02EX_PSD
Not as Junior of a Member
My rear main seal is leaking on my '02 7.3 and I need to replace it. Any suggestions on a replacement seal brand or any speciality seals? Thanks as always.
Rear Main Seal leaking
- Thread starter 02EX_PSD
- Start date
First, It's Very Highly Unlikely the Rear Main is leaking.
Look for oil in the valley, then along the oil rails/heads.
On a 7.3 (fuel too)..Oil will leak from the above areas.. run down along the rear of the heads, passed the starter, down the bell housing.. and drip off of the lowest point.. Making You THINK the rear main is shot.
Check those First'n let us know what you find ??
Joe
Look for oil in the valley, then along the oil rails/heads.
On a 7.3 (fuel too)..Oil will leak from the above areas.. run down along the rear of the heads, passed the starter, down the bell housing.. and drip off of the lowest point.. Making You THINK the rear main is shot.
Check those First'n let us know what you find ??
Joe
Last edited:
iracemine
black and tan
yeah its usually from the valley.
copracr
Full Access Member
I had both leaks, I replaced the rear main with a fel-pro from advance. Lasted 20K so far and I just pulled the transmission again and its still dry.
CHPMustang
Senior Member
Ford OEM hasn't let me down when it comes to rear main seals 
befreezy
SDD Junior Member
check you high pressure oil pump. the same thing happened to me about two months ago i was told it was the rear main seal. i went to get a second opinion and it turns out that it was just a bad gasket on the pump.
DaveBen
SDD Senior Member
Ford diesels don't blow the rear seals. 99.9% are leaking from the valley. The HPOP of turbo leaking are the main causes.
Dave
Dave
Racinghcr
Racinghcr
I have heard that the new ,low sulfur diesel fuel will eventually eat the small seals that are on the presure relief value on the back of the fuel filter canister. This value is(yellow color) on the back of the fuel filter canister that you can manually drain any water or bad fuel from the canister. Mine slowly leaked ,I smelled fuel,and saw some fuel coming down the back of the engine when changing oil. My mechanic at our FORD Dealer said he has changed several recently and they have never been an issue until the new ,ultra-clean diesel fuel came out. Cost is about $35-40 for the parts and I guess not hard to change. Might look into this as a possible solution. PS: Has anyone replaced this fuel drain value ?? Any tips?? PS #2 Has anyone noticed the rapid doubling of Diesel Oil Prices in the last 6-7 months??
dpantazis
#12
the fuel drain orings leak do not leak because of USLD. they leaked before that fuel went to market. be careful what you hear and what you believe.
