I've got a 61 beetle with a 71 engine, and I just did a engine overhaul (new machined valves, pistons, cylinders) we also have a brand new empi weber-clone Carb, and the gas is getting in the crankcase now,
any possible reasons?
2007-01-17 04:30:42 · 14 answers · asked by jesusanario 2 in Cars & Transportation ➔ Car Makes ➔ Volkswagen
it does run, but not well, it goes about 25 miles an hour going on flat road, and about 15 uphill, also it has some trouble starting, I did put the old carb back on, and changed the oil, and it still leaked into the crankcase
2007-01-17 07:45:11 · update #1
and the crankcase isn't cracked, I checked
2007-01-17 07:47:04 · update #2
I would suggest replacing the fuel pump. You might luck out, and that would be the quickest and cheapest fix.
2007-01-17 04:45:39 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You didn't say if the engine actually RUNS.
If it runs I am surprised you can detect the gas since the engine heat would vaporize it even if it made it to the crankcase.
Soooo I suspect that the engine will not run.
If it is that much gas that you can notice it, I would suspect the carb is dumping it into the manifold.... if you have the old carb put it back on and see if the problem goes away. Thats an easy thing to check before you move on to the rings and such.
.FOLLOWUP....
Ok.. so it DOES run and you swapped out the carb with no real change.
Next check your cylinder compression. All 4 should be about equal and around 110 psi. If any single cylinder is different by a lot (20+ lbs) then you have a ring or valve problem.
How do you know you are getting gas in there (see the part about evaporation)?
Timing could be doing this too. If your spark is firing at the wrong time or one cylinder is not firing at all, that gas is going to go down between the rings as well as out the exhaust..
Others have commented on the fuel pump and this is an easy thing to check.... put the old one back on and try again.
over to you....
.
2007-01-17 04:45:52 · answer #2 · answered by ca_surveyor 7 · 0⤊ 0⤋
too much carb , if its set rich or is otherwise leaking fuel into the engine, the new rings aren't fully seated and the gas ends up in the oil . go through the carb again and change the oil , then take it on the highway and let the engine get warm , check your oil after the highway run , keep an eye on this , hopefully your rings seat soon and a leaner setup on the carb helps , also run it on the highway at least once a week , short trips kill !
2007-01-17 06:36:57 · answer #3 · answered by sterling m 6 · 0⤊ 0⤋
I would look at my fuel pump. But if you overhauled it, I KNOW you did put a new fuel pump in. Even if your carbareutor leaked gas, there is no way for it to get to the oil. Now replace the oil in the morning and drive it around all day with no chance of anyone tampering with it and find if you have gas in it. Look at ALL possibilities if the the fuel pump is not the answer. That is the only way for fuel to get in the oil, THE ONLY WAY.
2007-01-17 04:38:01 · answer #4 · answered by Big C 6 · 0⤊ 0⤋
It is a very easy thing to do when going back with the stock fuel pump setup on a fresh rebuild. I had it happen to one of my club members. Putting a new offbrandname fuel pump on a rebuild you run the risk of still mismatching the pump to rod issue. what probably happend is that new fuel pump is for a generator rod instead of an alternator one. That mix up for sure will result on some cases a ruptured fuel pump diaphram or worst destruction of the pump itself. MY advice, stay with vw made or sponsered product when doing any parts replacement. Try changing that fuel pump and you should be fine.Good luck.
2007-01-17 08:48:03 · answer #5 · answered by vankstwer 3 · 0⤊ 0⤋
Josie Malcolm Missy Doctor Blues
2016-05-24 00:19:16 · answer #6 · answered by Anonymous · 0⤊ 0⤋
sounds like piston rings. Or bad machining with the cylinders or something... Whats interesting is that the gas isnt burning. Could have some serious issues with that engine
2007-01-17 04:34:47 · answer #7 · answered by Mr. Goodkat 7 · 0⤊ 0⤋
The other 2 answers are correct but add the possibility of carb problems IE: flooding, too much gas to the cylinders. You didn't state how it runs. good luck
2007-01-17 04:41:02 · answer #8 · answered by Larry L 2 · 0⤊ 0⤋
When you had the engine apart. did you check to see if it had a cracked block?
It sounds like it might have a cracked block.
The first thing to do with any engine overhaul is to check for a cracked block. If it's cracked, junk it and buy a rebuilt or new block.
2007-01-17 04:37:42 · answer #9 · answered by Anonymous · 0⤊ 0⤋
I think that maybe the float needle isnt working properly and fuel is steadily going through the carb even though it isnt getting burned.
2007-01-17 04:37:33 · answer #10 · answered by Joe K 6 · 1⤊ 0⤋