Engine/starter issues with new lump

Dirrt · March 02, 2011, 01:47:32 PM

Yeah... When I lived in Malvern. I've moved to Castle Donington

Thank you very much for your generosity though!

Dirrt · March 05, 2011, 11:22:55 AM

Here is my illustration of the timing marks on the engine.

The new starter now works, and I've had some more experiments.

With the timing advance one tooth from "A" (my first setting) it wouldn't start even bumping it, but was noisy. Today I fitted a new starter motor and the car didn't start but I think I heard valves hitting pistons... I stopped cranking it and turned it over by hand but it only spun 90deg before stopping... Presumably valve on piston.

So I removed the cambelt again, put the crank to TDC, then tried turning the cam by hand. Turning it clockwise, the timing mark on the cam got in line with the plastic timing mark on the cambelt cover then dink... It hits the piston or something. So I retarded the cam one tooth before where it was initially. Now it doesn't start but turns over freely. It starts coughing when I push the throttle but sounds like it's just popping in the exhaust manifold so I now fear I've bent the damn valves!! GRRRRR!!

So could anybody tell me where I've gone wrong with the timing marks? Or clarify why this piper cam doesn't use proper timing marks or something?

Dirrt · March 05, 2011, 11:53:29 AM

http://www.clubpolo.co.uk/forum/lofiversion/index.php/t167262.html

FFS. Why does nobody tell me I need a dial gauge and a timing disc and shizz? Darnit. I've never dealt with an aftermarket cam before so I can't even blame someone else. Anybody got any experience of this anyway?

PeteG40 · March 05, 2011, 12:47:02 PM

think you hit the nail on the head.

Actually when i emailed piper about cam specs they were very helpful!

Dirrt · March 05, 2011, 12:53:18 PM

Thanks Pete. But what's best for me to do now? I don't have a DTI handy or an angle gauge! So even if I had the cam specs they wouldn't be much use. I think I might just fit the standard camshaft and if it doesn't run I know the valves are shafted.

If so then I'll have to get the old big valve head cleaned up and reinstalled. Urgh.

PeteG40 · March 05, 2011, 12:56:06 PM

i would personally use a normal cam till piper tell you the specs and how to time it up etc...

or wait and get a vernier and play about

Dirrt · March 05, 2011, 01:14:41 PM

Cheers. That's what I think too. Get a known benchmark!

Weve got the receipt from jabba for fitting the big valve head and piper cam in 2003. Since piper only list one cam for the G40 I assume it's this one...

http://www.pipercams.co.uk/pipercams/www/product.php?pid=G40BP270H

So I've got my cam timing and could google how to time it up and what equipment I need, but I think fitting the standard cam would at least get us running and hopefully prove if the head is ok or not.

Working on cars that were modified/built by previous owners sucks.

PeteG40 · March 05, 2011, 01:20:10 PM

you can check which one it is as they are stamped on the end

pete

Dirrt · March 05, 2011, 01:24:30 PM

Bonus. Thanks. I'll get back to you with how we get on.