Last post on Nov 03, 2013 at 4:31 PM
You are in the Chevy Venture
What is this discussion about?
Chevrolet Venture, Engine, Van
#304 of 405 Re: engine swap [ben021681]
Feb 24, 2013 (6:20 pm)
The engine is called a LA1 by GM. That engine fits a bunch of front wheel drive vehicles I noted in my post from 1997-05. The transmission for the first Venture/Silhouette/Montana vans were called 4T60E. In 1999 GM went to a 4T65E. The differences were a bigger torque converter (245mm to 258mm), different internal electronics, different final drive gearing and different valve body. None of that changed the configuration of the outer transmission bellhousing which married to the LA1 engine. I recommend you go to WIKIPEDIA and do a search on CHEVROLET VENTURE and you will see everything in gory detail. Click on the engine and transmission to see what I am talking about. In short the engines are interchangeable from 97-05 BUT the transmissions are not. I am not an expert on transmissions, so from what I read there are 12 different final drives in the transmissions so even through the engines are interchangeable, the transmissions are very specific to the car. In installing the 2000 engine into my 1998 I stripped the engine down to just the heads and block and had to reuse all the 98 intake, fuel injection with injectors, exhaust manifolds and old sensors. That really hurt to have to discard newer parts in favor of the old parts, but that is what it took.
Since the discussion centers on transmissions I do not have any experience with the newer 4T65E trans. My old 4T60 E is absolutely flawless and shifts like the day it was installed at the factory. I have 176,000 miles on it and it runs circles around the two Fords (F150/Lincoln) my family runs. Those are somewhat clunky on shifting and both those vehicles have had transmissions rebuilt. The F150 at 62k and the Lincoln at 100k. Ford does not know how to build a transmission, but their engines last. In the case of GM the engines seem to be like Ford transmissions. So in the end there are both about the same.
#305 of 405 Re: engine swap [russ23]
Feb 27, 2013 (8:24 am)
Thank you for taking the time to respond. The way I read your original post I misunderstood what you where saying. So in short the LA1will fit a 97-05 chevy venture but not the same for the transmissions.
This leaves me with one last question:
When I go to buy the master rebuild kit do I get one for a 98 or a 2000 engine?
I found a large price difference between the two.
My first thought is to get a 98 kit as you noted all the old parts from your 98 had to be used on the 2000 block.
Is this correct?
Thank you again!
#306 of 405 Re: engine swap [ben021681]
Feb 27, 2013 (9:17 pm)
I cannot help you on this. If you have a 1998 engine you need to get 1998 parts. Just because the engine fits from 1997 to 2005, does not mean the internals such as rocker arms, cranks, piston rings, bearings will not be different. I did mention in going from a 1998 to a 2000 engine I had to use all the old external parts such as exhaust, fuel rails and injectors, etc. Those old parts bolted on just fine with NO parts left over. I got burned trying to rebuild my 1998 engine. Threw a ton of money at it just to change out the cam bearings and when done it leaked oil horribly. I trashed that engine and got a 2000 Venture engine out of the junkyard and I have been happy every since. Have 40,000 miles on it and it does not use oil and 19 mpg. You would have to look at the parts listing for both engines and compare to see the difference. I strongly recommend NOT rebuild a 1998 engine. Too many things to go wrong and a ton of cost for proper machining. You should be able to get long blocks for under $2000 which is probably cheaper than trying to rebuild it yourself. Since the external parts on the 1998 are different from the 2000 that also meant the gaskets would be different as well.
#308 of 405 Help Please : High Idle Problems w/ 00 Chevy Venture
May 17, 2009 (5:43 pm)
I am hoping someone can help me. For some time my 2000 chevy venture was leaking water and oil and at an idle the vehicle would run extremely hot. About a month ago I brough it in and per the invoice the below was replaced :
Intake Gasket Set
Valve Cover Gasket Set
Thermostat and Gasket
Oil Filter w/ 4.5 qts oil
Oil pump shaft o rings
oil ring for heater hose
Below the invoice it also states : Radiator needs to be flushed ( why the mechanic didn't do this not sure ).
A couple weeks after getting it back the idle starting running really high ( sounded like the engine would come out from under the hood ). The service engine soon light also came on and lasted a couple of days. We were going to bring it to autozone for the code but then the light went off and has not come on since about 3 weeks now. Every once in a while I will begin to idle extremely high again. Problem is I will never know when it will do this and even while it does it the service engine light has not come back on. I just paid $700 for all the above. Does anyone have any idea why it would be doing this and what I can do to fix a problem that now seems to come and go ?
Thanks so much !
#309 of 405 Re: Help Please : High Idle Problems w/ 00 Chevy Venture [melissa18]
Jun 01, 2009 (11:26 am)
I had the same problems
had the troddle sensor replaced in it last year
and it has done it a few times once again
Jul 08, 2009 (12:53 pm)
I had the same problem. It's probably a vacumm leak. By process of elminiation, I started replacing the vacumm lines. In the end, the hard line from the intake boot that runs to the rear intake valve cover was the problem. It was actually loose, but I couldn't tell until I rotated the motor.
Car's been fine ever since.
#311 of 405 Re: Help Please : High Idle Problems w/ 00 Chevy Venture [pepsi1310]
Oct 03, 2011 (8:09 pm)
Here is the technical discussion on throttle position sensor (TPS) and high idle.
When throttle is closed Powertrain Control Module (PCM) sees about 0.5 (plus minus 0.2 or so depending on a particular sensor) Volts. When ignition is turned on PCM records the voltage as 0% throttle.
If TPS is worn out or wires are loose the voltage may drop below initially recorded by PCM and PCM will assign 0% to a lower voltage, for example 0.3 Volts. As a result the original voltage of 0.5 Volts is interpreted by PCM as 4% open throttle, enough for PCM to start thinking that throttle is partially open and stop idle control loop completely.
Check engine light goes on only when TPS voltage drops below 0.2 Volts or so.
I was only able to figure it out after borrowing a professional scan tool and monitoring sensor data while driving.
#312 of 405 Chevy Venture Check Engine Light, Misfiring
Sep 13, 2013 (6:43 pm)
#313 of 405 1999 Chevy Venture, a scary story
Apr 24, 2007 (12:54 pm)
Okay, get this. I had my back oil pan gaskets fixed, water pump replaced and new radiator put on. (Mechanic claimed that when he was tightening up hoses, the radiator tray fell & broke therefore I had to have the radiator replaced at my cost!) Now the, "Service Engine soon" light is on. I have a 1999 chevy venture. I took the van to have it checked at "Autozone" (for free) and the said it was registering a 4; meaning I either have a cracked hose (which they were also replaced by mechanic) or the seal on my gas tank top was broke. I replaced the gas tank top & the light is still on.Also, I had the brakes replaced in the front, one of the axels was broke off, according to "Brake Check." What a nightmare! I have only had the van for 9 months. My sister bought it as a gift for me but with no warranty. An, "AS IS" type of deal for less than 9 grand. Any mechanics out there that might have some advice? I am so upset. I just paid a total of 3 grand to have the above replaced & fixed and now the engine light is on. I am on a fixed income and the sole provider for my family with one vehicle....this piece of junk! HELP!!!!