Oil Leak at alternator bracket
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I seem to have an oil leak that appears around the lower alternator bracket that bolts to the block. Does anyone know if these threaded block holes go all the way through the block? If this is the case should the two bolts be coated in Wellseal or similar to seal the thread and prevent oil seeping through?
- William2
- Fourth Gear
- Posts: 983
- Joined: 20 Jan 2013
The mounting bosses all have blind holes (or, at least, did originally). However, these engines can blow a small amount of oil out of the dip stick tube which then collects on the alternator bracket below the mounting bolts. This can be hard to trace as there probably will not be much oil around the tube. As least you can easily check if this is the cause by wrapping some tape around the tube / stick joint as a temporary seal.
- NickD
- Second Gear
- Posts: 51
- Joined: 13 Sep 2003
Plenty of opportunity for leaks in the area from the front cover, sump and dip stick tube. Unlikely to be from the bolt holes but I have had a block crack at the threaded holes bosses and if these cracks go through then a leak could occur.
cheers
Rohan
cheers
Rohan
-
rgh0 - Coveted Fifth Gear
- Posts: 8815
- Joined: 22 Sep 2003
I had a crack in the head in this area too, where the head screws to the timing chain case. Not easy to see from the outside but oil seeps down from there and along the joint so it looks like the gasket has failed. The alternator was permanently covered in a film of oil until I fixed it!
Nigel F.
Nigel F.
1970 S4SE/1760cc big valve/SA-AX block, L2s, 45DCOEs, 1978 Jensen GT, 1962 AH Sprite, Alfa-Romeo 159, 1966 Bristol Bus, 1947 AEC Regal bus.
- nigelrbfurness
- Fourth Gear
- Posts: 515
- Joined: 04 Apr 2008
My dip stick tube was a problem leaker. I wound up slipping a thin washer over the stick and made a rubber disc seal between that and the tube. A spring now loops through the finger pull and pulls the stick down tight against the tube. Made a significant difference.
Rob Walker
26-4889
50-0315N
1964 Sabra GT
1964 Elva Mk4T Coupe (awaiting restoration)
1965 Ford Falcon Ranchero, 302,AOD,9",rack and pinion,disc,etc,etc,etc
1954 Nash Healey LeMans Coupe
Owning a Lotus will get you off the couch
26-4889
50-0315N
1964 Sabra GT
1964 Elva Mk4T Coupe (awaiting restoration)
1965 Ford Falcon Ranchero, 302,AOD,9",rack and pinion,disc,etc,etc,etc
1954 Nash Healey LeMans Coupe
Owning a Lotus will get you off the couch
- prezoom
- Coveted Fifth Gear
- Posts: 1332
- Joined: 16 Mar 2009
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