4.0 Minor Oil Leak
Discussion
I have a very small oil leak, which appears to be around the two rearmost sump bolts.
1. Is there aknown issue that I don't know about which looks like a leak from the sump, but isn't?
2. The sump appeaes to have a bead of silicon as a gasket (I haven't dropped it yet, so there may be a gasket as well). What should I be using - gasket/silicon/both?
3. Which oil is recommended? Road use only.
TIA
1. Is there aknown issue that I don't know about which looks like a leak from the sump, but isn't?
2. The sump appeaes to have a bead of silicon as a gasket (I haven't dropped it yet, so there may be a gasket as well). What should I be using - gasket/silicon/both?
3. Which oil is recommended? Road use only.
TIA
Been through this ad inifiditum on a rebuilt 4.5 against my better judgement the silicone bead appears to be the preferred install method for the sump,there is a rubber gasket available and also cork. I tried the rubber and it fell apart in a week
Make sure you use the correct silicone if you go down this route....if you have a hunt a few pages back on this forum you will find a thread ref oil leaks and the silicone is listed here
The rear 2 sump bolts go into the rear main bearing housing and require sealant on them as they enter the oil ways,you will also notice that some of the side bolts appear close to oil areas as well so on my 4 attempt at stopping leaks I sealed these as well
The rear sump area also has 2 cruciform rubbers seals within the bearing cap the ends of these should protrude a couple of mm into the sump line, depending on who or how these have been fitted you may have a leak within the bearing cap,don't forget the chances of the rear main seal leaking and running down the back of the sump
If you remove the sump check the oil pick up strainer for excess silicone bead that may have found its way there
Which oil to use.....long debate!!
Rich
Make sure you use the correct silicone if you go down this route....if you have a hunt a few pages back on this forum you will find a thread ref oil leaks and the silicone is listed here
The rear 2 sump bolts go into the rear main bearing housing and require sealant on them as they enter the oil ways,you will also notice that some of the side bolts appear close to oil areas as well so on my 4 attempt at stopping leaks I sealed these as well
The rear sump area also has 2 cruciform rubbers seals within the bearing cap the ends of these should protrude a couple of mm into the sump line, depending on who or how these have been fitted you may have a leak within the bearing cap,don't forget the chances of the rear main seal leaking and running down the back of the sump
If you remove the sump check the oil pick up strainer for excess silicone bead that may have found its way there
Which oil to use.....long debate!!
Rich
Sardonicus said:
The rear cruciform T seals should not protrude that's just some lazy bugger as not trimmed them flush on build, I find the rear seal more than capable of doing its job it's taking care to seal the sump correctly that pays off, really no need to accept leaks on the RV8
Funny that ref the cruciform seals when a well known builder advises to leave them proud to be able to squash down into the sump pan,certainly me not being the lazy bugger did trim them on first build but had leaks,subsequently left them proud and had no further issues? Rich
sheel said:
Funny that ref the cruciform seals when a well known builder advises to leave them proud to be able to squash down into the sump pan,certainly me not being the lazy bugger did trim them on first build but had leaks,subsequently left them proud and had no further issues?
Rich
When ever there is a break or join in a gasket face a small pip of sealer should be used anyway so your builder just has a slightly different approach for the same ends Rich
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