Overheating
Thread Starter
3rd Gear
Joined: May 2006
Posts: 3
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Overheating
I am in need of some help and someone to point me in the right direction My friend just bought a 1933 ford roadster at an auction we never met the owner so we have no back round info on the built this is a coast to coast glass reproduction we belive the engine is a 99 LS1 5.7 has coils on valve covers low mount altanator driver side and i was told reverse flow cooling because of the water pump pulley is flat not ribbed we have not looked into the block numbers yet to pin point what we have but belive at this time its a 99 or 2000 the computer has a decal that says must be 99 compatable first its was running ruff like 2 or more cylinder we not firing will pulled the plugs they we nippons lazer fire style i was told we cleaned the old ones that look new but full of black carbon no local auto parts had them in stock so we reinstalled them. And then we found the pcv hose off at the throttle body and the two lower port were open and we capped the off and the larger hose driver side of throttle body its on a brass nipple about a 3/8 id hose was run back to the fuel pressure regulator valve and the nipple on the fuel valve is 7/32 so the vale was never getting a vaccuum ok
Thread Starter
3rd Gear
Joined: May 2006
Posts: 3
Likes: 0
Over Heating more to the story
So now we started the engine and was running real nice good idle and smooth well now we see it running about 215 220 we shut it down some smoke coming up off left valve cover or headers we let it cool pull of thermostat housing witch is an add on housing chrome type by flex cool and chrome flex style hose replace stat with same type and temp range 100 degree celceis and fill with new coolant and we see the stat open water level drops and we add 5o/5o mix and we still see the temp climb 195 200 207 215 race engine and it cools down 5 to 10 points we have dakota digital gauges and we hope the correct senders and we never see the electric fan kick in we trace the wire going to dark blue wire of comp harness we cut and hot wire fan to be on when keyed still running at 200 and no better up and down what is the running temperature of the engine and what temp does the brain tell fan to turn on i know this is just the start of what we will find on this engine swap this is our first Ls1 engine we both ever worked on we need some good books with vacuum and wiring and part sources thanks if you can start us off on the road to recovery
Last edited by lcvmart; May 27, 2006 at 11:58 PM.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
You may want to try ebay, they are always selling corvette manuals on CD's for cheap.
A lot of guys, put lower thermostat's in (160) and reprogram fans to come on earlier.
It might help if you took some pictures and posted up, or look for a tuner in your local area that has the ability to reprogram your PCM.
A lot of guys, put lower thermostat's in (160) and reprogram fans to come on earlier.
It might help if you took some pictures and posted up, or look for a tuner in your local area that has the ability to reprogram your PCM.
Drifting
Joined: Oct 2004
Posts: 1,975
Likes: 9
From: "Philly" Pennsylvania
I thought LT1 (1996 and a few years back from there) engines were reverse cooling and LS1 engines (97 & up) were regular direction flow. Maybe someone knowledgeable on both LT1 & LS1 coolant flow can offer accurate information.
Thread Starter
3rd Gear
Joined: May 2006
Posts: 3
Likes: 0
Thanks for the info.I have one fan only are you telling me that there is 2 fans a low and a high temp fan and and two leads coming from the computer for each fan if so i need to get on e bay and get a manual and wiring diagram.
