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Grouseslayer2
Samba Member
Joined: January 22, 2022
Posts: 16
Location: PA
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 Posted: Sat Oct 19, 2024 9:05 am Post subject: Mystery fuel leak |
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2110 dual port with dual Weber IDF 40s,
I just discovered a fuel leak that drips off of the left side of the engine bottom next to the oil plate (off the corner). Only when the engine is running.
When I look underneath the base of one of the cylinder jugs is wet with gas. Engine is hard to start but once warmed up it idles well. Slight hesitation of the line when driving.
I’ve checked all of the fuel lines and all around the left carb. This is really starting to drive me nuts.
Any ideas? Thanks. |
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mikedjames
Samba Member
Joined: July 02, 2012
Posts: 3310
Location: Hamble, Hampshire, UK
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| Posted: Sat Oct 19, 2024 9:08 am Post subject: Re: Mystery fuel leak |
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Check your oil level ...
It could be a fuel metering needle letting loose (it probably is anyway), but it may be filling the sump with fuel..
_________________
Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
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Grouseslayer2
Samba Member
Joined: January 22, 2022
Posts: 16
Location: PA
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| Posted: Sat Oct 19, 2024 9:20 am Post subject: Re: Mystery fuel leak |
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| mikedjames wrote: |
Check your oil level ...
It could be a fuel metering needle letting loose (it probably is anyway), but it may be filling the sump with fuel.. |
Oil level seems fine. Probably needle and seat like you said but just wondering where it could be flowing from. Base of cylinder jug where it enters the case is wet with gas but it is only gas. No oil |
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mikedjames
Samba Member
Joined: July 02, 2012
Posts: 3310
Location: Hamble, Hampshire, UK
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| Posted: Sun Oct 20, 2024 1:04 pm Post subject: Re: Mystery fuel leak |
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Thinking about it - what if it is running down the hidden front of the left hand intake manifold from a carburettor throttle spindle, then running along under the head tinware from left to right towards the engine block itself , or dripping down partway along the tinware somewhere where it gets blown back towards the block.
_________________
Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
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NJ John
Samba Member
Joined: September 21, 2007
Posts: 2880
Location: HdG, MD & NJ
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| Posted: Sun Oct 20, 2024 6:51 pm Post subject: Re: Mystery fuel leak |
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Stock fuel pump or electric? How about a pic? Just asking, because I’m guessing there’s a fuel tee and or a regular involved? The drip could be far from the actual source.
_________________
1973 standard, yellow, lowered, 3” narrowed front, 1600 blo-thru turbo w/single dell 15.4@86, so far
11.41 et buggy. Long gone
Let’s go O’s! Let’s go O’s!
https://www.youtube.com/@AirSpooledGarage |
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Grouseslayer2
Samba Member
Joined: January 22, 2022
Posts: 16
Location: PA
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| Posted: Tue Oct 22, 2024 4:24 am Post subject: Re: Mystery fuel leak |
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| NJ John wrote: |
| Stock fuel pump or electric? How about a pic? Just asking, because I’m guessing there’s a fuel tee and or a regular involved? The drip could be far from the actual source. |
Here’s a pic. Gas drips off of the circled corner (drivers side towards front of car) at a rate of about one drop every three or 4 seconds only when running. After drying there is some oil in it. Changed mechanical fuel pump to rebuilt pierburg but still drips. Engine ran fine on stand with no drips. I went over all fuel lines and cannot find leak. Seems like it it dripping from around base of cylinder 4 (could be coming from above maybe).
Only other thing I can think of besides bad float or needle is when I installed the engine into the car, I have to remove the carbs and intake manifolds so it would fit then reinstalled them. If gasket is leaking I can’t understand the path the fuel may be taking. I have carb rebuild kits on order. Going to rebuild both carbs and reinstall intakes and carbs with different gaskets. I’m going to turn green and lose it if that doesn’t work. 
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calvinater
Samba Member
Joined: September 06, 2014
Posts: 3573
Location: 802 The Pointless Forrest
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| Posted: Wed Oct 23, 2024 2:50 am Post subject: Re: Mystery fuel leak |
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Please excuse my ignorance, what is that piece with all the holes drilled in it ?
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"Albatross"! |
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mikedjames
Samba Member
Joined: July 02, 2012
Posts: 3310
Location: Hamble, Hampshire, UK
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| Posted: Wed Oct 23, 2024 10:03 am Post subject: Re: Mystery fuel leak |
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From the yellowish staining on that nonstandard perforated pushrod tube protector plate, it looks like fuel is running towards the engine block across the plate then dripping out of the three holes nearest the block.
Take the plate off, its not doing much work with the car standing still and see where the drips come from then.
It probably is blocking a fair amount of cooling air in any case.
_________________
Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
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