Oil leaking on startup?? huh? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cliffsta · 06-13-2006, 05:04 PM

Well we've been playing vehicle musical chairs the past few days. Well my truck was parked under the carport. I pulled it forward to wash it today and there was a fresh (as in, just hit the pavement) little pool of oil. I washed my truck and let it dry in the sun, then I had to move it back under the carport so my mom could pull in. Sure enough, there was another, smaller, puddle of oil, so fresh the glob of oil was still sitting above the pavement.

So why would oil leak on startup? Or is it just leaking somewhere from circulating then stopping?

I'm not about to tear into any major tasks or ordeals to fix a problem on a 26 year old motor but I am curious as to why it would seemingly do this. If it has some simple fix that would be cool, though.

As always y'alls thoughts are appreciated in advance b/c I'm sure I'll learn something like I always do.

cliff

Slonaker · 06-13-2006, 06:09 PM

I have had a leaky idiot light switch do this on a 305 before. It was located on the block right behind the distributor.

You should be able to find where it is coming from by looking for fresh oil on the engine. You might have to clean it pretty thoroughly to be able to tell what is new and what is old oil if it looks like most old engines.

Slonaker

Oldtruckfanatic · 06-13-2006, 06:24 PM

^^^^ I agree Also if it's recently started doing this check the drain plug and oil filter to make sure they are snug. You can usually see a fresh drop of oil if they're leaking so you can wipe them off and check again in a minute or two for a new drip forming. I see drain plugs with broken gaskets leaking all the time and they can leave a pretty good puddle if it's a constant drip.

06-13-2006, 05:04 PM	#1
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	Oil leaking on startup?? huh? Well we've been playing vehicle musical chairs the past few days. Well my truck was parked under the carport. I pulled it forward to wash it today and there was a fresh (as in, just hit the pavement) little pool of oil. I washed my truck and let it dry in the sun, then I had to move it back under the carport so my mom could pull in. Sure enough, there was another, smaller, puddle of oil, so fresh the glob of oil was still sitting above the pavement. So why would oil leak on startup? Or is it just leaking somewhere from circulating then stopping? I'm not about to tear into any major tasks or ordeals to fix a problem on a 26 year old motor but I am curious as to why it would seemingly do this. If it has some simple fix that would be cool, though. As always y'alls thoughts are appreciated in advance b/c I'm sure I'll learn something like I always do. cliff __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

06-13-2006, 06:09 PM	#2
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	Re: Oil leaking on startup?? huh? I have had a leaky idiot light switch do this on a 305 before. It was located on the block right behind the distributor. You should be able to find where it is coming from by looking for fresh oil on the engine. You might have to clean it pretty thoroughly to be able to tell what is new and what is old oil if it looks like most old engines. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado Last edited by Slonaker; 06-13-2006 at 06:11 PM.

06-13-2006, 06:24 PM	#3
Oldtruckfanatic Truck junkie Join Date: May 2006 Location: Reno NV Posts: 697	Re: Oil leaking on startup?? huh? ^^^^ I agree Also if it's recently started doing this check the drain plug and oil filter to make sure they are snug. You can usually see a fresh drop of oil if they're leaking so you can wipe them off and check again in a minute or two for a new drip forming. I see drain plugs with broken gaskets leaking all the time and they can leave a pretty good puddle if it's a constant drip. Last edited by Oldtruckfanatic; 06-13-2006 at 06:25 PM.



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