a tiny tiny leak of fuel at one of the inlets....I think im on the trail of the problem..its sucking air by the looks at it. I used the victor reinz steel inlet manifold gaskets..I will swap these for the fibre ones tomorrow and see what happens. The flaps are open..I have disconnected the thermostat until I sort this problem. Held my hand underneath oil cooler and it had a good flow of air through it.
My only other thought that I had was either it was blocked..but I always changed the oil in the past every 1000 miles and I never had this problem before, or I did the oil cooler up too tight and the orange seals have pinched and caused a tight flow through the oil cooler. Saying that I only nipped them up so they bulge slightly..did not want any leaks when it was back together.


Thanks

Glenn.

[sarran1955]

Hello,

Just run that past me again:

You set engine at TDC then set the valves....

Starting at no1 cylinder, then turn motor 1/2 turn anticlockwise then do nr 2, then 1/2 turn anti then 3 and so on.

What are you using as your reference for tdc, Its not the split between the case halves, more like 11 o clock.

Are you timing this with a strobe?

As said above what is your advance curve, what does the strobe show at 3000 rpm.

Video to help:

http://www.youtube.com/watch?v=4qayyc9Z4E0" onclick="window.open(this.href);return false;

Cordialement,

[Tug]

Hi,

I started at number 1 (Engine at tdc).
Then i turned the engine anti clockwise and did 2.
Then turned anti clockwise to 3.
Then turned anti clockwise to 4.

Each one was adjusted 1 and a half turns.
I have resolved the running hot issue now. It was the inlet manifold gasket on 3 and 4 cylinders causing the problem. just drove it 10 mile and pulled the dipstick and can hold it comfortably. Engine feels warm and not hot as before.

Although it has a tappet rattle appeared.....or is it a pink...sounds more like a tappet to me..
Great video by the way..is he local to kidderminster as I would pay him to tune mine now..
Glenn.

[Tug]

Hi,

As my first thread says..i have done major work to my engine. The engine runs well now better than it did before..however the rattle i mentioned in my previous post is still their. Its not a knock.

I had replaced my lifters (Hydraulic) a couple of weeks ago. However the engine has developed a rattle/tap when up to temperature and it gets louder under load....but then it dissapears and you wont hear it for 2 or 3 miles then it comes back.
If you start her from cold their is no noise rattles,bangs..rumbles.
Its coming from number 3 area.

Any ideas please ??

Thanks
Glenn.