hey i am sure this question have been bought up many many times, but i couldnt find one in the archieve that is like my problem, well here goes.

my 402 truck 70 big block runs fine under 2000rpm, but once i get on at 2500-3000 rpm, it will start to leak oil and it gets all over the fuel pump. after driving and looking at the oil, it is over the 4th cylinder (2nd cylinder closest to front on passenger side) spark plug wire and sparkplug, and the oil would get all over my control arm and everything near there. any idea on where this is coming from?

thanks for your time
alan

May be just me, but I think I remember reading somewhere that there were some bolts by the fuel pump that have to have sealant on them or else they will leak. It could be valve cover or an exhaust leak. I would do some more diagnosing. Follow the trail. Dry up everything that is wet, start all over again, and follow where it leads to or from.

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Trever Maas
TC Member #: 1432

1972 Chevelle Malibu
Mohave Gold
L65 350/M38 TH350
2.73 AXL RATIO

1948 Chrysler Windsor
Flathead 6/Semi-Auto
4 Speed Column Shift
Fluid Drive Transmission

"Both Undergoing Slow Restorations"

Sounds to me that it is the upper bolt hole in front of the fuel pump. What you are supposed to do is inststll a long bolt to hold the fuel pump push rod in place when installing the fuel pump. Once the pump is in you take out the long bolt and put in a small one to keep oil from spewwing out like in your case. I hope this helped!!!
Brian

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71 Chevelle
http://photo.starblvd.net/~CHELK/2-3-4.jpg
72 El Camino(71 front)<A HREF="http://photo.starblvd.net/~CHELK/2-1-1.jpg" TARGET=_blank>
http://photo.starblvd.net/~CHELK/2-1-1.jpg
</A>

Which side is your dipstick on? Know my s/b had a habbit of lifting the stick and blowing oil out the tube at high r's. Slight crimp fixed that one.

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Sid Coleman, 71 Ragtop
TC (Gold) #174, MCC #347,
Aces #5457, N3JHV@bellatlantic.net

<BLOCKQUOTE>quote:</font><HR>Originally posted by CHELKAMINO:
Sounds to me that it is the upper bolt hole in front of the fuel pump. What you are supposed to do is inststll a long bolt to hold the fuel pump push rod in place when installing the fuel pump. Once the pump is in you take out the long bolt and put in a small one to keep oil from spewwing out like in your case. I hope this helped!!!Brian
<HR></BLOCKQUOTE>

alright, ill look at the pump once i get a change, thanks. for now, ill put a bag around it and see if oil collects.

<BLOCKQUOTE>quote:</font><HR>Originally posted by Sid Coleman:
Which side is your dipstick on? Know my s/b had a habbit of lifting the stick and blowing oil out the tube at high r's. Slight crimp fixed that one.
<HR></BLOCKQUOTE>

my dipstick is on the right side, what do you mean by slight crimp? thanks.

No No NO...this oil leak has nothing to do with the fuel pump. The bolt hole i am talkin about is the one NEAR the fuel pump in the front of the block.
Brian

oh- now it makes sense - i checked it and it doesnt seem to be coming out from that place. thanks for your suggestion.

<BLOCKQUOTE>quote:</font><HR>Originally posted by slpin:
my dipstick is on the right side, what do you mean by slight crimp? thanks.<HR></BLOCKQUOTE>


Alan,

Sounds like multiple leaks http://www.chevelles.com/forum/frown.gif
Front of the engine could be front seal or timing chain/harmonic balancer seal. As to the 4th cylinder, control arm area, you may want to verify how your dipstick is seated in your block or pan, (not sure about a BB). Wipe it down then go for a spin, see if you can locate the source.
As to the crimp-I slightly bent my dipstick tube so the dipstick 'head' seated firmly in the tube. That stopped the lifting at high rpm.
PS-my symptoms were oil over the a-arm and inner wheel housing, and firewall.



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Sid Coleman, 71 Ragtop
TC (Gold) #174, MCC #347,
Aces #5457, N3JHV@bellatlantic.net

check the pcv and valve cover gaskets. more pressure builds up in the top of the engine at higher rpms and the pcv is needed to releave some of that pressure.

What brand/type of fuel pump are you using? The reason I ask is that I had a Carter with the screws around the diaphragm and it leaked like a sieve at high rpm. Change to a crimp style AC and no more leaks.

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Dave Bradley
www.corvetteforum.net/classics/d1_bradley (http://www.temp.corvetteforum.net/classics/d1_bradley)
'69 SS396 ragtop
'33 3W Coupe
'65 Vette BB Roadster

hey all, sorry got home a bit late, ill check those out tomorrow - as for fuel pump, its a holley

http://216.71.10.3/mychevelle/outfuelpump.JPG
http://216.71.10.3/mychevelle/closefuelpump.JPG

[This message has been edited by slpin (edited 01-22-2003).]

My first question would have been, was the engine recently rebuilt ?
I see now by the pictures you posted that it has been. right ?

It looks like you are having the same problem I am having with my 69 396. Oil spewing on the passenger side covering the front of the lower control arm, motor mount and the fuel pump. Of course it seems to go all over the place from there back (cause of traveling down the road).
I've come to the conclusion that my leak (which sounds just like yours), is coming from the keyway in the crankshaft. I totally forgot to put a dab of sealer there when installing the damper (was getting excited that engine was almost ready to stab).

And I've been too lazy to fix the problem.

I think the fan throws it all to the passenger side.

Let us know if this is it. Did you seal the keyway ?


Nate

also, what do you guys think i should do to get hte valve cove rout?

http://216.71.10.3/mychevelle/valvecover.JPG
http://216.71.10.3/mychevelle/valvecovercu.JPG

That's too easy.

Unbolt the power brake booster from the firewall. There will be four nuts and their not real easy to get to. I've found the new ratcheting combo wrenches work nicely. (Gearwrench).
It's a tightly confined area and you don't have much throw.

This should allow you to move the booster over enough to get the valve cover off.


Nate

That row of screws around the top of the pump is EXACTLY like the Carter I had. Leaked bigtime at higher rpm's. Tightened down the screws (big screwdriver) helped but not stopped. Changed to crimp style pump. Problem solved.

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Dave Bradley
www.corvetteforum.net/classics/d1_bradley (http://www.temp.corvetteforum.net/classics/d1_bradley)
'69 SS396 ragtop
'33 3W Coupe
'65 Vette BB Roadster

Do you have a fresh air vent in your other valve cover? If not, you need one, or you build up pressure in the engine and blow oil out of somewhere, usually the dipstick tube.

thank you all for the reply, i will check those on saturday and let you know how it turns out - thanks

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Alan

1969 Chevelle SS396 code 72 (http://216.71.10.3/mychevelle/)

<BLOCKQUOTE>quote:</font><HR>Originally posted by Gene McGill:
Do you have a fresh air vent in your other valve cover? If not, you need one, or you build up pressure in the engine and blow oil out of somewhere, usually the dipstick tube.<HR></BLOCKQUOTE>

yes, i have a breather on the passenger side.

SS3964N8: How are you leaking oil out of the keyway slot? If it could push itself into the slot,I would think it would be stopped by the balancer washer. I have never had a leak there and I don't put sealer in there.

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1969 SS 396 Camaro/Th 400/355s.(454 now)
Not a Chevelle but the BBC guys are here!

thanks, ill give it a try, and with my little torque wrench, its pretty hard to get to.

<BLOCKQUOTE>quote:</font><HR>Originally posted by SS3964N8:
That's too easy.

Unbolt the power brake booster from the firewall. There will be four nuts and their not real easy to get to. I've found the new ratcheting combo wrenches work nicely. (Gearwrench).
It's a tightly confined area and you don't have much throw.

This should allow you to move the booster over enough to get the valve cover off.


Nate<HR></BLOCKQUOTE>

i decided its my fuelpump - thanks all for helping me!

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Alan

1969 Chevelle SS396 code 72 (http://216.71.10.3/mychevelle/)