Too much oil in rocker covers!

General Chat About Engine Build

Moderator: phpBB2 - Administrators

SuperV8
Guru
Guru
Posts: 787
Joined: Tue Jul 07, 2009 11:25 pm
Location: West midlands

Post by SuperV8 » Wed Jul 12, 2017 10:33 am

Also don't assume new (aftermarket) parts are correct, i've brought replacement rockers and shafts before and the diameter of the new rockers is more than the oval worn dimension of the old worn ones! Fitted on the new shaft there was a lot of play. Sent them back and the replacements (different brand) where a lovely close fit on the shaft.
I would always measure your new parts to ensure they are in spec.

Tom.


Dax Rush 4.6 supercharged V8 MSII

SuperV8
Guru
Guru
Posts: 787
Joined: Tue Jul 07, 2009 11:25 pm
Location: West midlands

Post by SuperV8 » Wed Jul 12, 2017 10:33 am

Also don't assume new (aftermarket) parts are correct, i've brought replacement rockers and shafts before and the diameter of the new rockers is more than the oval worn dimension of the old worn ones! Fitted on the new shaft there was a lot of play. Sent them back and the replacements (different brand) where a lovely close fit on the shaft.
I would always measure your new parts to ensure they are in spec.

Tom.
Dax Rush 4.6 supercharged V8 MSII

mgbv8
Forum Contributor
Forum Contributor
Posts: 5326
Joined: Sat Nov 18, 2006 7:57 pm

Post by mgbv8 » Thu Jul 13, 2017 10:24 pm

garrycol wrote:Why use old cork gaskets - horrid things - use the much newer rubber ones that are slotted sit down on the edge of the head - use a bit of sealant ans the metal col-lets prevent overtightening and the ribber squishing out like cork can do.
Use the new rubber ones with the collets then Garry. The Cork ones (fitted as I said) will do the job easily. If the cork gaskets are fitted as I said before they wont stretch. Your rubber ones with the collets will leak eventually ;)

Markus
Newbie
Newbie
Posts: 44
Joined: Sat Apr 21, 2012 10:36 am
Location: Australia

Post by Markus » Mon Jul 17, 2017 11:13 pm

Thanks for all the info guys.
I have rubber gaskets on the engine now but I'll try new ones and glue them to the covers. Give that a try. If still a worry I'll try the corkers.
Engine is still pretty new and was built for me by one of the better shops in the UK so I'd be pretty disappointed if the rockers and shafts are worn that much.
Not revving the nuts off it (my limit is 6k and most of the time I'm only using 5.5k) but long corners like turn 2 at Phillip Island seem to be the culprit.
Cheers!
Mark
Triumph TR7/V8 race car
Triumph TR6 road car

mgbv8
Forum Contributor
Forum Contributor
Posts: 5326
Joined: Sat Nov 18, 2006 7:57 pm

Post by mgbv8 » Tue Jul 18, 2017 6:45 pm

I bought a set of brand new rockers from a well known uk engine builder several years back. They were looser on the shafts than the 100,000 mile ones I took off. Cheap Chinese copies I guess.

He took them back and stopped selling them.

unstable load
Top Dog
Top Dog
Posts: 1235
Joined: Mon May 04, 2009 6:53 am

Post by unstable load » Wed Jul 19, 2017 5:39 am

There was a bloke on the Classic Rover Forum that made a set of shafts and bushed his rockers as an experiment. He was very happy with them and was, as far as I recall, roadtesting them before deciding if he would go on to sell them or not.
Cheers,
John

Richard P6
Getting There
Getting There
Posts: 207
Joined: Sat Feb 14, 2009 11:04 pm
Location: Yorkshire

Post by Richard P6 » Wed Jul 19, 2017 11:57 pm

DaveEFI wrote:As an aside, the mention of EvoStick reminds me the current stuff is nothing like as good as the original. Think they changed the solvent. Is there a better alternative?
New legislation means that we cannot sell contact adhesives that contain Toluene to the general public, only companies.

So you need to buy an industrial grade contact adhesive like Alpha S758 or S1358, Evostik GP Contact Adhesive, or anything that still contains Toluene.

Richard

unstable load
Top Dog
Top Dog
Posts: 1235
Joined: Mon May 04, 2009 6:53 am

Post by unstable load » Thu Jul 20, 2017 5:29 am

If you can locate some, there is a wonderful product we use in aviation that will sort your sticking requirements out nicely.
It will stick your gaskets to the covers or sump with no issues and it is a brilliant tank sealant, too.
A word of caution... DON'T stick something you will want to remove again one day....
It goes under the generic name of PRC.

http://www.ppgaerospace.com/Products/Se ... alant.aspx

http://www.ppgaerospace.com/Products/Se ... alant.aspx

http://www.ppgaerospace.com/Products/Se ... alant.aspx
Cheers,
John

DaveEFI
Forum Contributor
Forum Contributor
Posts: 4193
Joined: Fri Feb 26, 2010 4:27 pm
Location: SW London, UK

Post by DaveEFI » Thu Jul 20, 2017 8:45 am

Richard P6 wrote:
DaveEFI wrote:As an aside, the mention of EvoStick reminds me the current stuff is nothing like as good as the original. Think they changed the solvent. Is there a better alternative?
New legislation means that we cannot sell contact adhesives that contain Toluene to the general public, only companies.

So you need to buy an industrial grade contact adhesive like Alpha S758 or S1358, Evostik GP Contact Adhesive, or anything that still contains Toluene.

Richard
Excellent - thanks Richard.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y

Post Reply

Return to “Engines Area”