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Re: how do i install block heater in 91 2wd 4 cyl sonoma
Hi ryan, yes my friend the best bet is to drain the coolant,as for the block heater,not sure which side for the sonoma but basically it is a frost plug with and internal element attached to it,once you unplug the cord typically there will be a small screw to remove, use a small punch or whatever will work and pop one side to roll the block heater so you can remove it,simple my fried,by the way a new block heater will come with installation instructions :) have fun and good luck ryan take care.
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Im sure your 95 is no different then my 01 sonoma 4x4 u shouldn't need a cherry picker to do the engine mounts a small block of wood and a floor jack to support the engine from underneath and take a little bit of the load off the mount should work you dont have to lift the engine out to do them its not easy this way but is possible and cost less money working for a gm parts department and a former tech you would be spending and average of 75 to 100 an hour labor wise depending on what shop u take it to and what shop labor rates at like near you I would estimate an easy 2 hours labor but it all goes by book time thats or determined at the shops
drain coolant system locate heater cores hoses going through firewall you need to buy the radiator flush kit at any auto parts stores. remove heater cores hoses from one end or buy extra long heater hoses same size as heater core hoses in vechicle at auto parts store use the flush kit when you flush through one of the heater core hoses let the other hose drain in a drain pan when you use home garden hose use low water pressure dont use garden hose to the max or you will rupture heater core. your best bet let radiator shop flush whole coolant system. because heater cores hoses are in a tight spot.make sure engine off if you just going to flush out heater core only .after flushing heater core good time to replace heater core hoses.if job too hard or complicated let radiator shop flush out radiator the engine block and heater core because if radiator stopped up or engine block stopped up the gunk and rust will reenter plug up heater core.if you tight on money you can flush out your own radiator.drain out radiator using large drain pan. remove top radiator hose and remove bottom radiator hoses connect to water pump.use garden hose with flush kit part with water pressure not too high put garden hose to top radiator hose run water until clear water run out bottom radiator hose in drain pan,the flush out engine block remove thermostat.if you had another spare thermostat housing with RTV SILICONE SEALANT THAT HAS SET UP INSTALL THERMOSTAT HOUSING BACK TO ENGINE WITHOUT THERMOSTAT FLUSH OUT THE ENGINE BLOCK, WHEN DONE INSTALL NEW THERMOSTAT THEN INSTALL ORIGINAL THERMOSTAT HOUSING WITH NEW ORING WHICH YOU BUY AT DEALERSHIP.IF ALL SOUND COMPLICATED LET RADIATOR SHOP FLUSH OUT COOLANT SYSTEM.
will be around battery harness or through lower grill driverside here is install instructions hope this helps you find it the car never came with a block heater if you have one it was installed aftermarket let me know if you need any more help
Removal & Installation
Factory block heaters are not installed on these
models. If an aftermarket heater has been installed the following
procedure will most likely work. There are two basic types, one for the
oil and one for the coolant. The oil heater usually just slips into the
dipstick tube or replaces the oil drain plug. The following procedure is
for the coolant type.
Remove the negative battery cable.
Drain the cooling system.
When draining the coolant, keep in mind
that cats and dogs are attracted by ethylene glycol antifreeze, and are
quite likely to drink any that is left in an uncovered container or in
puddles on the ground. This will prove fatal in sufficient quantity.
Always drain the coolant into a sealable container. Coolant should be
reused unless it is contaminated or several years old.
Remove the block heater in the same way as the freeze plugs. Some
heater units have a bolt that must be loosened or a V-Clamp that must
be removed to remove the heating element.
Disconnect the heater connector and remove the heater element.
Coat the new heater with sealant, then install the reverse order of removal.
Fill the engine with coolant, connect the battery cable. Start engine and check for leaks
There are several types of heaters. The easiest one is the type that that takes place of your oil dipstick. Just remove dipstick put dipstick heater in and plug er in ! Easy ! The others involve removing freeze plugs or cutting coolant hoses YUK :(
Check operation of the heater core coolant control valve and associated remote control mechanism. Chech heater coolant hoses are not kinked or crushed, Check that both inlet and return heater hose is equally warm, as this indicates coolant flow through the heater core. If no coolant flow:- Check cooling system is correctly filled, taking care to bleed off any air locks from the system as necessary (with heater coolant valve open); Check heater core is not blocked- if blocked you may be able to backflush.
no real pit falls just drain coolant remove head have head checked at machine shop. Clean engine surface good and rise good with brake clean, make sure head gasket is on correct before head goes on bolt down with proper torque and sequence then finish up then drain oil.
I have a 1999 GMC Sonoma and I had this problem very recently, This is a common problem with your radiator.
- Something for you to check is and hour after your last drive (to let the engine cool down) open the radiator cap. Be careful. It may be pressurized and it may spray. If there is radiator fluid at the top, you should consult a mechanic. Otherwise a fix is easy:
- If there appers to be no fluid, simply find a friend to give you a ride and go to your local auto store (Canadian Tire, Partsource, or their american equivilents).
- Get a container (4 ltrs or 1 qrt) of 50/50 premix radiator coolant. Make sure it's a 50/50 premix. If you are unsure, as a clerk.
- Once you get home, pop your hood and open the radiator cap again.
- Pour the mixture in until it gets to the top.
- With the radiator cap off, start your engine. This will circulate the coolant through the engine. As it does, coolant will drain out of the radiator and into the engine block.
- You need to keep adding coolant to maintain a full radiator.
- When it looks like no more coolant is going into the engine, put the cap back on and go for a drive.
- Check that the heat is working. If so, Good Job!
- If not, you may have to consult a mechanic.