a word off warning

[Engineer1949]

as title just a word on sump fitting i have a customers 5ltr car in, initially it came in for a new cam all fine but he had very poor oil pressure (tested with manual gauge) so i was asked to investigate, well cause is very badly worn shells both on mains and bigends but cause is the dreaded silicone sealant ,previously someone had refitted the sump presumably to stop a leak and used no gasket but a good helping off silicone off which most which ended up in the bottom of the sump to be picked up by the oil pump thus reducing flow, firstly why use silicone it is not any use as a sump gasket sealer personally i hate it far to slippery allows perfectly good gaskets to squeeze from between a joint, possibly hylomar, but what is wrong with a properly fitted gasket secret is to be scrupulously clean not a hint of anything on either surface make sure the sump is perfectly flat, far to many are over tightened and bent at the fixing holes, then apply the gasket and just tighten to just gently squeeze the gasket all will be fine, just a pic of one lump off silicone in the picup after sump removal.

john

Untitled by brundallmotorsport, on Flickr

Untitled by brundallmotorsport, on Flickr

[J400GED]

Point taken.

[jojackson4]

All wize words
But buy the look of the bottom of the block they used the full tube of silicone
I had the gasket on mine last year (cork) and started leaking so removed the sump and the oil pickup was
85% blocked with the gasket that had failed

You pay your money and all that

[Milky400]

Had the same with a well reputed tvr specialist local to me.

They had done a rebuild on the car a year prior to me buying. Whilst Looking through the paperwork it clearly stated sump gasket replace with a non cork one(can't remebr the exact terminology) had an issue with oil light coming on so immediately stopped and got it recovered. The garage it went to then Techniques in stotfold, who kindly recovered the car, found there to be not only a decaying cork gasket still in situ, but a load of silicon to add. All this being sucked up the pickups.

Never been to the guilty garage since, who also told me that a car I was interested in was "very expensive sir" without telling me the actual price, and will never use cork/silicon in the same situation

[phazed]

Silicon is wrong but a proper sealant correctly applied is the way to go.

I'm not disputing that a cork gasket doesn't work if correctly fitted just that people like Power and Turner Engineering don't use gaskets.

Dirko S or similar is the correct product if you're not using a gasket.

http://www.turnerengineering.co.uk/acatalog/info_2...